SEA

C$ 174 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 25/10. 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

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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, 21 Oct - Fri, 24 Oct
WestJet Logo
6:00 a.m. - 12:59 p.m.YHM-SEA
9h 59m1 stop
WestJet Logo
1:50 p.m. - 12:40 a.m.SEA-YHM
7h 50m1 stop
C$ 282WestJet
Find Deal
Thu, 23 Oct - Fri, 24 Oct
WestJet Logo
6:00 a.m. - 12:59 p.m.YHM-SEA
9h 59m1 stop
WestJet Logo
1:50 p.m. - 12:40 a.m.SEA-YHM
7h 50m1 stop
C$ 296WestJet
Find Deal
Tue, 3 Mar - Thu, 5 Mar
Air Canada Logo
9:45 a.m. - 7:16 p.m.YQG-SEA
12h 31m2 stops
Air Canada Logo
8:15 a.m. - 7:14 p.m.SEA-YQG
7h 59m1 stop
C$ 307Air Canada
Find Deal
Wed, 12 Nov - Thu, 20 Nov
Air Canada Logo
10:00 a.m. - 2:31 p.m.YYZ-SEA
7h 31m1 stop
Air Canada Logo
8:00 p.m. - 6:29 a.m.SEA-YYZ
7h 29m1 stop
C$ 316Air Canada
Find Deal
Tue, 21 Oct - Fri, 24 Oct
Logo
8:00 a.m. - 12:59 p.m.YYZ-SEA
7h 59m1 stop
Logo
7:18 a.m. - 3:00 p.m.SEA-YYZ
4h 42mdirect
C$ 321
Find Deal
Thu, 13 Nov - Wed, 19 Nov
Logo
7:45 a.m. - 2:20 p.m.YYZ-SEA
9h 35m1 stop
Logo
7:55 a.m. - 3:35 p.m.SEA-YYZ
4h 40mdirect
C$ 325
Find Deal
Tue, 28 Oct - Tue, 4 Nov
United Airlines Logo
5:30 p.m. - 10:45 p.m.YYZ-SEA
8h 15m1 stop
United Airlines Logo
11:50 p.m. - 1:43 p.m.SEA-YYZ
10h 53m1 stop
C$ 335United Airlines
Find Deal
Sat, 15 Nov - Sun, 16 Nov
Alaska Airlines Logo
4:45 p.m. - 7:05 p.m.YYZ-SEA
5h 20mdirect
Alaska Airlines Logo
7:55 a.m. - 3:35 p.m.SEA-YYZ
4h 40mdirect
C$ 339Alaska Airlines
Find Deal
Thu, 13 Nov - Mon, 17 Nov
Alaska Airlines Logo
4:45 p.m. - 7:05 p.m.YYZ-SEA
5h 20mdirect
Alaska Airlines Logo
7:55 a.m. - 3:35 p.m.SEA-YYZ
4h 40mdirect
C$ 349Alaska Airlines
Find Deal
Fri, 17 Oct - Mon, 20 Oct
United Airlines Logo
9:00 a.m. - 3:45 p.m.YYZ-SEA
9h 45m1 stop
United Airlines Logo
5:00 a.m. - 10:48 p.m.SEA-YYZ
14h 48m1 stop
C$ 356United Airlines
Find Deal

Everything you should know

Cheapest round-trip
C$ 282
WestJet
Tue 21/10Fri 24/10
YHM - SEA • 1 stop
Cheapest direct flights
C$ 327
Typical prices: C$ 367-689
Alaska Airlines
Tue 11/11Tue 18/11
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!
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Good to know

Low seasonJanuary
Cheapest flightC$ 174
Best time to beat the crowds (13% less expensive on average)
Most popular time to fly and prices are also 2% 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
Tukwila
Centralia
Renton
Redmond
Kent
Olympia
Bothell
Issaquah
Ellensburg
Kirkland
Ocean Shores
Federal Way
Fife
Woodinville
Aberdeen
Snoqualmie

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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