Cheap flights from Seattle, WA to Ontario, United States (SEA - ONT)

As a rule, buying flight tickets from Seattle, WA to Ontario expends a lot. Using our service of searching for cheap flight tickets, you will be able to save a significant sum of money! We will help tip to buy flight tickets from Seattle, WA to Ontario at the most favorable prices.

Out service helps you to find tickets from Seattle, WA to Ontario in the most reliable travel agencies and booking systems, including all the airline companies. We don't sell tickets and don't do any surcharges, we just find the best offers - you choose yourself where you want to buy flight tickets Seattle, WA - Ontario at the best price!

We also recommend you to look through the prices for return tickets from Ontario to Seattle, WA.

Airfares found by our users in the past 24 hours

The cheapest flight from Seattle, WA to Ontario is C$164 on Alaska Airlines, departing on 11.06.2025 and returning on 12.06.2025.
The price for these dates could change. Use search to get the best price.
AirlineDeparture dateReturn datePrice
Alaska Airlines11.06.202512.06.2025from C$164

Average round-trip airfares from Seattle, WA to Ontario by months

MonthRound-Trip
May 202518.05 - 24.05from C$200
June 202511.06 - 12.06from C$164
July 202524.07 - 02.08from C$224
August 202516.08 - 17.08from C$238
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The price which were found by our clients for the latest several days. Given ticket prices could change. It's connected with the presence of flight tickets while booking.

Airlines are flying from Seattle, WA to Ontario

Frontier Airlines
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