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Cheap flights from Seattle to Toronto from $209

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 9/12. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to Toronto

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
8:10 am - 6:42 pm
SEA
-
YTZ
7h 32m
1 stop
United Airlines Logo
2:55 pm - 8:37 pm
YTZ
-
SEA
8h 42m
1 stop
$466United Airlines
Tue, Oct 6 - Sat, Oct 10
Multiple Airlines Logo
6:00 am - 6:00 pm
SEA
-
YTZ
9h 00m
1 stop
Multiple Airlines Logo
8:40 pm - 8:30 am
YTZ
-
SEA
14h 50m
1 stop
$467Multiple Airlines
Wed, Sep 2 - Tue, Sep 8
Multiple Airlines Logo
12:16 am - 2:25 pm
SEA
-
YTZ
11h 09m
1 stop
Multiple Airlines Logo
1:40 pm - 9:38 pm
YTZ
-
SEA
10h 58m
1 stop
$472Multiple Airlines
Tue, Sep 1 - Wed, Sep 9
Multiple Airlines Logo
12:14 am - 2:25 pm
SEA
-
YTZ
11h 11m
1 stop
Multiple Airlines Logo
1:40 pm - 9:59 pm
YTZ
-
SEA
11h 19m
1 stop
$482Multiple Airlines
Tue, Oct 6 - Sat, Oct 17
United Airlines Logo
11:00 pm - 10:06 am
SEA
-
YTZ
8h 06m
1 stop
United Airlines Logo
7:20 pm - 9:36 am
YTZ
-
SEA
17h 16m
1 stop
$487United Airlines
Fri, Aug 28 - Tue, Sep 1
Multiple Airlines Logo
5:51 pm - 9:40 am
SEA
-
YTZ
12h 49m
1 stop
Multiple Airlines Logo
10:05 am - 6:51 pm
YTZ
-
SEA
11h 46m
2 stops
$491Multiple Airlines
Wed, Sep 2 - Wed, Sep 9
Multiple Airlines Logo
6:00 am - 6:00 pm
SEA
-
YTZ
9h 00m
1 stop
Multiple Airlines Logo
8:40 pm - 8:30 am
YTZ
-
SEA
14h 50m
1 stop
$514Multiple Airlines
Tue, Sep 8 - Fri, Sep 11
Air Canada Logo
7:20 pm - 7:45 am
SEA
-
YTZ
9h 25m
2 stops
Air Canada Logo
8:55 pm - 10:07 am
YTZ
-
SEA
16h 12m
2 stops
$516Air Canada
Fri, Jul 3 - Fri, Jul 10
Air Canada Logo
7:20 pm - 6:20 pm
SEA
-
YTZ
20h 00m
2 stops
Air Canada Logo
12:30 pm - 10:42 pm
YTZ
-
SEA
13h 12m
2 stops
$519Air Canada
Sat, Aug 8 - Wed, Aug 19
Multiple Airlines Logo
5:46 pm - 9:40 am
SEA
-
YTZ
12h 54m
1 stop
Multiple Airlines Logo
9:15 am - 9:34 pm
YTZ
-
SEA
15h 19m
2 stops
$522Multiple Airlines
Tue, Oct 20 - Tue, Oct 27

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Air Canada flights from Seattle to Toronto Island Airport

Our best Air Canada deals on Seattle to Toronto Island Airport flight tickets
Air Canada
Jul 3
SEA7:20 pmSeattle/Tacoma Intl
9h 25m
2 stops
YTZ7:45 amToronto Island
Jul 10
YTZ8:55 pmToronto Island
16h 12m
2 stops
SEA10:07 amSeattle/Tacoma Intl
$516
Air Canada
Aug 8
SEA7:20 pmSeattle/Tacoma Intl
20h 00m
2 stops
YTZ6:20 pmToronto Island
Aug 19
YTZ12:30 pmToronto Island
13h 12m
2 stops
SEA10:42 pmSeattle/Tacoma Intl
$519
Air Canada
Sep 5
SEA3:00 pmSeattle/Tacoma Intl
19h 25m
2 stops
YTZ1:25 pmToronto Island
Sep 8
YTZ6:45 amToronto Island
18h 57m
2 stops
SEA10:42 pmSeattle/Tacoma Intl
$527

United Airlines flights from Seattle to Toronto Island Airport

Our best United Airlines deals on Seattle to Toronto Island Airport flight tickets
United Airlines
Aug 28
SEA11:00 pmSeattle/Tacoma Intl
8h 06m
1 stop
YTZ10:06 amToronto Island
Sep 1
YTZ7:20 pmToronto Island
17h 16m
1 stop
SEA9:36 amSeattle/Tacoma Intl
$487
United Airlines
Sep 4
SEA5:13 pmSeattle/Tacoma Intl
13h 54m
1 stop
YTZ10:07 amToronto Island
Sep 7
YTZ7:45 pmToronto Island
16h 51m
1 stop
SEA9:36 amSeattle/Tacoma Intl
$573
United Airlines
Sep 4
SEA5:13 pmSeattle/Tacoma Intl
13h 54m
1 stop
YTZ10:07 amToronto Island
Sep 8
YTZ7:25 pmToronto Island
17h 36m
2 stops
SEA10:01 amSeattle/Tacoma Intl
$583

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 June 14, 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
Quickest round-trip

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Tue 10/6

8:10 am-6:42 pm

1 stop7h 32m

Toronto Island

Sat 10/10

2:55 pm-8:37 pm

1 stop8h 42m

$466

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Wed 9/2

6:00 am-6:00 pm

1 stop9h 00m

Toronto Island

Tue 9/8

8:40 pm-8:30 am

1 stop14h 50m

$467

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Tue 9/1

12:16 am-2:25 pm

1 stop11h 09m

Toronto Island

Wed 9/9

1:40 pm-9:38 pm

1 stop10h 58m

$472

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Tue 10/6

12:14 am-2:25 pm

1 stop11h 11m

Toronto Island

Sat 10/17

1:40 pm-9:59 pm

1 stop11h 19m

$482

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Fri 8/28

11:00 pm-10:06 am

1 stop8h 06m

Toronto Island

Tue 9/1

7:20 pm-9:36 am

1 stop17h 16m

$487

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Wed 9/2

5:51 pm-9:40 am

1 stop12h 49m

Toronto Island

Wed 9/9

10:05 am-6:51 pm

2 stops11h 46m

$491

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Tue 9/8

6:00 am-6:00 pm

1 stop9h 00m

Toronto Island

Fri 9/11

8:40 pm-8:30 am

1 stop14h 50m

$514

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Fri 7/3

7:20 pm-7:45 am

2 stops9h 25m

Toronto Island

Fri 7/10

8:55 pm-10:07 am

2 stops16h 12m

$516

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sat 8/8

7:20 pm-6:20 pm

2 stops20h 00m

Toronto Island

Wed 8/19

12:30 pm-10:42 pm

2 stops13h 12m

$519

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Tue 10/20

5:46 pm-9:40 am

1 stop12h 54m

Toronto Island

Tue 10/27

9:15 am-9:34 pm

2 stops15h 19m

$522

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

Can stopping save me money on Seattle to Toronto Island Airport flights?

You could potentially save up to 54% on your flight if you consider stops on a Seattle to Toronto Island Airport flight.

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

6h 41m

Direct flights

None
The fastest flight from Seattle to Toronto Island Airport takes 6h 41m
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?

    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 6h 41m.

  • 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.

An easier way to manage your Toronto Island Airport trip

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