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Cheap flights from Seattle to Toronto from C$ 316

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 10/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Find the cheapest flights from Seattle to Toronto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
5:45 a.m. - 6:22 p.m.
SEA
-
YTZ
9h 37m
2 stops
Air Canada Logo
6:55 p.m. - 10:05 a.m.
YTZ
-
SEA
18h 10m
2 stops
C$ 592Air Canada
Sat, 6 Jun - Sun, 7 Jun
United Airlines Logo
8:00 a.m. - 6:42 p.m.
SEA
-
YTZ
7h 42m
1 stop
United Airlines Logo
12:15 p.m. - 7:05 p.m.
YTZ
-
SEA
9h 50m
1 stop
C$ 669United Airlines
Tue, 2 Jun - Sat, 6 Jun
Air Canada Logo
10:45 a.m. - 7:52 a.m.
SEA
-
YTZ
18h 07m
2 stops
Air Canada Logo
3:35 p.m. - 10:40 p.m.
YTZ
-
SEA
10h 05m
2 stops
C$ 684Air Canada
Tue, 9 Jun - Mon, 15 Jun
Air Canada Logo
3:00 p.m. - 7:45 a.m.
SEA
-
YTZ
13h 45m
2 stops
Air Canada Logo
12:30 p.m. - 10:48 p.m.
YTZ
-
SEA
13h 18m
2 stops
C$ 693Air Canada
Sat, 22 Aug - Tue, 25 Aug
United Airlines Logo
10:40 p.m. - 10:06 a.m.
SEA
-
YTZ
8h 26m
1 stop
United Airlines Logo
2:55 p.m. - 8:46 p.m.
YTZ
-
SEA
8h 51m
1 stop
C$ 700United Airlines
Fri, 5 Jun - Tue, 9 Jun
Multiple Airlines Logo
11:30 p.m. - 1:00 p.m.
SEA
-
YTZ
10h 30m
1 stop
Multiple Airlines Logo
11:55 a.m. - 9:00 p.m.
YTZ
-
SEA
12h 05m
2 stops
C$ 711Multiple Airlines
Fri, 5 Jun - Mon, 15 Jun
United Airlines Logo
10:40 p.m. - 10:06 a.m.
SEA
-
YTZ
8h 26m
1 stop
United Airlines Logo
12:15 p.m. - 7:05 p.m.
YTZ
-
SEA
9h 50m
1 stop
C$ 714United Airlines
Fri, 5 Jun - Mon, 8 Jun
Multiple Airlines Logo
3:53 p.m. - 5:35 p.m.
SEA
-
YTZ
22h 42m
1 stop
Multiple Airlines Logo
11:55 a.m. - 9:40 a.m.
YTZ
-
SEA
24h 45m
2 stops
C$ 722Multiple Airlines
Tue, 9 Jun - Mon, 15 Jun
Multiple Airlines Logo
3:53 p.m. - 5:35 p.m.
SEA
-
YTZ
22h 42m
1 stop
Multiple Airlines Logo
11:55 a.m. - 9:00 p.m.
YTZ
-
SEA
12h 05m
2 stops
C$ 723Multiple Airlines
Tue, 9 Jun - Mon, 15 Jun
Air Canada Logo
7:20 p.m. - 7:45 a.m.
SEA
-
YTZ
9h 25m
2 stops
Air Canada Logo
10:45 a.m. - 10:07 a.m.
YTZ
-
SEA
26h 22m
2 stops
C$ 734Air Canada
Sat, 8 Aug - Tue, 11 Aug

Air Canada flights from Seattle to Toronto Island Airport

Our best Air Canada deals on Seattle to Toronto Island Airport flight tickets
Air Canada
6 Jun
SEA7:20 p.m.Seattle/Tacoma Intl
12h 37m
2 stops
YTZ10:57 a.m.Toronto Island
12 Jun
YTZ12:15 p.m.Toronto Island
9h 50m
1 stop
SEA7:05 p.m.Seattle/Tacoma Intl
C$ 494
Air Canada
6 Jun
SEA5:45 a.m.Seattle/Tacoma Intl
9h 37m
2 stops
YTZ6:22 p.m.Toronto Island
12 Jun
YTZ8:55 p.m.Toronto Island
16h 10m
2 stops
SEA10:05 a.m.Seattle/Tacoma Intl
C$ 536
Air Canada
6 Jun
SEA5:45 a.m.Seattle/Tacoma Intl
9h 37m
2 stops
YTZ6:22 p.m.Toronto Island
7 Jun
YTZ6:55 p.m.Toronto Island
18h 10m
2 stops
SEA10:05 a.m.Seattle/Tacoma Intl
C$ 592

United Airlines flights from Seattle to Toronto Island Airport

Our best United Airlines deals on Seattle to Toronto Island Airport flight tickets
United Airlines
9 Jun
SEA8:00 a.m.Seattle/Tacoma Intl
7h 42m
1 stop
YTZ6:42 p.m.Toronto Island
16 Jun
YTZ12:15 p.m.Toronto Island
9h 50m
1 stop
SEA7:05 p.m.Seattle/Tacoma Intl
C$ 652
United Airlines
2 Jun
SEA8:00 a.m.Seattle/Tacoma Intl
7h 42m
1 stop
YTZ6:42 p.m.Toronto Island
6 Jun
YTZ12:15 p.m.Toronto Island
9h 50m
1 stop
SEA7:05 p.m.Seattle/Tacoma Intl
C$ 669
United Airlines
5 Jun
SEA10:40 p.m.Seattle/Tacoma Intl
8h 26m
1 stop
YTZ10:06 a.m.Toronto Island
9 Jun
YTZ2:55 p.m.Toronto Island
8h 51m
1 stop
SEA8:46 p.m.Seattle/Tacoma Intl
C$ 700

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Toronto Island 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 10 May 2026.
Use the filters below to find and compare flights from Seattle to Toronto Island Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sat 6/6

5:45 a.m.-6:22 p.m.

2 stops9h 37m

Toronto Island

Sun 7/6

6:55 p.m.-10:05 a.m.

2 stops18h 10m

C$ 592

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Tue 2/6

8:00 a.m.-6:42 p.m.

1 stop7h 42m

Toronto Island

Sat 6/6

12:15 p.m.-7:05 p.m.

1 stop9h 50m

C$ 669

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Tue 9/6

10:45 a.m.-7:52 a.m.

2 stops18h 07m

Toronto Island

Mon 15/6

3:35 p.m.-10:40 p.m.

2 stops10h 05m

C$ 684

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sat 22/8

3:00 p.m.-7:45 a.m.

2 stops13h 45m

Toronto Island

Tue 25/8

12:30 p.m.-10:48 p.m.

2 stops13h 18m

C$ 693
Quickest round-trip

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Fri 5/6

10:40 p.m.-10:06 a.m.

1 stop8h 26m

Toronto Island

Tue 9/6

2:55 p.m.-8:46 p.m.

1 stop8h 51m

C$ 700

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Fri 5/6

11:30 p.m.-1:00 p.m.

1 stop10h 30m

Toronto Island

Mon 15/6

11:55 a.m.-9:00 p.m.

2 stops12h 05m

C$ 711

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Fri 5/6

10:40 p.m.-10:06 a.m.

1 stop8h 26m

Toronto Island

Mon 8/6

12:15 p.m.-7:05 p.m.

1 stop9h 50m

C$ 714

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Tue 9/6

3:53 p.m.-5:35 p.m.

1 stop22h 42m

Toronto Island

Mon 15/6

11:55 a.m.-9:40 a.m.

2 stops24h 45m

C$ 722

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Tue 9/6

3:53 p.m.-5:35 p.m.

1 stop22h 42m

Toronto Island

Mon 15/6

11:55 a.m.-9:00 p.m.

2 stops12h 05m

C$ 723

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sat 8/8

7:20 p.m.-7:45 a.m.

2 stops9h 25m

Toronto Island

Tue 11/8

10:45 a.m.-10:07 a.m.

2 stops26h 22m

C$ 734

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Toronto from

How to get the cheapest flight ticket from Seattle to Toronto Island 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 Island?

United Airlines is the most popular carrier operating from Seattle/Tacoma Intl to Toronto Island

When to book flights from Seattle to Toronto Island Airport

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

Cheap Seattle to Toronto Island Airport (SEA to YTZ) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Toronto Island Airport

Fastest flight time

7h 16m

Direct flights

None
The fastest flight from Seattle to Toronto Island Airport takes 7h 16m
There are no direct flights from Seattle to Toronto Island Airport. There are no popular flight routes from Seattle to Toronto Island Airport.
Search flight deals

Frequently asked questions about flying from Seattle to Toronto Island Airport

  • How far is Seattle/Tacoma Intl to Toronto Island by plane?

    Toronto Island is 3323.2 km away from Seattle/Tacoma Intl. Flights usually cover this in 7h 16m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Toronto Island Airport are updated daily.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Toronto Island Airport.

  • What documentation or ID do you need to fly to Toronto Island Airport?

    The travel and health documents required for your trip to Toronto Island 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 Island 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
Apsley

Why use momondo?

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

Finding the right flight to Toronto from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognizable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Toronto quick and easy, saving you time and money.

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

Flights from Seattle to Toronto with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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 Island Airport trip

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