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Cheap Flights from Seattle to Ontario

Prices were available within the past 7 days and starts at $79 for one-way flights and $143 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Seattle to Ontario route information

Origin Airport Seattle - Tacoma Intl.
Destination Airport Los Angeles - Ontario Intl.
Airlines Serving Alaska Airlines, American Airlines, Delta, Frontier Airlines, United
Flight Price $143
Distance 956 mi

Cheap SEA to ONT Flights

Feb 17, 2020

Ontario airport is easy to navigate and quick!!

Feb 12, 2020

Me and my husband were assigned different seats and no chance to chose on return flight from SEA to ONT. That’s my only complaint

Feb 12, 2020

Good experience

Feb 6, 2020

All went smoothly

Jan 19, 2020

The flight crew was very pleasant😊

Jan 19, 2020

Greta crew. Very thoughtful and friendly. On time easy flight. Thank you.

Jan 14, 2020

Alaska Airlines, my new discovery!

Dec 30, 2019

When you notice a 7’ tall guy it would be great to get a emergency exit seat otherwise flight was a bit cramped but not your problem

Dec 22, 2019

Truthfully, this wasn’t the best Alaska flight we’ve been on, simply because of the delays that seemed to be no fault of their own. But they made up for us by giving us a free drink, which we were happy with.

Dec 19, 2019

This was the best flight experience I’ve ever had. Commendations to Yvonne for being so attentive in first class.