--- title: "Denver to Ontario (DEN-ONT) flights from CA $48 - Compare Flights - Expedia.ca" description: "Search for Denver to Ontario (DEN-ONT) flights with one-way prices from CA $48 and roundtrip from CA $89—track the price of your flight today!" canonical: "https://www.expedia.ca/lp/flights/den/ont/denver-to-ontario-intl-airport" language: en-CA market: CA currency: CAD prices_as_of: 2026-11-12T22:54:50Z --- # CA $48 Cheap Flights from Denver (DEN) to Ontario Intl. Airport (ONT) ![A range of rugged mountains with snow-capped peaks under a clear sky.](https://images.trvl-media.com/place/920220451419299840/376f60d1-4bee-464a-b8b4-c9542b4cb378.jpg?impolicy=fcrop&w=1200&h=500&q=medium) [View CA $48 flight on Wed, Jan 13, 2027](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:13/01/2027TANYT&trip=oneway&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:47.97&airProductToken=AQoxCi8IxnISBDEyNjEYg2kgrpsBKIG8ogMwkr2iAzhFQABYAWoEUENfMXIHSzIxWFhTMxIKCAEQARgBKgJGORgBIgQIARABKAIoAygEMA0) ## Popular airlines from Denver International Airport (DEN) to Ontario Intl. Airport (ONT) [Frontier Airlines](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:26/11/2026TANYT&leg2=from:ONT,to:DEN,departure:03/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"F9"}}]) [Alaska Airlines](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:26/11/2026TANYT&leg2=from:ONT,to:DEN,departure:03/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) [United](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:26/11/2026TANYT&leg2=from:ONT,to:DEN,departure:03/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) [Southwest Airlines](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:26/11/2026TANYT&leg2=from:ONT,to:DEN,departure:03/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WN"}}]) [American Airlines](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:26/11/2026TANYT&leg2=from:ONT,to:DEN,departure:03/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) [Delta](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:26/11/2026TANYT&leg2=from:ONT,to:DEN,departure:03/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) ### Be in the know Get alerts if flight prices drop or rise\* ### Book smarter Save up to 30% on select hotels after you book a flight\* ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.ca/login) Find the cheapest flights on Expedia from Denver (DEN) to Ontario Intl. Airport (ONT). Flight ticket prices change frequently based on availability and demand. We send price‑drop alerts to make air travel simple and flexible. The lowest one-way fare found on Expedia for this route in the past 7 days starts at CA $48 for travel on January 13, 2027. ## Cheap Flights from Denver to Ontario (DEN-ONT) Prices were available within the past 7 days and start at CA $48 for one-way flights and CA $89 for roundtrip, for the period specified. Prices and availability are subject to change. All deals One way Roundtrip [Select Frontier Airlines flight, departing Wed, Jan 13 from Denver to Ontario, returning Tue, Jan 19, priced at CA $89 Found 2 days ago](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:13/01/2027TANYT&leg2=from:ONT,to:DEN,departure:19/01/2027TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:88.89&airProductToken=AQozCjEIxnISBDEyNjEYg2kgrpsBKIG8ogMwkr2iAzhLQABYAWoFQmFzaWNyCEsyMVhYUzlBCjIKMAjGchIEMTUwMBiumwEgg2ko0feiAzDd-KIDOEtAAFgBagVCYXNpY3IHSzIxRVhTMxIMCAEQAhgBKgJGOTIAGAEiBAgBEAEoAigDKAQoBjAN) Wed, Jan 13 - Tue, Jan 19 · DEN · ONT · Roundtrip [Select Frontier Airlines flight, departing Tue, Jan 19 from Denver to Ontario, returning Tue, Feb 2, priced at CA $98 Found 1 day ago](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:19/01/2027TANYT&leg2=from:ONT,to:DEN,departure:02/02/2027TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:97.83&airProductToken=AQoyCjAIxnISBDEyNjEYg2kgrpsBKMH%5FogMw0oCjAzhaQABYAWoFQmFzaWNyB1oyMUVYUzMKMwoxCMZyEgQxNTAwGK6bASCDaSjmlaQDMPaWpAM4WkAAWAFqBUJhc2ljcghLMjFFWFM5QRIMCAEQAhgBKgJGOTIAGAEiBAgBEAEoAigDKAQoBjAN) Tue, Jan 19 - Tue, Feb 2 · DEN · ON · T · Roundtrip [Select Frontier Airlines flight, departing Tue, Dec 8 from Denver to Ontario, returning Sat, Dec 12, priced at CA $112 Found 4 days ago](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:08/12/2026TANYT&leg2=from:ONT,to:DEN,departure:12/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:111.55&airProductToken=AQoyCjAIxnISBDE0OTkYg2kgrpsBKIumnwMwmaefAzhLQABYAWoFQmFzaWNyB0syMUVYUzMKMgowCMZyEgQyOTA4GK6bASCDaSiSz58DMKPQnwM4S0AAWAFqBUJhc2ljcgdaMjFPWFM2EgwIARACGAEqAkY5MgAYASIECAEQASgCKAMoBCgGMA0) Tue, Dec 8 - Sat, Dec 12 · DEN · ONT · Roundtrip [Select Frontier Airlines flight, departing Sat, Dec 5 from Denver to Ontario, returning Sat, Dec 12, priced at CA $128 Found 5 days ago](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:05/12/2026TANYT&leg2=from:ONT,to:DEN,departure:12/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:127.09&airProductToken=AQoxCi8IxnISBDE0OTkYg2kgrpsBKKuEnwMwuYWfAzhFQABYAWoEUENfMXIHWjIxT1hTNgoxCi8IxnISBDI5MDgYrpsBIINpKJLPnwMwo9CfAzhFQABYAWoEUENfMXIHWjIxT1hTNhIKCAEQARgBKgJGORgBIgQIARABKAIoAygEMA0) Sat, Dec 5 - Sat, Dec 12 · DEN · ONT · Roundtrip [Select Frontier Airlines flight, departing Tue, Jan 19 from Denver to Ontario, returning Tue, Feb 2, priced at CA $148 Found 1 day ago](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:19/01/2027TANYT&leg2=from:ONT,to:DEN,departure:02/02/2027TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:147.48&airProductToken=AQpjCi8IxnISBDIwMTUYg2kgi5ABKIj4ogMwjvmiAzhFQABYAWoEUENfMXIHWjIxT1hQMgowCMZyEgQxOTIzGIuQASCumwEot%5F6iAzD1%5FqIDOEVAAVgBagRQQ18xcgdaMjFPWFAyCjIKMAjGchIEMTUwMBiumwEgg2ko0ZWkAzDelqQDOEVAAFgBagRQQ18xcghLMjFFWFM5QRIKCAEQARgBKgJGORgBIgQIARABKAIoAygEMA0) Tue, Jan 19 - Tue, Feb 2 · DEN · ONT · Roundtrip [Select Frontier Airlines flight, departing Sat, Dec 5 from Denver to Ontario, returning Wed, Dec 9, priced at CA $152 Found 4 days ago](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:05/12/2026TANYT&leg2=from:ONT,to:DEN,departure:09/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:151.65&airProductToken=AQphCi4IxnISBDEyMjkYg2kgsnEoov-eAzDQgJ8DOEVAAFgBagRQQ18xcgdaMjFTWFMzCi8IxnISBDExNjAYsnEgrpsBKKSFnwMw-4WfAzhFQAFYAWoEUENfMXIHWjIxU1hTMwoxCi8IxnISBDE1MDAYrpsBIINpKOiqnwMw-KufAzhFQABYAWoEUENfMXIHSzIxWFhTMxIKCAEQARgBKgJGORgBIgQIARABKAIoAygEMA0) Sat, Dec 5 - Wed, Dec 9 · DEN · ONT · Roundtrip [Select Frontier Airlines flight, departing Wed, Dec 2 from Denver to Ontario, returning Mon, Dec 7, priced at CA $162 Found 6 days ago](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:02/12/2026TANYT&leg2=from:ONT,to:DEN,departure:07/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:161.67&airProductToken=AQphCi4IxnISBDEyMjkYg2kgsnEottyeAzDo3Z4DOEVAAFgBagRQQ18xcgdaMjFYWFMzCi8IxnISBDExNjAYsnEgrpsBKK%5FjngMwguSeAzhFQAFYAWoEUENfMXIHWjIxWFhTMwoyCjAIxnISBDI5MDgYrpsBIINpKPKWnwMwg5ifAzhFQABYAWoEUENfMXIIWjE0TlhTOUESCggBEAEYASoCRjkYASIECAEQASgCKAMoBDAN) Wed, Dec 2 - Mon, Dec 7 · DEN · ONT · Roundtrip [Select Delta flight, departing Tue, Jan 19 from Denver to Ontario, returning Tue, Feb 2, priced at CA $196 Found 1 day ago](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:19/01/2027TANYT&leg2=from:ONT,to:DEN,departure:02/02/2027TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:195.62&airProductToken=AQpvCjUIxJgBEgQyNjYzGINpIPISKLP9ogMwk%5F6iAzhFQABYAWoJTUFJTkJBU0lDcghWQVZTSDNCQwo2CMSYARIEMTYxNBjyEiCumwEoxv-iAzC9gKMDOEVAAVgBaglNQUlOQkFTSUNyCFZBVlNIM0JDEgoIARABGAEqAkRMGAEiBAgBEAEoAigDKAQwAQ) Tue, Jan 19 - Tue, Feb 2 · DEN · ONT · Roundtrip [Select Alaska Airlines flight, departing Tue, Jan 19 from Denver to Ontario, returning Tue, Feb 2, priced at CA $280 Found 1 day ago](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:19/01/2027TANYT&leg2=from:ONT,to:DEN,departure:02/02/2027TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:280.00&airProductToken=AQpfCi0IwaYBEgMzMTcYg2kgkgEoi%5FiiAzDI-aIDOFhAAFgBagJTVnIIR0gyT1hKQk4KLgjBpgESAzU3MRiSASCumwEoq%5FuiAzDF%5FKIDOFhAAVgBagJTVnIIR0gyT1hKQk4KYgowCMGmARIEMTUyORiumwEg77gBKJiWpAMwqZekAzhYQABYAWoCU1ZyCEdIMk9YSkJOCi4IwaYBEgM2ODQY77gBIINpKNaXpAMw85ikAzhYQAFYAWoCU1ZyCEdIMk9YSkJOEgoIARABGAEqAkFTGAEiBAgBEAEoAigDKAQwAQ) Tue, Jan 19 - Tue, Feb 2 · DEN · ONT · Roundtrip [Select American Airlines flight, departing Tue, Jan 19 from Denver to Ontario, returning Tue, Feb 2, priced at CA $351 Found 1 day ago](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:ONT,departure:19/01/2027TANYT&leg2=from:ONT,to:DEN,departure:02/02/2027TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:350.90&airProductToken=AQppCjIIwYIBEgQyMjI2GINpIO-5ASiI-KIDMIX5ogM4QkAAWAFqBUJBU0lDcghRVkFJWFNCVgozCMGCARIEMzAxNhjvuQEgrpsBKMn6ogMwl%5FuiAzhCQAFYAWoFQkFTSUNyCFFWQUlYU0JWCmkKMwjBggESBDE4ODkYrpsBIO-5ASiYl6QDMOyXpAM4QkAAWAFqBUJBU0lDcghPVkFJVVNCVgoyCMGCARIEMzkwNhjvuQEgg2kov5ikAzC2maQDOEJAAVgBagVCQVNJQ3IIT1ZBSVVTQlYSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) Tue, Jan 19 - Tue, Feb 2 · DEN · ONT · Roundtrip ## Alternative airports near Ontario Prices were available within the past 7 days. Prices and availability are subject to change. [Select flight to John Wayne SNA. Cheapest option available. Average driving time to city centre is 42 minutes. Flights from CA $418](https://www.expedia.ca/Flights-Search?leg1=from:DEN,to:SNA,departure:26/11/2026TANYT&leg2=from:SNA,to:DEN,departure:30/11/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) 42 min ## Book with confidence ### Denver to Ontario Flights #### The easy way to book your flights from Denver to Ontario Intl. Airport With Expedia, it’s simple to find and book flights to Ontario Intl. Airport from Denver whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 5 airlines that cover this route. There are United Airlines, Frontier Airlines nonstop flights to Ontario Intl. Airport, too. Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Denver to Ontario Intl. Airport today, tomorrow, or this week. #### Save dollars with cheap flights from Denver Intl., DEN to Ontario Intl. Airport, ONT Sort your search results by price to find great deals on your flight from Denver to Ontario Intl. Airport—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Ontario Intl. Airport from Denver currently is just CA $89 rising to CA $351\. Here are more money-saving tips: - Fly in January when flight prices are normally at their lowest - Book about a month to 6 weeks before you travel for the best prices to Ontario Intl. Airport - Avoid peak season and weekends when flights can cost more - Early morning and late-night flights are sometimes cheaper, so try varying your travel times - One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! #### Reasons to choose Expedia for your flight to Ontario Intl. Airport from Denver Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Ontario Intl. Airport with Expedia today. ## Frequently Asked Questions ### How much does a flight from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT) cost? You can find cheap one-way flights from CA $48 and cheap return flights CA $89 DEN to ONT with Expedia. One-way flights typically cost between CA$786 and CA$1665\. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when DEN to ONT ticket fares go up or down. ### What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT)? September is typically the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT), with average return fares around CA$308\. September often sees lower prices as the summer travel rush ends and before the holiday season begins, leading to reduced demand. Other cheap months to fly from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT) include February and April. ### Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT)? You have 3 airlines offering direct flights from Denver Intl. (DEN) to Ontario Intl. Airport (ONT). Here are the carriers: \* Southwest Airlines operates 26 direct flights from Denver Intl. to Ontario Intl. Airport every week. \* United operates 16 direct flights from Denver Intl. to Ontario Intl. Airport every week. \* Frontier Airlines operates 14 direct flights from Denver Intl. to Ontario Intl. Airport every week. ### What is the cheapest airline that flies from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT)? Frontier Airlines is one of the cheapest airlines offering nonstop return flights from Denver Intl. (DEN) to Ontario Intl. Airport (ONT), with tickets starting from around CA$77 for flights that can be booked for departure within the next year. JetBlue Airways offers one of the cheapest connecting return flights from Denver Intl. (DEN) to Ontario Intl. Airport (ONT) starting from around CA$532\. These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget. ### How do I find cheap flights from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT)? To find a cheap flight from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up [Price Tracking](https://www.expedia.ca/why/price-tracking) and receive alerts when fares go up or down. ### What is the best airline to fly with from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT)? The best airline to fly with from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT) will differ from traveler to traveler. If you like to fly early, Southwest Airlines offers early morning flights. If price is the most important factor, Frontier Airlines typically offers the lowest fares. Southwest Airlines offers the most daily flights from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access. ### What is the best time to fly from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT)? The cheapest months to fly from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT) are typically September and February, with average return flights around CA$308\. The most popular months for this route are April and January, meaning you'll find plenty of flight options during these times. While there isn't a single month that is both the cheapest and most popular, you can balance cost and availability by considering September or February for better prices, or April and January for more flight choices. ### How many flights per day from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT)? You'll find approximately 8 nonstop flights per day from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT). For even more choices, look at flights that include layovers, as there are around 114 connecting flights per day. Some common connection points include Seattle - Tacoma Intl. (SEA), Harry Reid Intl. (LAS), and Portland Intl. (PDX). ### What is the earliest flight from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT)? The earliest flight from Denver International Airport (DEN) to Ontario International Airport (ONT) typically departs around 12:40 AM local time, operated by Delta. This is a seasonal service, active only in June. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search. ### What day of the week has the most flights from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT)? You'll typically find the most flights from Denver International Airport (DEN) to Ontario International Airport (ONT) on a Friday, with around 89 flights available. This gives you plenty of options if you're planning a weekend getaway or a business trip. Major airlines on this route include Southwest Airlines, Frontier Airlines, and Alaska Airlines. Fridays offer notably more flight options compared to other days of the week, making it a popular choice for travellers. ### What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT)? The most popular departure times for flights from Denver Intl. (DEN) to Ontario Intl. Airport (ONT) are in the early morning, from 6am to 9am. Many major carriers, including Southwest Airlines, Frontier Airlines and Alaska Airlines, offer flights during this window. Many travellers prefer these early flights as they allow you to arrive at your destination with plenty of time to start your day. ### How long does it take to fly from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT)? A nonstop flight from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT) typically takes around 2 hours 30 minutes. This route covers a distance of approximately 1,315 kilometers. If you opt for a one-stop flight, your travel time will be longer, usually around 7 hours. Flights with two or more stops can take even longer, often around 7 hours as well. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some flexibility in your travel plans. ### Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT)? You can fly business class or first class between DEN and ONT. You can fly business class with Frontier Airlines and Delta. First class cabins are available on: - Alaska Airlines - Delta - American Airlines - United ### How do I earn miles on a Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT) flight with Expedia? It's easy to earn miles on a Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of [One Key™](https://www.expedia.ca/welcome-one-key), you can also earn OneKeyCash™\* on top of your airline miles when you book with Expedia. \*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands. ### What airports do you fly into for Ontario Intl. Airport (ONT) from Denver, CO (DEN)? If you're planning to travel to Ontario from Denver Intl. (DEN), you can fly directly into Los Angeles - Ontario Intl. (ONT) which offers international flights and connections. Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), San Diego Intl. (SAN), or Portland Intl. (PDX) before reaching Ontario. Compare routes and airports on Expedia to find the best flight options for your travel plans. ### Is it cheaper to buy a plane ticket from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT) at the last minute? Typically, booking a last minute flight from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare. ### Is it cheaper to book a Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT) flight and hotel package? Securing a Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT) [flight and hotel package](https://www.expedia.ca/los-angeles.d178280.destination-travel-guides) is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars. ### Can I cancel or change the date of my flight from Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT)? If you booked your Denver, CO (DEN-Denver Intl.) to Ontario Intl. Airport (ONT) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in [your itinerary](https://www.expedia.ca/trips) or confirmation email. Or, head to our [Customer Service portal](https://www.expedia.ca/helpcenter/) if you'd like more information. ## Travel information | Origin airport | Denver International Airport | | ------------------- | ---------------------------------------------------------------------------------------- | | Destination airport | Ontario Intl. Airport | | Distance | 1,313 km away | | Airlines serving | Frontier Airlines, Alaska Airlines, United, Southwest Airlines, American Airlines, Delta | | Popular airline | Frontier Airlines | | Roundtrip price | CA $89 | | Average flight time | 2 hours 51 mins | ## Explore a world of travel with Expedia - [Flights](?equalTargetTab=tab-0) - [Flights from Nanaimo (YCD) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/ycd/ont/nanaimo-to-ontario) - [Flights from Fort Myers (RSW) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/rsw/ont/fort-myers-to-ontario) - [Flights from Medicine Hat (YXH) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yxh/ont/medicine-hat-to-ontario) - [Flights from Richmond (RIC) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/ric/ont/richmond-to-ontario) - [Flights from Tampa (TPA) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/tpa/ont/tampa-to-ontario) - [Flights from Toronto (YYZ) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yyz/ont/toronto-to-ontario) - [Flights from Miami (MIA) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/mia/ont/miami-to-ontario) - [Flights from London (LHR) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/lhr/ont/london-to-ontario) - [Flights from Charlotte (CLT) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/clt/ont/charlotte-to-ontario) - [Flights from Philadelphia (PHL) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/phl/ont/philadelphia-to-ontario) - [Flights from Spokane (GEG) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/geg/ont/spokane-to-ontario) - [Flights from Indianapolis (IND) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/ind/ont/indianapolis-to-ontario) - [Flights from Calgary (YYC) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yyc/ont/calgary-to-ontario) - [Flights from Penticton (YYF) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yyf/ont/penticton-to-ontario) - [Flights from Whitehorse (YXY) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yxy/ont/whitehorse-to-ontario) - [Flights from Madison (MSN) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/msn/ont/madison-to-ontario) - [Flights from Washington (DCA) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/dca/ont/washington-to-ontario) - [Flights from Lagos (LOS) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/los/ont/lagos-to-ontario) - [Flights from St. Thomas (STT) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/stt/ont/st-thomas-to-ontario) - [Flights from Vancouver (YVR) to Los Angeles (QLA)](https://www.expedia.ca/lp/flights/yvr/qla/vancouver-to-los-angeles) - [Flights from Houston (IAH) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/iah/ont/houston-to-ontario) - [Flights from Seattle (SEA) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/sea/ont/seattle-to-ontario) - [Flights from St. Louis (STL) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/stl/ont/st-louis-to-ontario) - [Flights from Hamilton (YHM) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yhm/ont/hamilton-to-ontario) - [Flights from Orange County (SNA) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/sna/ont/orange-county-to-ontario) - [Flights from Orlando (MCO) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/mco/ont/orlando-to-ontario) - [Flights from Vancouver (YVR) to Los Angeles (LAX)](https://www.expedia.ca/lp/flights/yvr/lax/vancouver-to-los-angeles) - [Flights from Newark Liberty Intl. Airport (EWR) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/ewr/ont/newark-liberty-intl-airport-to-ontario) - [Flights from Portland (PDX) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/pdx/ont/portland-to-ontario) - [Flights from Calgary (YYC) to Los Angeles (LAX)](https://www.expedia.ca/lp/flights/yyc/lax/calgary-to-los-angeles) - [Flights from Minneapolis (MSP) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/msp/ont/minneapolis-to-ontario) - [Flights from Edmonton (YEG) to Los Angeles (LAX)](https://www.expedia.ca/lp/flights/yeg/lax/edmonton-to-los-angeles) - [Flights from Sacramento (SMF) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/smf/ont/sacramento-to-ontario) - [Flights from Abbotsford (YXX) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yxx/ont/abbotsford-to-ontario) - [Flights from Amsterdam (AMS) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/ams/ont/amsterdam-to-ontario) - [Flights from Jacksonville (JAX) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/jax/ont/jacksonville-to-ontario) - [Flights from Québec (YQB) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yqb/ont/quebec-to-ontario) - [Flights from Toronto (YYZ) to Los Angeles (LAX)](https://www.expedia.ca/lp/flights/yyz/lax/toronto-to-los-angeles) - [Flights from Rochester (ROC) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/roc/ont/rochester-to-ontario) - [Flights from Ottawa (YOW) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yow/ont/ottawa-to-ontario) - [Flights from Edmonton (YEG) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yeg/ont/edmonton-to-ontario) - [Flights from Nashville (BNA) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/bna/ont/nashville-to-ontario) - [Flights from New York (LGA) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/lga/ont/new-york-to-ontario) - [Flights from Boston (BOS) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/bos/ont/boston-to-ontario) - [Flights from Vancouver (YVR) to Orange County (SNA)](https://www.expedia.ca/lp/flights/yvr/sna/vancouver-to-orange-county) - [Flights from Palm Springs (PSP) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/psp/ont/palm-springs-to-ontario) - [Flights from San Jose (SJC) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/sjc/ont/san-jose-to-ontario) - [Flights from Ogdensburg (OGS) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/ogs/ont/ogdensburg-to-ontario) - [Flights from Hartford (BDL) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/bdl/ont/hartford-to-ontario) - [Flights from Atlanta (ATL) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/atl/ont/atlanta-to-ontario) - [Flights from Winnipeg (YWG) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/ywg/ont/winnipeg-to-ontario) - [Flights from Phoenix (PHX) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/phx/ont/phoenix-to-ontario) - [Flights from Toronto (YYZ) to Orange County (SNA)](https://www.expedia.ca/lp/flights/yyz/sna/toronto-to-orange-county) - [Flights from Manila (MNL) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/mnl/ont/manila-to-ontario) - [Flights from Louisville (SDF) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/sdf/ont/louisville-to-ontario) - [Flights from Ottawa (YOW) to Los Angeles (LAX)](https://www.expedia.ca/lp/flights/yow/lax/ottawa-to-los-angeles) - [Flights from Baltimore (BWI) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/bwi/ont/baltimore-to-ontario) - [Flights from Charlottetown Alexander B. Campbell Airport (YYG) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yyg/ont/charlottetown-to-ontario) - [Flights from Fresno (FAT) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/fat/ont/fresno-to-ontario) - [Flights from Las Vegas (LAS) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/las/ont/las-vegas-to-ontario) - [Flights from Los Angeles (LAX) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/lax/ont/los-angeles-to-ontario) - [Flights from Brandon (YBR) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/ybr/ont/brandon-to-ontario) - [Flights from Taipei (TPE) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/tpe/ont/taipei-to-ontario) - [Flights from Kelowna (YLW) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/ylw/ont/kelowna-to-ontario) - [Flights from Saint John (YSJ) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/ysj/ont/saint-john-to-ontario) - [Flights from Fort McMurray (YMM) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/ymm/ont/fort-mcmurray-to-ontario) - [Flights from Saskatoon (YXE) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yxe/ont/saskatoon-to-ontario) - [Flights from Lethbridge (YQL) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yql/ont/lethbridge-to-ontario) - [Flights from Birmingham (BHM) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/bhm/ont/birmingham-to-ontario) - [Flights from Burlington (BTV) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/btv/ont/burlington-to-ontario) - [Flights from Reno (RNO) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/rno/ont/reno-to-ontario) - [Flights from Syracuse (SYR) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/syr/ont/syracuse-to-ontario) - [Flights from Deer Lake (YDF) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/ydf/ont/deer-lake-to-ontario) - [Flights from Victoria (YYJ) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yyj/ont/victoria-to-ontario) - [Flights from Barstow (DAG) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/dag/ont/barstow-to-ontario) - [Flights from Moncton (YQM) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yqm/ont/moncton-to-ontario) - [Flights from Buffalo (BUF) to Los Angeles (LAX)](https://www.expedia.ca/lp/flights/buf/lax/buffalo-to-los-angeles) - [Flights from Fredericton (YFC) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yfc/ont/fredericton-to-ontario) - [Flights from Montreal (YUL) to Los Angeles (LAX)](https://www.expedia.ca/lp/flights/yul/lax/montreal-to-los-angeles) - [Flights from Sydney (SYD) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/syd/ont/sydney-to-ontario) - [Flights from Thunder Bay (YQT) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yqt/ont/thunder-bay-to-ontario) - [Flights from Dallas (DFW) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/dfw/ont/dallas-to-ontario) - [Flights from Regina (YQR) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yqr/ont/regina-to-ontario) - [Flights from St. John's (YYT) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yyt/ont/st-johns-to-ontario) - [Flights from Yellowknife (YZF) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yzf/ont/yellowknife-to-ontario) - [Flights from Grande Prairie (YQU) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yqu/ont/grande-prairie-to-ontario) - [Flights from New York (JFK) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/jfk/ont/new-york-to-ontario) - [Flights from Kansas City (MCI) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/mci/ont/kansas-city-to-ontario) - [Flights from Torrance (TOA) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/toa/ont/torrance-to-ontario) - [Flights from Halifax (YHZ) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yhz/ont/halifax-to-ontario) - [Flights from Salt Lake City (SLC) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/slc/ont/salt-lake-city-to-ontario) - [Flights from Winnipeg (YWG) to Los Angeles (LAX)](https://www.expedia.ca/lp/flights/ywg/lax/winnipeg-to-los-angeles) - [Flights from Oakland (OAK) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/oak/ont/oakland-to-ontario) - [Flights from Delhi (DEL) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/del/ont/delhi-to-ontario) - [Flights from Austin (AUS) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/aus/ont/austin-to-ontario) - [Flights from Montreal (YUL) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/yul/ont/montreal-to-ontario) - [Flights from Prince Albert (YPA) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/ypa/ont/prince-albert-to-ontario) - [Flights from Chicago (ORD) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/ord/ont/chicago-to-ontario) - [Flights from Las Vegas (LAS) to Los Angeles (LAX)](https://www.expedia.ca/lp/flights/las/lax/las-vegas-to-los-angeles) - [Flights from San Diego (SAN) to Ontario Intl. Airport (ONT)](https://www.expedia.ca/lp/flights/san/ont/san-diego-to-ontario) \*Available to Expedia members. ## Other language versions ```yaml hreflang: x-default: https://www.expedia.com/lp/flights/den/ont/denver-to-ontario-intl-airport en-JP: https://www.expedia.co.jp/en/lp/flights/den/ont/denver-to-ontario-intl-airport en-SG: https://www.expedia.com.sg/lp/flights/den/ont/denver-to-ontario-intl-airport en-KR: https://www.expedia.co.kr/en/lp/flights/den/ont/denver-to-ontario-intl-airport en-AU: https://www.expedia.com.au/lp/flights/den/ont/denver-to-ontario-intl-airport en-MY: https://www.expedia.com.my/lp/flights/den/ont/denver-to-ontario-intl-airport ja-JP: https://www.expedia.co.jp/lp/flights/den/ont/denver-to-ontario-intl-airport es: https://www.expedia.com/es/lp/vuelos/den/ont/denver-a-aeropuerto-internacional-laontario en-CA: https://www.expedia.ca/lp/flights/den/ont/denver-to-ontario-intl-airport ko-KR: https://www.expedia.co.kr/lp/flights/den/ont/denver-to-ontario-intl-airport id-ID: https://www.expedia.co.id/lp/flights/den/ont/denver-to-bandara-internasional-ontario es-MX: https://www.expedia.mx/lp/vuelos/den/ont/denver-a-aeropuerto-internacional-laontario ar: https://www.expedia.sa/lp/flights/den/ont/denver-to-ontario-intl-airport fr-CA: https://www.expedia.ca/fr/lp/vols/den/ont/denver-a-ontario pt-BR: https://www.expedia.com.br/lp/voos/den/ont/denver-para-aeroporto-internacional-de-ontario zh-CN: https://www.expedia.com/cn/lp/flights/den/ont/denver-to-ontario-intl-airport en-IN: https://www.expedia.co.in/lp/flights/den/ont/denver-to-ontario-intl-airport en-US: https://www.expedia.com/lp/flights/den/ont/denver-to-ontario-intl-airport ```