$309 Cheap flights from Los Angeles - Ontario Intl. to Tri-Cities Regional (ONT to TRI)

Discover our best flights from Ontario ONT to Tri-Cities TRI. 

With 20 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times. 

Find our best return flights from Ontario ONT to Tri-Cities TRI at the right price  

Airfares to Tri-Cities TRI from Ontario ONT currently cost between $368 and $488. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply. 

Book one-way flights from Ontario ONT to Tri-Cities TRI 

If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from Ontario ONT to Tri-Cities TRI on Travelocity starting at $309. Prices and availability subject to change. Additional terms may apply. 

Get to Tri-Cities TRI from Ontario ONT quicker with direct flights. 

Get to Tri-Cities faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to TRI from ONT to take around hour(s) min(s).  

Find our cheapest airfares for flights from Ontario ONT to Tri-Cities TRI

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to TRI from ONT. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.  

Get our best airfare deals for your flight from Ontario ONT to Tri-Cities TRI today 

If you’re flexible about when you travel, March is usually the cheapest month to fly from Ontario ONT to Tri-Cities TRI. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first. 

Book flexible airline tickets for flights to Tri-Cities TRI from Ontario ONT 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to TRI from ONT have this option.  

Travel with confidence when you book flights to Tri-Cities TRI from Ontario ONT with Travelocity 

We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving.