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.

C$ 296 CHEAP FLIGHTS from Ontario to Seattle

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Flight Deals

Cheap Flights from Ontario to Seattle

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Ontario to Seattle

Sat, 21 Nov - Sat, 28 Nov

7:30 a.m. - 1:40 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

9h 10m1 stop Calgary

2:20 p.m. - 5:45 a.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

12h 25m2 stops Calgary Edmonton

C$ 472WestJet

3+ days ago

Sun, 10 Jan - Fri, 15 Jan

7:30 a.m. - 1:40 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

9h 10m1 stop Calgary

2:30 p.m. - 5:45 a.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

12h 15m2 stops Calgary Edmonton

C$ 474WestJet

21 hours ago

Tue, 17 Nov - Thu, 26 Nov

6:10 a.m. - 1:40 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

10h 30m1 stop Calgary

9:53 p.m. - 6:51 a.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

29h 58m1 stop Las Vegas Harry Reid Intl

C$ 541Multiple Airlines

3+ days ago

Sun, 22 Nov - Thu, 26 Nov

7:30 a.m. - 1:40 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

9h 10m1 stop Calgary

9:53 p.m. - 6:51 a.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

29h 58m1 stop Las Vegas Harry Reid Intl

C$ 541Multiple Airlines

3+ days ago

Wed, 20 Jan - Tue, 26 Jan

12:23 p.m. - 7:28 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

10h 05m1 stop New York John F Kennedy Intl

11:13 p.m. - 11:20 a.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

9h 07m1 stop New York John F Kennedy Intl

C$ 565Delta

23 hours ago

Wed, 2 Dec - Wed, 9 Dec

5:15 p.m. - 11:53 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

9h 38m1 stop Minneapolis St Paul

1:36 p.m. - 11:07 p.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

6h 31m1 stop Detroit Metropolitan Wayne County

C$ 566Delta

2 days ago

Sun, 22 Nov - Tue, 1 Dec

7:50 a.m. - 6:22 p.m.Ottawa Ottawa-Seattle Seattle/Tacoma Intl

13h 32m2 stops Calgary Vancouver Intl

10:10 a.m. - 12:26 a.m.Seattle Seattle/Tacoma Intl-Ottawa Ottawa

11h 16m2 stops Vancouver Intl Calgary

C$ 586Air Canada

18 hours ago

Sun, 22 Nov - Tue, 1 Dec

7:50 a.m. - 6:22 p.m.Ottawa Ottawa-Seattle Seattle/Tacoma Intl

13h 32m2 stops Calgary Vancouver Intl

7:45 a.m. - 7:30 p.m.Seattle Seattle/Tacoma Intl-Ottawa Ottawa

8h 45m1 stop Toronto Pearson Intl

C$ 597Air Canada

18 hours ago

Sat, 12 Dec - Mon, 4 Jan

6:15 a.m. - 4:18 p.m.Ottawa Ottawa-Seattle Seattle/Tacoma Intl

13h 03m1 stop Chicago O'Hare Intl

7:10 p.m. - 3:07 p.m.Seattle Seattle/Tacoma Intl-Ottawa Ottawa

16h 57m2 stops Denver Intl Washington, D.C. Dulles Intl

C$ 624United Airlines

19 hours ago

Sat, 12 Dec - Mon, 4 Jan

9:45 a.m. - 9:21 p.m.Ottawa Ottawa-Seattle Seattle/Tacoma Intl

14h 36m2 stops Washington, D.C. Dulles Intl Denver Intl

7:25 p.m. - 2:09 p.m.Seattle Seattle/Tacoma Intl-Ottawa Ottawa

15h 44m2 stops San Francisco Chicago O'Hare Intl

C$ 624United Airlines

19 hours ago

Recent last minute flight deals from Ontario to Seattle

Mon, 2 Nov - Mon, 9 Nov

5:10 p.m. - 1:40 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

23h 30m1 stop Calgary

2:30 p.m. - 1:05 p.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

19h 35m1 stop Calgary

C$ 814WestJet

21 hours ago

Fri, 30 Oct - Mon, 16 Nov

5:15 p.m. - 7:43 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

5h 28mdirect

2:30 p.m. - 5:45 a.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

12h 15m2 stops Calgary Edmonton

C$ 942Multiple Airlines

3+ days ago

Mon, 2 Nov - Mon, 9 Nov

7:00 p.m. - 1:40 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

21h 40m1 stop Calgary

2:30 p.m. - 7:50 a.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

14h 20m2 stops Calgary Vancouver Intl

C$ 946Multiple Airlines

21 hours ago

Fri, 30 Oct - Mon, 16 Nov

6:10 a.m. - 5:00 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

13h 50m2 stops Calgary Vancouver Intl

2:30 p.m. - 5:45 a.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

12h 15m2 stops Calgary Edmonton

C$ 991WestJet

3+ days ago

Mon, 2 Nov - Fri, 6 Nov

5:15 p.m. - 7:45 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

5h 30mdirect

11:42 p.m. - 10:50 a.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

8h 08m1 stop Chicago O'Hare Intl

C$ 1,004Alaska Airlines

3+ days ago

Mon, 2 Nov - Fri, 6 Nov

2:01 p.m. - 10:00 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

10h 59m1 stop Dallas/Fort Worth

11:42 p.m. - 10:50 a.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

8h 08m1 stop Chicago O'Hare Intl

C$ 1,004Alaska Airlines

3+ days ago

Mon, 2 Nov - Mon, 9 Nov

8:35 a.m. - 6:33 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

12h 58m2 stops Chicago O'Hare Intl San Francisco

5:05 a.m. - 9:15 p.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

13h 10m2 stops Denver Intl Chicago O'Hare Intl

C$ 1,011United Airlines

21 hours ago

Mon, 2 Nov - Mon, 9 Nov

2:45 p.m. - 8:56 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

9h 11m1 stop Washington, D.C. Dulles Intl

9:05 a.m. - 12:29 a.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

12h 24m1 stop San Francisco

C$ 1,124United Airlines

3+ days ago

Fri, 30 Oct - Mon, 16 Nov

11:38 a.m. - 7:04 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

10h 26m1 stop Atlanta Hartsfield-Jackson

11:40 p.m. - 11:09 a.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

8h 29m1 stop Atlanta Hartsfield-Jackson

C$ 1,146Delta

17 hours ago

Mon, 2 Nov - Sun, 8 Nov

5:49 p.m. - 10:05 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

7h 16m1 stop Salt Lake City

1:42 p.m. - 11:15 p.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

6h 33m1 stop Minneapolis St Paul

C$ 1,149Delta

3+ days ago

Recent direct flight deals from Ontario to Seattle

Tue, 8 Dec - Tue, 15 Dec

5:15 p.m. - 7:56 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

5h 41mdirect

8:33 a.m. - 4:05 p.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

4h 32mdirect

C$ 664Alaska Airlines

3+ days ago

Mon, 7 Dec - Mon, 14 Dec

5:15 p.m. - 7:56 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

5h 41mdirect

8:33 a.m. - 4:05 p.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

4h 32mdirect

C$ 683Alaska Airlines

3+ days ago

Sat, 21 Nov - Sat, 28 Nov

5:15 p.m. - 7:47 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

5h 32mdirect

8:31 a.m. - 4:05 p.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

4h 34mdirect

C$ 687Alaska Airlines

3+ days ago

Sat, 21 Nov - Sat, 28 Nov

6:25 p.m. - 8:59 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

5h 34mdirect

8:31 a.m. - 4:05 p.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

4h 34mdirect

C$ 772Multiple Airlines

3+ days ago

Sat, 28 Nov - Sat, 5 Dec

6:25 p.m. - 8:59 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

5h 34mdirect

7:45 a.m. - 3:25 p.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

4h 40mdirect

C$ 776Air Canada

1 day ago

Sat, 28 Nov - Sat, 5 Dec

6:25 p.m. - 8:59 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

5h 34mdirect

7:45 a.m. - 3:25 p.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

4h 40mdirect

C$ 778Air Canada

1 day ago

Mon, 23 Nov - Mon, 30 Nov

6:25 p.m. - 8:59 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

5h 34mdirect

7:45 a.m. - 3:25 p.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

4h 40mdirect

C$ 897United Airlines

16 hours ago

Thu, 28 Jan - Sun, 7 Feb

6:25 p.m. - 8:59 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

5h 34mdirect

7:45 a.m. - 3:25 p.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

4h 40mdirect

C$ 1,065Multiple Airlines

3+ days ago

Fri, 13 Nov - Mon, 16 Nov

6:25 p.m. - 8:59 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

5h 34mdirect

7:45 a.m. - 3:25 p.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

4h 40mdirect

C$ 1,090Multiple Airlines

2 days ago

Fri, 25 Dec - Fri, 1 Jan

6:25 p.m. - 8:59 p.m.Toronto Toronto Pearson Intl-Seattle Seattle/Tacoma Intl

5h 34mdirect

7:45 a.m. - 3:25 p.m.Seattle Seattle/Tacoma Intl-Toronto Toronto Pearson Intl

4h 40mdirect

C$ 1,142United Airlines

3+ days ago

Useful Info

Low season	January
High season	July
Cheapest flight	C$ 296

Best time to beat the crowds (21% less expensive on average)

Most popular time to fly (28% more expensive on average)

Flight from Ottawa 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.

SeaTac

Lynnwood

Tacoma

Marysville

Centralia

Tukwila

Redmond

Renton

Kent

Ashford

Bothell

Kirkland

Olympia

Ocean Shores

Puyallup

Issaquah

Federal Way

Ellensburg

Woodinville

Gig Harbor

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C$ 296 Find Cheap Flights from Ontario to Seattle – Compare and Save

Cheap Flights from Ontario to Seattle

Recent round-trip flight deals from Ontario to Seattle

Recent one-way flight deals from Ontario to Seattle

Recent last minute flight deals from Ontario to Seattle

Recent direct flight deals from Ontario to Seattle

Good to know

Low season

High season

Cheapest flight

FAQs for booking flights from Ontario to Seattle

Travelling to a place near Seattle?

More options for your flight to Seattle

Complete your trip to Seattle with a hotel stay or car rental

Information on the airport you'll fly into in Seattle

Cabin class types available on flights to Ontario

Find direct flights for Seattle

Flights from domestic origins to Seattle

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Find deals for your return flight