CA $109 Cheap Flights from Denver (DEN) to Ontario (ONT)

Popular airlines from Denver International Airport (DEN) to Los Angeles - Ontario Intl. Airport (ONT)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards

Cheap flights from Denver (DEN) to Ontario (ONT)

Prices were available within the past 7 days and start at CA $109 for one-way flights and CA $265 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
United
United
United
United
Alaska Airlines
United
United
United
Alaska Airlines
Flight from Denver to Ontario (DEN - ONT) route information
Origin airport
Denver Intl.
Destination airport
Los Angeles - Ontario Intl.
Roundtrip price
CA $264
Distance
1306 km
Average flight time
1 hour 27 mins

Denver to Los Angeles Flights

The easy way to book your flights from Denver to Ontario 

With Expedia, it’s simple to find and book flights to Ontario from Denver whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are Air Canada, Frontier Airlines, Southwest Airlines, United Airlines nonstop flights to Los Angeles - Ontario Intl., 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 today, tomorrow, or this week.  

 

Save dollars with cheap flights from Denver Intl., DEN to Los Angeles - Ontario Intl., ONT 

Sort your search results by price to find great deals on your flight from Denver to Ontario—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Ontario from Denver currently is just CA $265 rising to CA $401.  

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  
  • 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 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 with Expedia today.

Frequently asked questions

How much is a flight from DEN to Ontario Airport?
Based on fares listed within the last 7 days on Expedia for flights departing within the next year, round-trip flights between DIA airport and Ontario Airport start from CA $265. Make your booking ASAP to get the best price for your journey. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from DIA airport to ONT?
Each air carrier has its own set of terms and conditions. If you do decide to cancel, follow the instructions on our Customer Service Portal.
How do I find cheap flights from Denver Airport to ONT that have flexible change policies?
Use our "No change fees" filter to find flexible travel options for your flight from Denver Airport to Ontario Airport. This allows you to lock in a great deal in advance and still have the freedom to reschedule without any extra fees. Just keep in mind that fare differences may still apply.
How many hours is the flight from Denver Airport to Los Angeles - Ontario Intl. Airport (ONT)?
It only takes around 2 hours and 27 minutes to fly from Denver Intl. Airport (DEN) to Ontario Airport. Buckle up and make yourself comfortable — but not too comfortable. You'll be in Ontario before long.
How far is the flight from Denver Airport to ONT?
The flight distance from Denver Intl. Airport (DEN) (DEN) to Los Angeles - Ontario Intl. Airport (ONT) (ONT) is just 1,300 kilometres. You'll be walking down the air bridge and collecting your bags from the carousel in next to no time.
Which airlines fly direct from Denver Airport to Los Angeles - Ontario Intl. Airport (ONT)?
There are several airlines that travel directly from Denver Airport to ONT. Southwest Airlines (WN) is an excellent choice, offering 100 flights every month. After more options? Check out the airfares with United Airlines (UA). This carrier offers 60 fights monthly between these destinations.
Are DIA airport to ONT flight tickets cheaper when they're purchased at the last minute?
Flight tickets from Denver Airport to Ontario Airport are available up to a year before departure on Expedia. And although you may occasionally pick up a great last-minute deal, it's never something you can count on. Also, booking your flights ahead of time means you'll have more choices — and you can avoid getting caught in the dreaded middle seat! We're always updating our fares to bring you the biggest bargains, so check back often for all the latest specials.

Explore a world of travel with Expedia

Ontario nearby Airports

Los Angeles

Orange County

*Available to Expedia members.