Title: Cheap Flights from Tri-Cities (TRI) to Ontario (ONT) - Expedia.ca ![Ontario showing night scenes and street scenes](https://images.trvl-media.com/place/2680/6f6cbfd1-6188-4a75-9ba7-05d8edf0fb1d.jpg?impolicy=fcrop&w=1200&h=500&q=medium) Photo by Ontario Convention & Visitors Bureau / Jon Edwards. ![](https://images.trvl-media.com/place/2680/6f6cbfd1-6188-4a75-9ba7-05d8edf0fb1d.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from Tri-Cities (TRI) to Ontario (ONT) - [Roundtrip](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Tri-Cities, TN (TRI-Tri-Cities Regional) to Los Angeles - Ontario Intl. Airport (ONT) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:tri,to:ont,departure:11/11/2025TANYT&leg2=from:ont,to:tri,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![Delta](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.ca/Flights-Search?leg1=from:tri,to:ont,departure:11/11/2025TANYT&leg2=from:ont,to:tri,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) ![notification illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.ca/login) ## Find the cheapest month to fly from Blountville (TRI) to Ontario (ONT) ### February is typically the cheapest month to fly From CA $421 - CA $1,085 per traveller. ## Frequently asked questions ### How much is a flight from Tri-Cities Airport to Ontario Airport? > Based on airfares listed within the last 7 days on Expedia for flights departing within the next year, round-trip flights from TRI to ONT start from . Book today to get the best price for your trip. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from Tri-Cities Airport to ONT? > Each air carrier has its own terms and conditions. If you do decide to cancel, follow the simple instructions on our [Customer Service Portal](https://www.expedia.ca/helpcenter). ### How do I find cheap flights from TRI to Ontario Airport that have flexible change policies? > Select our "No change fees" filter to find flexible ticketing options for your flight from Tri-Cities Airport to Ontario Airport. This allows you to snag a great price in advance and still have the freedom to reschedule without any additional fees. You'll just need to pay the fare difference, if applicable. ### How many hours is the flight from Tri-Cities Regional Airport (TRI) to Ontario Airport? > The flight time from TRI to Los Angeles - Ontario Intl. Airport (ONT) is around 6 hours and 16 minutes. Grab your headphones, listen to your favourite tunes and the hours will whiz by. ### How far is the flight from TRI to Ontario Airport? > The flight distance from TRI to ONT is 3,200 kilometres. Pack yourself a snack, a drink and a good book to read. Keep yourself entertained and the hours will fly by. ### Which airlines fly direct from TRI to ONT? > Unfortunately, there are no airlines that fly direct between Tri-Cities Regional Airport (TRI) and Ontario Airport. You'll need to book a flight with at least one stop. ### Are Tri-Cities Regional Airport (TRI) to ONT flight tickets cheaper when they're purchased at the last minute? > Fares from Tri-Cities Regional Airport (TRI) to Ontario Airport are available up to a year prior to departure on Expedia. And although you may pick up great last-minute deal, it's never a sure thing. Also, booking your flights ahead of time means you'll have more options — and you can avoid getting trapped in the dreaded middle seat! We're constantly updating our fares to bring you the biggest bargains, so keep checking in for all the latest specials. ## Travel information | Origin airport | Tri-Cities Regional | | --- | --- | | Destination airport | Los Angeles - Ontario Intl. | | Distance | 3168 km | ## Book with confidence ### Blountville to Los Angeles Flights **The easy way to book your flights from Tri-Cities to Ontario**  With Expedia, it’s simple to find and book flights to Ontario from Tri-Cities whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from airlines that cover this route. There are 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 Tri-Cities to Ontario today, tomorrow, or this week.   **Save dollars with cheap flights from Tri-Cities Regional, TRI to Los Angeles - Ontario Intl., ONT**  Sort your search results by price to find great deals on your flight from Tri-Cities to Ontario—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Ontario from Tri-Cities currently is just rising to .   Here are more money-saving tips:  - Fly in 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 Tri-Cities**  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. ## Explore a world of travel with Expedia - Flights - [Flights from Bamfield to Ontario](https://www.expedia.ca/lp/flights/10552/2680/bamfield-to-ontario) - [Flights from Revelstoke to Ontario](https://www.expedia.ca/lp/flights/10607/2680/revelstoke-to-ontario) - [Flights from Dutch Harbor to Ontario](https://www.expedia.ca/lp/flights/1075/2680/dutch-harbor-to-ontario) - [Flights from Devils Lake to Ontario](https://www.expedia.ca/lp/flights/1076/2680/devils-lake-to-ontario) - [Flights from Heraklion to Ontario](https://www.expedia.ca/lp/flights/1444/2680/heraklion-to-ontario) - [Flights from Harbin to Ontario](https://www.expedia.ca/lp/flights/1510/2680/harbin-to-ontario) - [Flights from Hilo to Ontario](https://www.expedia.ca/lp/flights/1643/2680/hilo-to-ontario) - [Flights from Jamestown to Ontario](https://www.expedia.ca/lp/flights/1709/2680/jamestown-to-ontario) - [Flights from Athens to Ontario](https://www.expedia.ca/lp/flights/178231/2680/athens-to-ontario) - 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