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Cheap flights from Seattle to Toronto from C$ 193

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Toronto departing on 20/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Seattle to Toronto

Cheap round-trip flights

WestJet Logo
1:50 p.m. - 12:46 a.m.SEA-YKF
7h 56m1 stop
WestJet Logo
6:00 a.m. - 12:58 p.m.YKF-SEA
9h 58m1 stop
C$ 417WestJet
Find Deal
Wed, 27 Aug - Thu, 28 Aug
WestJet Logo
7:05 a.m. - 6:56 p.m.SEA-YKF
8h 51m1 stop
WestJet Logo
6:00 a.m. - 12:58 p.m.YKF-SEA
9h 58m1 stop
C$ 418WestJet
Find Deal
Tue, 26 Aug - Sun, 31 Aug
Logo
1:50 p.m. - 5:30 a.m.SEA-YKF
12h 40m2 stops
Logo
6:30 a.m. - 8:29 p.m.YKF-SEA
16h 59m2 stops
C$ 437
Find Deal
Sat, 20 Sep - Wed, 24 Sep
Logo
1:50 p.m. - 5:30 a.m.SEA-YKF
12h 40m2 stops
Logo
6:15 a.m. - 12:33 p.m.YKF-SEA
9h 18m1 stop
C$ 447
Find Deal
Thu, 11 Sep - Sun, 14 Sep
WestJet Logo
7:05 a.m. - 12:46 a.m.SEA-YKF
14h 41m1 stop
WestJet Logo
6:00 a.m. - 12:58 p.m.YKF-SEA
9h 58m1 stop
C$ 448WestJet
Find Deal
Sat, 23 Aug - Thu, 28 Aug
WestJet Logo
2:05 p.m. - 12:46 a.m.SEA-YKF
7h 41m1 stop
WestJet Logo
6:00 a.m. - 4:16 p.m.YKF-SEA
13h 16m1 stop
C$ 455WestJet
Find Deal
Tue, 19 Aug - Sat, 23 Aug
WestJet Logo
7:35 p.m. - 12:46 a.m.SEA-YKF
26h 11m1 stop
WestJet Logo
6:00 a.m. - 12:58 p.m.YKF-SEA
9h 58m1 stop
C$ 457WestJet
Find Deal
Fri, 22 Aug - Sun, 24 Aug
Logo
1:50 p.m. - 5:30 a.m.SEA-YKF
12h 40m2 stops
Logo
6:15 a.m. - 12:33 p.m.YKF-SEA
9h 18m1 stop
C$ 461
Find Deal
Thu, 11 Sep - Sun, 14 Sep
Logo
1:15 p.m. - 5:15 a.m.SEA-YKF
13h 00m2 stops
Logo
6:00 a.m. - 8:29 p.m.YKF-SEA
17h 29m1 stop
C$ 468
Find Deal
Fri, 12 Sep - Fri, 19 Sep
WestJet Logo
7:05 a.m. - 12:46 a.m.SEA-YKF
14h 41m1 stop
WestJet Logo
6:00 a.m. - 12:58 p.m.YKF-SEA
9h 58m1 stop
C$ 477WestJet
Find Deal
Sat, 23 Aug - Wed, 27 Aug

WestJet flights from Seattle to Toronto Region of Waterloo Intl Airport

Our best WestJet deals on Seattle to Toronto Region of Waterloo Intl Airport flight tickets
WestJet
27 Aug
SEA1:50 p.m.Seattle/Tacoma Intl
7h 56m
1 stop
YKF12:46 a.m.Toronto Region of Waterloo Intl
28 Aug
YKF6:00 a.m.Toronto Region of Waterloo Intl
9h 58m
1 stop
SEA12:58 p.m.Seattle/Tacoma Intl
C$ 417
Find similar
WestJet
26 Aug
SEA7:05 a.m.Seattle/Tacoma Intl
8h 51m
1 stop
YKF6:56 p.m.Toronto Region of Waterloo Intl
31 Aug
YKF6:00 a.m.Toronto Region of Waterloo Intl
9h 58m
1 stop
SEA12:58 p.m.Seattle/Tacoma Intl
C$ 418
Find similar
WestJet
23 Aug
SEA7:05 a.m.Seattle/Tacoma Intl
14h 41m
1 stop
YKF12:46 a.m.Toronto Region of Waterloo Intl
28 Aug
YKF6:00 a.m.Toronto Region of Waterloo Intl
9h 58m
1 stop
SEA12:58 p.m.Seattle/Tacoma Intl
C$ 448
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Toronto Region of Waterloo Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 96,600 searches. Data last updated 31 July 2025.
Use the filters below to find and compare flights from Seattle to Toronto Region of Waterloo Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Wed 27/8

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

1 stop7h 56m

Toronto Region of Waterloo Intl

Thu 28/8

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

1 stop9h 58m

C$ 417

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Tue 26/8

7:05 a.m.-6:56 p.m.

1 stop8h 51m

Toronto Region of Waterloo Intl

Sun 31/8

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

1 stop9h 58m

C$ 418

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Sat 20/9

1:50 p.m.-5:30 a.m.

2 stops12h 40m

Toronto Region of Waterloo Intl

Wed 24/9

6:30 a.m.-8:29 p.m.

2 stops16h 59m

C$ 437

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Thu 11/9

1:50 p.m.-5:30 a.m.

2 stops12h 40m

Toronto Region of Waterloo Intl

Sun 14/9

6:15 a.m.-12:33 p.m.

1 stop9h 18m

C$ 447

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Sat 23/8

7:05 a.m.-12:46 a.m.

1 stop14h 41m

Toronto Region of Waterloo Intl

Thu 28/8

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

1 stop9h 58m

C$ 448

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Tue 19/8

2:05 p.m.-12:46 a.m.

1 stop7h 41m

Toronto Region of Waterloo Intl

Sat 23/8

6:00 a.m.-4:16 p.m.

1 stop13h 16m

C$ 455

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Fri 22/8

7:35 p.m.-12:46 a.m.

1 stop26h 11m

Toronto Region of Waterloo Intl

Sun 24/8

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

1 stop9h 58m

C$ 457

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Thu 11/9

1:50 p.m.-5:30 a.m.

2 stops12h 40m

Toronto Region of Waterloo Intl

Sun 14/9

6:15 a.m.-12:33 p.m.

1 stop9h 18m

C$ 461

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Fri 12/9

1:15 p.m.-5:15 a.m.

2 stops13h 00m

Toronto Region of Waterloo Intl

Fri 19/9

6:00 a.m.-8:29 p.m.

1 stop17h 29m

C$ 468

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Sat 23/8

7:05 a.m.-12:46 a.m.

1 stop14h 41m

Toronto Region of Waterloo Intl

Wed 27/8

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

1 stop9h 58m

C$ 477

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Seattle to Toronto Region of Waterloo Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Seattle/Tacoma Intl to Toronto Region of Waterloo Intl?

WestJet is the most popular carrier operating from Seattle/Tacoma Intl to Toronto Region of Waterloo Intl

When to book flights from Seattle to Toronto Region of Waterloo Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Toronto Region of Waterloo Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Toronto Region of Waterloo Intl Airport (SEA to YKF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Toronto Region of Waterloo Intl Airport

Best price found

C$ 193

Fastest flight time

7h 40m

Direct flights

None
The best one-way flight to Toronto Region of Waterloo Intl Airport from Seattle in the past 72 hours is C$ 193. The best round-trip flight deal from Seattle to Toronto Region of Waterloo Intl Airport found on momondo in the last 72 hours is C$ 417.
The fastest flight from Seattle to Toronto Region of Waterloo Intl Airport takes 7h 40m
There are no direct flights from Seattle to Toronto Region of Waterloo Intl Airport. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - Toronto Region of Waterloo Intl Airport.
Search flight deals

  • How far is Seattle/Tacoma Intl to Toronto Region of Waterloo Intl by plane?

    The distance between Seattle/Tacoma Intl and Toronto Region of Waterloo Intl is about 3257.4 km. A reasonable flight in good conditions will take 7h 41m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Toronto Region of Waterloo Intl Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Toronto Region of Waterloo Intl Airport refresh daily.

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Toronto Region of Waterloo Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Toronto Region of Waterloo Intl Airport.

  • What documentation or ID do you need to fly to Toronto Region of Waterloo Intl Airport?

    The travel and health documents required for your trip to Toronto Region of Waterloo Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Toronto Region of Waterloo Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Travelling to a place near Toronto?

Book flights to Toronto if you plan to visit one of these locations
Sauble Beach
Port Elgin
Southampton
Apsley

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Toronto?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Toronto for you.

Can I find flights from Seattle to Toronto with flexible booking policies on momondo?

All flight searches from Seattle to Toronto on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Seattle to Toronto?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Toronto from Seattle.

I’m not ready to book a flight from Seattle to Toronto right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Toronto now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Toronto and let you know when they change.

An easier way to manage your Toronto Region of Waterloo Intl Airport trip

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