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$ 233 CHEAP FLIGHTS from Ontario to Seattle

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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

Thu, 1 Oct - Wed, 7 Oct

1:20 p.m. - 6:45 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

8h 25m1 stop Calgary

7:35 p.m. - 5:35 a.m.SEA Seattle/Tacoma Intl-YOW Ottawa

7h 00m1 stop Calgary

C$ 353WestJet

Thu, 1 Oct - Wed, 7 Oct

6:55 a.m. - 6:45 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

14h 50m2 stops Toronto Pearson Intl Calgary

7:35 p.m. - 5:35 a.m.SEA Seattle/Tacoma Intl-YOW Ottawa

7h 00m1 stop Calgary

C$ 370WestJet

Fri, 8 Jan - Sat, 16 Jan

7:30 a.m. - 2:37 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

10h 07m1 stop Vancouver Intl

8:15 a.m. - 8:33 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

9h 18m1 stop Vancouver Intl

C$ 441Air Canada

Sun, 14 Feb - Wed, 17 Feb

1:10 p.m. - 8:59 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

10h 49m1 stop Toronto Pearson Intl

8:15 a.m. - 8:33 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

9h 18m1 stop Vancouver Intl

C$ 470Air Canada

Fri, 2 Oct - Sun, 11 Oct

8:20 a.m. - 6:45 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

13h 25m3 stops Winnipeg Edmonton Calgary

10:30 a.m. - 10:45 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

9h 15m1 stop Calgary

C$ 499Multiple Airlines

Sat, 24 Oct - Sat, 31 Oct

4:55 p.m. - 7:26 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 31mdirect

8:20 a.m. - 4:05 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 45mdirect

C$ 520Alaska Airlines

Fri, 2 Oct - Sun, 11 Oct

6:45 p.m. - 9:04 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 19mdirect

10:30 a.m. - 10:45 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

9h 15m1 stop Calgary

C$ 535Multiple Airlines

Wed, 20 Jan - Tue, 26 Jan

7:00 a.m. - 8:48 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

16h 48m2 stops Newark San Francisco

8:00 a.m. - 7:38 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

8h 38m1 stop Washington, D.C. Dulles Intl

C$ 539United Airlines

Wed, 20 Jan - Tue, 26 Jan

7:00 a.m. - 6:09 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

14h 09m2 stops Newark Denver Intl

5:07 a.m. - 9:17 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

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

C$ 539United Airlines

Sat, 24 Oct - Sat, 31 Oct

4:55 p.m. - 7:26 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 31mdirect

8:20 a.m. - 4:05 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 45mdirect

C$ 563Alaska Airlines

Recent last minute flight deals from Ontario to Seattle

Tue, 15 Sep - Tue, 22 Sep

8:00 p.m. - 9:40 a.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

16h 40m1 stop Calgary

7:35 p.m. - 7:05 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

8h 30m1 stop Calgary

C$ 443WestJet

Sat, 12 Sep - Fri, 18 Sep

7:15 a.m. - 6:45 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

14h 30m1 stop Calgary

7:35 p.m. - 7:05 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

8h 30m1 stop Calgary

C$ 444WestJet

Fri, 11 Sep - Fri, 18 Sep

1:30 p.m. - 6:45 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

8h 15m1 stop Calgary

7:35 p.m. - 6:40 a.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

8h 05m1 stop Calgary

C$ 599Multiple Airlines

Fri, 11 Sep - Thu, 17 Sep

7:00 a.m. - 6:45 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

14h 45m3 stops Winnipeg Edmonton Calgary

10:30 a.m. - 12:55 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

23h 25m1 stop Calgary

C$ 600Multiple Airlines

Tue, 15 Sep - Tue, 22 Sep

7:30 a.m. - 2:17 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

9h 47m1 stop Vancouver Intl

3:00 p.m. - 7:10 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

13h 10m2 stops Vancouver Intl Calgary

C$ 658Air Canada

Tue, 15 Sep - Tue, 22 Sep

9:45 a.m. - 5:52 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

11h 07m2 stops Chicago O'Hare Intl Denver Intl

7:00 a.m. - 10:06 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

12h 06m2 stops Houston George Bush Intcntl Newark

C$ 665United Airlines

Tue, 15 Sep - Tue, 22 Sep

6:10 a.m. - 7:15 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

16h 05m1 stop Chicago O'Hare Intl

5:20 p.m. - 8:16 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

11h 56m1 stop San Francisco

C$ 665United Airlines

Tue, 15 Sep - Tue, 22 Sep

1:10 p.m. - 9:39 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

11h 29m2 stops Ottawa Toronto Pearson Intl

3:00 p.m. - 7:10 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

13h 10m2 stops Vancouver Intl Calgary

C$ 669Air Canada

Tue, 15 Sep - Thu, 24 Sep

12:25 p.m. - 8:36 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

11h 11m1 stop Minneapolis St Paul

8:59 a.m. - 11:59 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

12h 00m1 stop Atlanta Hartsfield-Jackson

C$ 731Delta

Tue, 15 Sep - Sat, 19 Sep

7:24 p.m. - 11:55 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

7h 31m1 stop Minneapolis St Paul

6:00 a.m. - 3:15 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

6h 15m1 stop Detroit Metropolitan Wayne County

C$ 836Delta

Recent direct flight deals from Ontario to Seattle

Fri, 30 Oct - Sun, 1 Nov

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

5h 34mdirect

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

4h 40mdirect

C$ 503Air Canada

Sat, 10 Oct - Sun, 18 Oct

6:45 p.m. - 9:04 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 19mdirect

7:55 a.m. - 3:36 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 41mdirect

C$ 503Air Canada

Thu, 22 Oct - Thu, 29 Oct

6:45 p.m. - 9:04 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 19mdirect

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

4h 40mdirect

C$ 503Air Canada

Sat, 24 Oct - Sat, 31 Oct

4:55 p.m. - 7:26 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 31mdirect

8:20 a.m. - 4:05 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 45mdirect

C$ 520Alaska Airlines

Sat, 24 Oct - Sat, 31 Oct

4:55 p.m. - 7:26 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 31mdirect

8:20 a.m. - 4:05 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 45mdirect

C$ 563Alaska Airlines

Sat, 24 Oct - Sat, 31 Oct

4:55 p.m. - 7:26 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 31mdirect

8:20 a.m. - 4:05 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 45mdirect

C$ 567Alaska Airlines

Sat, 24 Oct - Sat, 31 Oct

7:20 p.m. - 9:39 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 19mdirect

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

4h 40mdirect

C$ 723United Airlines

Sat, 24 Oct - Sat, 31 Oct

7:20 p.m. - 9:39 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 19mdirect

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

4h 40mdirect

C$ 724United Airlines

Sun, 15 Nov - Fri, 20 Nov

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

5h 34mdirect

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

4h 34mdirect

C$ 732Multiple Airlines

Thu, 8 Oct - Mon, 12 Oct

6:45 p.m. - 9:04 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 19mdirect

8:00 a.m. - 3:45 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 45mdirect

C$ 764Multiple Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	C$ 233

Best time to beat the crowds (19% less expensive on average)

Most popular time to fly (41% 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

Bothell

Ashford

Kirkland

Kent

Olympia

Issaquah

Ocean Shores

Puyallup

Federal Way

Ellensburg

Gig Harbor

Lacey

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C$ 233 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

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Find direct flights for Seattle

Flights from domestic origins to Seattle

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