Cheap Flights from Tri-Cities (TRI) to Ontario (ONO)

Popular airlines from Tri-Cities, TN (TRI-Tri-Cities Regional) to Ontario, OR (ONO-Ontario Municipal)

Frequently asked questions

How much does a flight from Tri-Cities Regional Airport (TRI) to Ontario, OR (ONO-Ontario Municipal) cost?
Get a cheap one-way flight or cheap return flight from Tri-Cities Regional Airport (TRI) to Ontario, OR (ONO-Ontario Municipal) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Tri-Cities Regional Airport (TRI) to Ontario, OR (ONO-Ontario Municipal)?
The cheapest month to fly from TRI to ONO is , when demand is low. Off-peak months are often when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Tri-Cities Regional Airport (TRI) to Ontario, OR (ONO-Ontario Municipal)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll take you from TRI to ONO. Then, sort your results by "Price (lowest to highest)" to score a good deal.
How many flights per day from Tri-Cities Regional Airport (TRI) to Ontario, OR (ONO-Ontario Municipal)?
Direct flights from Tri-Cities Regional Airport (TRI) to Ontario, OR (ONO-Ontario Municipal) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from TRI to ONO?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Tri-Cities Regional Airport (TRI) to Ontario, OR (ONO-Ontario Municipal)?
Choose a flight from Tri-Cities Regional Airport (TRI) to Ontario, OR (ONO-Ontario Municipal) that takes off before 3 PM to reduce the risk of cancellations. Departures after this time are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Tri-Cities Regional Airport (TRI) to Ontario, OR (ONO-Ontario Municipal) last-minute?
Booking your ticket from TRI to ONO shortly before your journey is usually more expensive. However, if you're flexible with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book a TRI to ONO flight and hotel package?
Booking a TRI to ONO flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Choose from our wide range of hotels and then add car rentals, flights and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Tri-Cities Regional Airport (TRI) to Ontario, OR (ONO-Ontario Municipal)?
In most instances, you can cancel or modify your TRI to ONO flight. However, there may be additional charges, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like further details, head to our Customer Service portal.

Travel information

Origin airport
Tri-Cities Regional
Destination airport
Ontario Municipal
Distance
1882 mi

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Tri-Cities to Ontario Flights

The cheapest times to fly from Tri-Cities to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Tri-Cities to Ontario are during the month of . You can find some of the cheapest flights from Tri-Cities to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Tri-Cities to Ontario

Sunday is one of the best days to book for cheap flights from Tri-Cities to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Tri-Cities to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Tri-Cities to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Tri-Cities to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Tri-Cities to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Tri-Cities to Ontario Flights

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*Available to One Key members.