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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

C$ 116 CHEAP FLIGHTS from Ontario to Seattle

SEA

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Cheap Flight Deals 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.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Ontario to Seattle

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ontario to Seattle.

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

Choose your dates

6:00 a.m. - 12:58 p.m.YKF-SEA

9h 58m1 stop

1:50 p.m. - 12:46 a.m.SEA-YKF

7h 56m1 stop

C$ 194WestJet

Find Deal

Wed, 21 May - Wed, 28 May

6:00 a.m. - 12:58 p.m.YKF-SEA

9h 58m1 stop

1:50 p.m. - 12:46 a.m.SEA-YKF

7h 56m1 stop

C$ 205WestJet

Find Deal

Tue, 6 May - Fri, 9 May

6:00 a.m. - 12:58 p.m.YHM-SEA

9h 58m1 stop

6:00 a.m. - 12:41 a.m.SEA-YHM

15h 41m2 stops

C$ 294

Find Deal

Tue, 6 May - Tue, 13 May

9:05 a.m. - 2:13 p.m.YYZ-SEA

8h 08m1 stop

7:20 a.m. - 7:48 p.m.SEA-YYZ

9h 28m1 stop

C$ 335Air Canada

Find Deal

Tue, 10 Jun - Sat, 14 Jun

6:15 a.m. - 10:45 a.m.YXU-SEA

7h 30m1 stop

7:20 a.m. - 9:18 a.m.SEA-YXU

22h 58m2 stops

C$ 351Air Canada

Find Deal

Fri, 23 May - Mon, 26 May

9:00 a.m. - 7:10 p.m.YYZ-SEA

13h 10m2 stops

6:00 a.m. - 12:12 a.m.SEA-YYZ

15h 12m1 stop

C$ 355

Find Deal

Tue, 6 May - Tue, 13 May

12:31 p.m. - 8:32 p.m.YYZ-SEA

11h 01m1 stop

12:40 a.m. - 11:29 a.m.SEA-YYZ

7h 49m1 stop

C$ 390Delta

Find Deal

Wed, 17 Sep - Thu, 25 Sep

5:50 p.m. - 10:25 p.m.YYZ-SEA

7h 35m1 stop

9:58 p.m. - 11:20 a.m.SEA-YYZ

10h 22m1 stop

C$ 401Delta

Find Deal

Thu, 12 Jun - Sun, 15 Jun

4:45 p.m. - 7:04 p.m.YYZ-SEA

5h 19mdirect

7:23 a.m. - 3:00 p.m.SEA-YYZ

4h 37mdirect

C$ 427Alaska Airlines

Find Deal

Fri, 6 Jun - Sun, 8 Jun

4:45 p.m. - 7:04 p.m.YYZ-SEA

5h 19mdirect

7:23 a.m. - 3:00 p.m.SEA-YYZ

4h 37mdirect

C$ 429Alaska Airlines

Find Deal

Fri, 6 Jun - Sun, 8 Jun

Low season	February
High season	August
Cheapest flight	C$ 116

Best time to beat the crowds (7% less expensive on average)

Most popular time to fly and prices are also 7% lower on average.

Flight from Toronto Region of Waterloo Intl 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.

See more FAQs

SeaTac

Lynnwood

Marysville

Tacoma

Tukwila

Centralia

Kent

Olympia

Renton

Ocean Shores

Bothell

Issaquah

Federal Way

Ellensburg

Kirkland

Shoreline

Edmonds

Ashford

Woodinville

Mukilteo

Everything you need to know for your flight to Seattle

SEA

C$ 116 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 31/8. 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.

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

Cheap Flight Deals 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

How does KAYAK find such low prices 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?

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

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

Travelling to a place near Seattle?

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

Cabin class types available on flights to Ontario

Cabin classes available on flights to Seattle. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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

Find direct flights for Seattle

Flights to other popular destinations

The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.

Flights from domestic origins to Seattle

Flights from all regions of Ontario to Seattle. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Choose which airport to fly into in Seattle

Find deals for your return flight