Cheap flights from Ontario to Seattle

1 adult
Wed 6/7
Wed 13/7

Flight information for Ontario to Seattle
(ONT to SEA)

Find info about flight duration, direct flights, and airports for your flight from Ontario to Seattle

Fastest flight time

2h 35m

Direct flights

Mon, Tue, Wed, Sat and Sun

Airports in Seattle

3 airports
The fastest flight from Ontario to Seattle takes 2h 35m
Direct flights go from Ontario to Seattle on Monday, Tuesday, Wednesday, Saturday and Sunday. The only airline offering direct flights is Alaska Airlines.
There are 3 airports near Seattle: Seattle King County/Boeing (BFI), Seattle Lake Union Spb (LKE), Seattle/Tacoma Intl (SEA)

How to get the cheapest flight ticket from Ontario to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly from Ontario to Seattle?


The cheapest time of year to fly to Seattle from Ontario is October. The most expensive is June.

How far in advance should you book Ontario to Seattle flights?

59 days before

The cheapest time to buy a flight from Ontario to Seattle is approximately 59 days to departure

  • How far is Ontario to Seattle/Tacoma Intl by plane?

    The straight-line distance from Ontario to Seattle/Tacoma Intl is 1555,6 km.

Why use momondo?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Seattle . Millions of users trust and use momondo every year so you are in good hands.

Yes. momondo allows you to filter the results for Ontario to Seattle flights to just show those with flexible booking policies.

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Seattle.

Yes. momondo can track prices for Ontario to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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