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Cheap flights from Seattle to Toronto from $110

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 4/15. 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

Enter your travel dates to find the best prices.
Air Canada Logo
7:20 pm - 10:27 am
SEA
-
YTZ
12h 07m
2 stops
Air Canada Logo
3:35 pm - 10:20 pm
YTZ
-
SEA
9h 45m
2 stops
$265Air Canada
Wed, May 20 - Wed, May 27
Air Canada Logo
8:00 pm - 10:27 am
SEA
-
YTZ
11h 27m
2 stops
Air Canada Logo
6:55 pm - 9:50 am
YTZ
-
SEA
17h 55m
2 stops
$293Air Canada
Thu, Apr 30 - Mon, May 4
Air Canada Logo
8:00 pm - 10:25 am
SEA
-
YTZ
11h 25m
2 stops
Air Canada Logo
3:35 pm - 10:50 pm
YTZ
-
SEA
10h 15m
2 stops
$324Air Canada
Tue, Apr 14 - Sat, Apr 18
Air Canada Logo
8:00 pm - 10:25 am
SEA
-
YTZ
11h 25m
2 stops
Air Canada Logo
6:55 pm - 3:05 pm
YTZ
-
SEA
23h 10m
2 stops
$394Air Canada
Mon, Apr 13 - Tue, Apr 21
Air Canada Logo
5:40 am - 7:55 pm
SEA
-
YTZ
11h 15m
2 stops
Air Canada Logo
6:55 pm - 3:05 pm
YTZ
-
SEA
23h 10m
2 stops
$398Air Canada
Sat, Mar 28 - Fri, Apr 3
Air Canada Logo
7:20 pm - 7:45 am
SEA
-
YTZ
9h 25m
2 stops
Air Canada Logo
12:30 pm - 10:22 pm
YTZ
-
SEA
12h 52m
2 stops
$401Air Canada
Wed, Jul 1 - Tue, Jul 7
Multiple Airlines Logo
5:42 pm - 6:00 pm
SEA
-
YTZ
21h 18m
1 stop
Multiple Airlines Logo
8:50 am - 8:32 am
YTZ
-
SEA
26h 42m
1 stop
$403Multiple Airlines
Thu, Apr 30 - Mon, May 4
Multiple Airlines Logo
10:15 pm - 8:54 am
SEA
-
YTZ
31h 39m
1 stop
Multiple Airlines Logo
4:30 pm - 7:02 am
YTZ
-
SEA
17h 32m
2 stops
$410Multiple Airlines
Sat, Apr 11 - Sat, Apr 18
Multiple Airlines Logo
6:03 am - 6:55 pm
SEA
-
YTZ
9h 52m
1 stop
Multiple Airlines Logo
3:00 pm - 9:10 pm
YTZ
-
SEA
9h 10m
1 stop
$412Multiple Airlines
Tue, Apr 28 - Wed, Apr 29
Multiple Airlines Logo
6:03 am - 8:03 pm
SEA
-
YTZ
11h 00m
2 stops
Multiple Airlines Logo
8:50 am - 8:32 am
YTZ
-
SEA
26h 42m
1 stop
$419Multiple Airlines
Thu, Apr 30 - Mon, May 4

United Airlines flights from Seattle to Toronto Island Airport

Our best United Airlines deals on Seattle to Toronto Island Airport flight tickets
United Airlines
Jun 5
SEA11:52 pmSeattle/Tacoma Intl
7h 14m
1 stop
YTZ10:06 amToronto Island
Jun 9
YTZ12:15 pmToronto Island
9h 51m
1 stop
SEA7:06 pmSeattle/Tacoma Intl
$432
United Airlines
Jun 8
SEA10:40 pmSeattle/Tacoma Intl
8h 26m
1 stop
YTZ10:06 amToronto Island
Jun 30
YTZ2:55 pmToronto Island
8h 51m
1 stop
SEA8:46 pmSeattle/Tacoma Intl
$465
United Airlines
Jul 28
SEA10:40 pmSeattle/Tacoma Intl
8h 26m
1 stop
YTZ10:06 amToronto Island
Aug 17
YTZ12:15 pmToronto Island
13h 14m
1 stop
SEA10:29 pmSeattle/Tacoma Intl
$487

Air Canada flights from Seattle to Toronto Island Airport

Our best Air Canada deals on Seattle to Toronto Island Airport flight tickets
Air Canada
May 20
SEA7:20 pmSeattle/Tacoma Intl
12h 07m
2 stops
YTZ10:27 amToronto Island
May 27
YTZ3:35 pmToronto Island
9h 45m
2 stops
SEA10:20 pmSeattle/Tacoma Intl
$265
Air Canada
Apr 30
SEA8:00 pmSeattle/Tacoma Intl
11h 27m
2 stops
YTZ10:27 amToronto Island
May 4
YTZ6:55 pmToronto Island
17h 55m
2 stops
SEA9:50 amSeattle/Tacoma Intl
$293
Air Canada
Apr 14
SEA8:00 pmSeattle/Tacoma Intl
11h 25m
2 stops
YTZ10:25 amToronto Island
Apr 18
YTZ3:35 pmToronto Island
10h 15m
2 stops
SEA10:50 pmSeattle/Tacoma Intl
$324

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 832,500 searches. Data last updated February 27, 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

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Wed 5/20

7:20 pm-10:27 am

2 stops12h 07m

Toronto Island

Wed 5/27

3:35 pm-10:20 pm

2 stops9h 45m

$265

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Thu 4/30

8:00 pm-10:27 am

2 stops11h 27m

Toronto Island

Mon 5/4

6:55 pm-9:50 am

2 stops17h 55m

$293

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Tue 4/14

8:00 pm-10:25 am

2 stops11h 25m

Toronto Island

Sat 4/18

3:35 pm-10:50 pm

2 stops10h 15m

$324

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Mon 4/13

8:00 pm-10:25 am

2 stops11h 25m

Toronto Island

Tue 4/21

6:55 pm-3:05 pm

2 stops23h 10m

$394

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sat 3/28

5:40 am-7:55 pm

2 stops11h 15m

Toronto Island

Fri 4/3

6:55 pm-3:05 pm

2 stops23h 10m

$398

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Wed 7/1

7:20 pm-7:45 am

2 stops9h 25m

Toronto Island

Tue 7/7

12:30 pm-10:22 pm

2 stops12h 52m

$401

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Thu 4/30

5:42 pm-6:00 pm

1 stop21h 18m

Toronto Island

Mon 5/4

8:50 am-8:32 am

1 stop26h 42m

$403

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sat 4/11

10:15 pm-8:54 am

1 stop31h 39m

Toronto Island

Sat 4/18

4:30 pm-7:02 am

2 stops17h 32m

$410

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Tue 4/28

6:03 am-6:55 pm

1 stop9h 52m

Toronto Island

Wed 4/29

3:00 pm-9:10 pm

1 stop9h 10m

$412

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Thu 4/30

6:03 am-8:03 pm

2 stops11h 00m

Toronto Island

Mon 5/4

8:50 am-8:32 am

1 stop26h 42m

$419

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 14m

Direct flights

None
The fastest flight from Seattle to Toronto Island Airport takes 7h 14m
There are no direct flights from Seattle to Toronto Island Airport. There are no popular flight routes from Seattle to Toronto Island Airport.
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  • How far is Seattle/Tacoma Intl to Toronto Island by plane?

    A flight from Seattle/Tacoma Intl to Toronto Island will travel around 2064.9 mi. In terms of flight time, this usually takes a little over 7h 14m.

  • 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?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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 you'll need for your trip to Toronto Island Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Toronto Island Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from Seattle to Toronto Island Airport?

    Price Alerts will notify you by email when the price for flights to Toronto Island Airport from Seattle decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Seattle to Toronto Island Airport with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

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 recognisable 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?

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?

momondo provides multiple filters to help you find the best flight to Toronto from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to Toronto from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Toronto Island Airport trip

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