SEA

C$ 211 Find Cheap Flights from Ontario to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Seattle departing on 10/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Flight Deals

Cheap Flights from Ontario to Seattle

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Seattle

Tue, 25 Nov - Sat, 29 Nov
WestJet Logo
7:45 a.m. - 2:20 p.m.YYZ-SEA
9h 35m1 stop
WestJet Logo
3:20 p.m. - 5:58 a.m.SEA-YYZ
11h 38m2 stops
C$ 297WestJet
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Tue, 20 Jan - Fri, 30 Jan
WestJet Logo
7:45 a.m. - 2:20 p.m.YYZ-SEA
9h 35m1 stop
WestJet Logo
3:10 p.m. - 5:58 a.m.SEA-YYZ
11h 48m2 stops
C$ 299WestJet
Find Deal
Wed, 26 Nov - Wed, 3 Dec
Alaska Airlines Logo
4:45 p.m. - 7:17 p.m.YYZ-SEA
5h 32mdirect
Alaska Airlines Logo
7:55 a.m. - 3:35 p.m.SEA-YYZ
4h 40mdirect
C$ 311Alaska Airlines
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Tue, 25 Nov - Sat, 29 Nov
Multiple Airlines Logo
7:45 a.m. - 2:20 p.m.YYZ-SEA
9h 35m1 stop
Multiple Airlines Logo
7:57 a.m. - 3:35 p.m.SEA-YYZ
4h 38mdirect
C$ 321Multiple Airlines
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Tue, 25 Nov - Fri, 28 Nov
Multiple Airlines Logo
4:45 p.m. - 7:17 p.m.YYZ-SEA
5h 32mdirect
Multiple Airlines Logo
11:55 a.m. - 11:39 p.m.SEA-YYZ
8h 44m2 stops
C$ 331Multiple Airlines
Find Deal
Fri, 20 Feb - Sun, 22 Feb
Alaska Airlines Logo
4:45 p.m. - 7:05 p.m.YYZ-SEA
5h 20mdirect
Alaska Airlines Logo
8:00 a.m. - 3:35 p.m.SEA-YYZ
4h 35mdirect
C$ 334Alaska Airlines
Find Deal
Tue, 14 Apr - Wed, 15 Apr
Air Canada Logo
5:50 p.m. - 10:08 p.m.YOW-SEA
7h 18m1 stop
Air Canada Logo
8:00 p.m. - 6:43 a.m.SEA-YOW
7h 43m1 stop
C$ 339Air Canada
Find Deal
Tue, 14 Apr - Wed, 15 Apr
Air Canada Logo
5:50 p.m. - 10:08 p.m.YOW-SEA
7h 18m1 stop
Air Canada Logo
8:00 p.m. - 6:43 a.m.SEA-YOW
7h 43m1 stop
C$ 341Air Canada
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Wed, 26 Nov - Tue, 2 Dec
United Airlines Logo
5:55 p.m. - 12:59 a.m.YYZ-SEA
10h 04m1 stop
United Airlines Logo
1:40 p.m. - 11:59 p.m.SEA-YYZ
7h 19m1 stop
C$ 371United Airlines
Find Deal
Sat, 7 Feb - Sun, 22 Feb
United Airlines Logo
5:15 a.m. - 6:26 p.m.YXU-SEA
16h 11m2 stops
United Airlines Logo
11:59 p.m. - 9:21 p.m.SEA-YXU
18h 22m2 stops
C$ 438United Airlines
Find Deal

Everything you should know

Cheapest round-trip
C$ 297
Typical prices: C$ 369-C$ 722
WestJet
Tue 25/11Sat 29/11
YYZ - SEA • 1 stop
Cheapest direct flights
C$ 311
Typical prices: C$ 383-C$ 785
Alaska Airlines
Wed 26/11Wed 3/12
YYZ - SEA • Direct
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Useful Info

Good to know

Low seasonJanuary
Cheapest flightC$ 211
Best time to beat the crowds (10% less expensive on average)
Most popular time to fly and prices are also 1% lower on average.
Flight from Hamilton to Seattle

FAQs for booking flights from Ontario to Seattle

  • How does KAYAK find such low prices on flights from Ontario to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Lynnwood
Marysville
Tacoma
Centralia
Tukwila
Redmond
Renton
Kent
Bothell
Kirkland
Issaquah
Olympia
Ocean Shores
Ellensburg
Federal Way
Fife
Puyallup
Woodinville
Ashford

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

Seattle (SEA)

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