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Cheap flights from Toronto Island Airport to Seattle from C$ 329

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Toronto Island Airport to Seattle departing on 19/7. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Toronto Island Airport to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
6:45 a.m. - 10:42 p.m.
YTZ
-
SEA
18h 57m
2 stops
Air Canada Logo
5:40 a.m. - 9:30 p.m.
SEA
-
YTZ
12h 50m
2 stops
C$ 582Air Canada
Wed, 21 Oct - Sat, 24 Oct
United Airlines Logo
7:25 p.m. - 9:36 a.m.
YTZ
-
SEA
17h 11m
1 stop
United Airlines Logo
11:13 p.m. - 10:06 a.m.
SEA
-
YTZ
7h 53m
1 stop
C$ 626United Airlines
Wed, 21 Oct - Sat, 24 Oct
United Airlines Logo
7:25 p.m. - 9:36 a.m.
YTZ
-
SEA
17h 11m
1 stop
United Airlines Logo
11:13 p.m. - 10:06 a.m.
SEA
-
YTZ
7h 53m
1 stop
C$ 628United Airlines
Wed, 21 Oct - Sat, 24 Oct
United Airlines Logo
7:45 p.m. - 9:35 a.m.
YTZ
-
SEA
16h 50m
1 stop
United Airlines Logo
11:00 p.m. - 10:07 a.m.
SEA
-
YTZ
8h 07m
1 stop
C$ 632United Airlines
Fri, 4 Sep - Sun, 20 Sep
United Airlines Logo
12:15 p.m. - 7:07 p.m.
YTZ
-
SEA
9h 52m
1 stop
United Airlines Logo
11:00 p.m. - 10:07 a.m.
SEA
-
YTZ
8h 07m
1 stop
C$ 640United Airlines
Wed, 2 Sep - Wed, 2 Sep
United Airlines Logo
12:15 p.m. - 10:43 p.m.
YTZ
-
SEA
13h 28m
1 stop
United Airlines Logo
8:10 a.m. - 6:46 p.m.
SEA
-
YTZ
7h 36m
1 stop
C$ 648United Airlines
Mon, 17 Aug - Tue, 1 Sep
United Airlines Logo
12:15 p.m. - 7:07 p.m.
YTZ
-
SEA
9h 52m
1 stop
United Airlines Logo
5:26 p.m. - 10:07 a.m.
SEA
-
YTZ
13h 41m
1 stop
C$ 649United Airlines
Tue, 18 Aug - Sun, 30 Aug
United Airlines Logo
12:15 p.m. - 7:07 p.m.
YTZ
-
SEA
9h 52m
1 stop
United Airlines Logo
11:00 p.m. - 10:07 a.m.
SEA
-
YTZ
8h 07m
1 stop
C$ 653United Airlines
Wed, 19 Aug - Mon, 31 Aug
Multiple Airlines Logo
10:05 a.m. - 6:16 p.m.
YTZ
-
SEA
11h 11m
1 stop
Multiple Airlines Logo
12:16 a.m. - 2:25 p.m.
SEA
-
YTZ
11h 09m
1 stop
C$ 684Multiple Airlines
Sat, 5 Sep - Fri, 25 Sep
Multiple Airlines Logo
8:40 p.m. - 8:30 a.m.
YTZ
-
SEA
14h 50m
1 stop
Multiple Airlines Logo
12:16 a.m. - 2:25 p.m.
SEA
-
YTZ
11h 09m
1 stop
C$ 691Multiple Airlines
Tue, 1 Sep - Mon, 21 Sep

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United Airlines flights from Toronto Island Airport to Seattle

Our best United Airlines deals on Toronto Island Airport to Seattle flight tickets
United Airlines
21 Oct
YTZ7:25 p.m.Toronto Island
17h 11m
1 stop
SEA9:36 a.m.Seattle/Tacoma Intl
24 Oct
SEA11:13 p.m.Seattle/Tacoma Intl
7h 53m
1 stop
YTZ10:06 a.m.Toronto Island
C$ 626
United Airlines
21 Oct
YTZ7:25 p.m.Toronto Island
17h 36m
2 stops
SEA10:01 a.m.Seattle/Tacoma Intl
24 Oct
SEA8:46 a.m.Seattle/Tacoma Intl
22h 20m
2 stops
YTZ10:06 a.m.Toronto Island
C$ 628
United Airlines
4 Sep
YTZ7:45 p.m.Toronto Island
16h 50m
1 stop
SEA9:35 a.m.Seattle/Tacoma Intl
20 Sep
SEA11:00 p.m.Seattle/Tacoma Intl
8h 07m
1 stop
YTZ10:07 a.m.Toronto Island
C$ 632

Air Canada flights from Toronto Island Airport to Seattle

Our best Air Canada deals on Toronto Island Airport to Seattle flight tickets
Air Canada
21 Oct
YTZ6:45 a.m.Toronto Island
18h 57m
2 stops
SEA10:42 p.m.Seattle/Tacoma Intl
24 Oct
SEA5:40 a.m.Seattle/Tacoma Intl
12h 50m
2 stops
YTZ9:30 p.m.Toronto Island
C$ 582
Air Canada
10 Jul
YTZ3:35 p.m.Toronto Island
10h 07m
2 stops
SEA10:42 p.m.Seattle/Tacoma Intl
13 Jul
SEA10:45 a.m.Seattle/Tacoma Intl
18h 06m
2 stops
YTZ7:51 a.m.Toronto Island
C$ 816
Air Canada
29 Jun
YTZ12:30 p.m.Toronto Island
13h 12m
2 stops
SEA10:42 p.m.Seattle/Tacoma Intl
8 Jul
SEA7:20 p.m.Seattle/Tacoma Intl
13h 31m
2 stops
YTZ11:51 a.m.Toronto Island
C$ 920

momondo Fare Finder

 
Customize your flight search to find flights from Toronto Island Airport to Seattle 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 23 June 2026.
Use the filters below to find and compare flights from Toronto Island Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Wed 21/10

6:45 a.m.-10:42 p.m.

2 stops18h 57m

Seattle/Tacoma Intl

Sat 24/10

5:40 a.m.-9:30 p.m.

2 stops12h 50m

C$ 582

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Wed 21/10

7:25 p.m.-9:36 a.m.

1 stop17h 11m

Seattle/Tacoma Intl

Sat 24/10

11:13 p.m.-10:06 a.m.

1 stop7h 53m

C$ 626

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Wed 21/10

7:25 p.m.-9:36 a.m.

1 stop17h 11m

Seattle/Tacoma Intl

Sat 24/10

11:13 p.m.-10:06 a.m.

1 stop7h 53m

C$ 628

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Fri 4/9

7:45 p.m.-9:35 a.m.

1 stop16h 50m

Seattle/Tacoma Intl

Sun 20/9

11:00 p.m.-10:07 a.m.

1 stop8h 07m

C$ 632
Quickest round-trip

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Wed 2/9

12:15 p.m.-7:07 p.m.

1 stop9h 52m

Seattle/Tacoma Intl

Wed 2/9

11:00 p.m.-10:07 a.m.

1 stop8h 07m

C$ 640

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Mon 17/8

12:15 p.m.-10:43 p.m.

1 stop13h 28m

Seattle/Tacoma Intl

Tue 1/9

8:10 a.m.-6:46 p.m.

1 stop7h 36m

C$ 648

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Tue 18/8

12:15 p.m.-7:07 p.m.

1 stop9h 52m

Seattle/Tacoma Intl

Sun 30/8

5:26 p.m.-10:07 a.m.

1 stop13h 41m

C$ 649

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Wed 19/8

12:15 p.m.-7:07 p.m.

1 stop9h 52m

Seattle/Tacoma Intl

Mon 31/8

11:00 p.m.-10:07 a.m.

1 stop8h 07m

C$ 653

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Sat 5/9

10:05 a.m.-6:16 p.m.

1 stop11h 11m

Seattle/Tacoma Intl

Fri 25/9

12:16 a.m.-2:25 p.m.

1 stop11h 09m

C$ 684

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Tue 1/9

8:40 p.m.-8:30 a.m.

1 stop14h 50m

Seattle/Tacoma Intl

Mon 21/9

12:16 a.m.-2:25 p.m.

1 stop11h 09m

C$ 691

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 Seattle from

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

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 day to depart on your flight to Seattle?

Our data shows that Thursday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 529. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 843. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

What is the cheapest time of day to depart on your flight to Seattle?

Our most recent data shows that the best time of day to fly to Seattle is in the evening. Flights from Toronto Island Airport to Seattle during this time can be as low as C$ 519. Flights in the morning are often more expensive with an average ticket price of C$ 1,211.

When to book flights from Toronto Island Airport to Seattle

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

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

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

Fastest flight time

9h 33m

Direct flights

None
The fastest flight from Toronto Island Airport to Seattle takes 9h 33m
There are no direct flights from Toronto Island Airport to Seattle. There are no popular flight routes from Toronto Island Airport to Seattle.
Search flight deals

Frequently asked questions about flying from Toronto Island Airport to Seattle

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

    The straight-line distance from Toronto Island to Seattle/Tacoma Intl is 3323.2 km. Flights usually cover this in 9h 33m, depending on flying conditions and air traffic around both airports.

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

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

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

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl 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 Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Lynnwood
Leavenworth
Redmond
Kirkland
SeaTac
Marysville
Tacoma
Woodinville
Puyallup
Tukwila
Olympia
Ocean Shores
Ellensburg
Federal Way
Bainbridge Island
Gig Harbor
Renton
Shoreline
Kent
Edmonds

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Toronto to Seattle. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to Seattle from Toronto with this policy.

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

Once all potential Toronto to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Toronto and alert you when they change.

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