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Cheap flights from Seattle to Toronto from $140

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 2/15. 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
7:15 am - 7:52 pm
SEA
-
YTZ
9h 37m
1 stop
Air Canada Logo
12:30 pm - 7:37 pm
YTZ
-
SEA
10h 07m
1 stop
$271Air Canada
Tue, May 12 - Sun, May 17
Air Canada Logo
7:15 am - 7:52 pm
SEA
-
YTZ
9h 37m
1 stop
Air Canada Logo
12:30 pm - 7:37 pm
YTZ
-
SEA
10h 07m
1 stop
$282Air Canada
Fri, May 15 - Mon, May 18
Air Canada Logo
7:15 am - 9:32 pm
SEA
-
YTZ
11h 17m
1 stop
Air Canada Logo
12:30 pm - 7:37 pm
YTZ
-
SEA
10h 07m
1 stop
$311Air Canada
Thu, May 14 - Mon, May 18
Air Canada Logo
7:15 am - 7:52 pm
SEA
-
YTZ
9h 37m
1 stop
Air Canada Logo
12:30 pm - 7:37 pm
YTZ
-
SEA
10h 07m
1 stop
$372Air Canada
Tue, May 12 - Sun, May 17
Air Canada Logo
8:00 pm - 9:42 am
SEA
-
YTZ
10h 42m
2 stops
Air Canada Logo
3:35 pm - 10:10 pm
YTZ
-
SEA
9h 35m
2 stops
$387Air Canada
Mon, Mar 16 - Mon, Apr 13
Multiple Airlines Logo
5:55 pm - 1:47 pm
SEA
-
YTZ
16h 52m
1 stop
Multiple Airlines Logo
8:25 am - 8:13 am
YTZ
-
SEA
26h 48m
2 stops
$405Multiple Airlines
Sun, Feb 22 - Thu, Feb 26
Multiple Airlines Logo
5:55 pm - 1:47 pm
SEA
-
YTZ
16h 52m
1 stop
Multiple Airlines Logo
9:20 am - 6:40 pm
YTZ
-
SEA
12h 20m
1 stop
$418Multiple Airlines
Sun, Feb 22 - Thu, Feb 26
Multiple Airlines Logo
10:45 pm - 4:25 pm
SEA
-
YTZ
14h 40m
1 stop
Multiple Airlines Logo
4:30 pm - 7:02 am
YTZ
-
SEA
17h 32m
2 stops
$427Multiple Airlines
Mon, Mar 16 - Mon, Apr 13
Multiple Airlines Logo
3:10 pm - 5:43 pm
SEA
-
YTZ
23h 33m
3 stops
Multiple Airlines Logo
2:05 pm - 10:25 am
YTZ
-
SEA
23h 20m
3 stops
$433Multiple Airlines
Mon, Feb 2 - Thu, Feb 5
Air Canada Logo
7:15 am - 9:32 pm
SEA
-
YTZ
11h 17m
1 stop
Air Canada Logo
12:30 pm - 7:37 pm
YTZ
-
SEA
10h 07m
1 stop
$446Air Canada
Sat, May 2 - Sun, May 10

Air Canada flights from Seattle to Toronto Island Airport

Our best Air Canada deals on Seattle to Toronto Island Airport flight tickets
Air Canada
Mar 16
SEA8:00 pmSeattle/Tacoma Intl
10h 42m
2 stops
YTZ9:42 amToronto Island
Apr 13
YTZ3:35 pmToronto Island
9h 35m
2 stops
SEA10:10 pmSeattle/Tacoma Intl
$387
Air Canada
Mar 5
SEA5:50 amSeattle/Tacoma Intl
9h 20m
2 stops
YTZ6:10 pmToronto Island
Mar 11
YTZ9:30 amToronto Island
12h 46m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$447
Air Canada
Mar 7
SEA5:50 amSeattle/Tacoma Intl
9h 20m
2 stops
YTZ6:10 pmToronto Island
Mar 14
YTZ6:30 pmToronto Island
23h 31m
2 stops
SEA3:01 pmSeattle/Tacoma Intl
$516

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 January 21, 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

Tue 5/12

7:15 am-7:52 pm

1 stop9h 37m

Toronto Island

Sun 5/17

12:30 pm-7:37 pm

1 stop10h 07m

$271

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Fri 5/15

7:15 am-7:52 pm

1 stop9h 37m

Toronto Island

Mon 5/18

12:30 pm-7:37 pm

1 stop10h 07m

$282

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Thu 5/14

7:15 am-9:32 pm

1 stop11h 17m

Toronto Island

Mon 5/18

12:30 pm-7:37 pm

1 stop10h 07m

$311

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Tue 5/12

7:15 am-7:52 pm

1 stop9h 37m

Toronto Island

Sun 5/17

12:30 pm-7:37 pm

1 stop10h 07m

$372

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Mon 3/16

8:00 pm-9:42 am

2 stops10h 42m

Toronto Island

Mon 4/13

3:35 pm-10:10 pm

2 stops9h 35m

$387

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sun 2/22

5:55 pm-1:47 pm

1 stop16h 52m

Toronto Island

Thu 2/26

8:25 am-8:13 am

2 stops26h 48m

$405

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sun 2/22

5:55 pm-1:47 pm

1 stop16h 52m

Toronto Island

Thu 2/26

9:20 am-6:40 pm

1 stop12h 20m

$418

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Mon 3/16

10:45 pm-4:25 pm

1 stop14h 40m

Toronto Island

Mon 4/13

4:30 pm-7:02 am

2 stops17h 32m

$427

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Mon 2/2

3:10 pm-5:43 pm

3 stops23h 33m

Toronto Island

Thu 2/5

2:05 pm-10:25 am

3 stops23h 20m

$433

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sat 5/2

7:15 am-9:32 pm

1 stop11h 17m

Toronto Island

Sun 5/10

12:30 pm-7:37 pm

1 stop10h 07m

$446

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?

Air Canada 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

  • 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 16m.

  • 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.

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.

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