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Cheap flights from Toronto Island Airport to Seattle from C$ 300

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 16/6. 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 Toronto Island Airport to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
8:55 p.m. - 10:05 a.m.
YTZ
-
SEA
16h 10m
2 stops
Air Canada Logo
2:55 p.m. - 10:12 a.m.
SEA
-
YTZ
16h 17m
2 stops
C$ 488Air Canada
Thu, 21 May - Wed, 27 May
Air Canada Logo
8:55 p.m. - 10:05 a.m.
YTZ
-
SEA
16h 10m
2 stops
Air Canada Logo
7:20 p.m. - 7:47 a.m.
SEA
-
YTZ
9h 27m
2 stops
C$ 525Air Canada
Thu, 28 May - Sat, 6 Jun
United Airlines Logo
7:20 p.m. - 8:00 a.m.
YTZ
-
SEA
15h 40m
2 stops
United Airlines Logo
3:33 p.m. - 10:06 a.m.
SEA
-
YTZ
15h 33m
2 stops
C$ 529United Airlines
Fri, 5 Jun - Tue, 9 Jun
Air Canada Logo
8:55 p.m. - 10:05 a.m.
YTZ
-
SEA
16h 10m
2 stops
Air Canada Logo
7:20 p.m. - 7:47 a.m.
SEA
-
YTZ
9h 27m
2 stops
C$ 535Air Canada
Thu, 28 May - Sat, 6 Jun
Air Canada Logo
8:55 p.m. - 10:05 a.m.
YTZ
-
SEA
16h 10m
2 stops
Air Canada Logo
2:55 p.m. - 10:12 a.m.
SEA
-
YTZ
16h 17m
2 stops
C$ 552Air Canada
Thu, 21 May - Wed, 27 May
United Airlines Logo
12:15 p.m. - 7:05 p.m.
YTZ
-
SEA
9h 50m
1 stop
United Airlines Logo
8:00 a.m. - 6:42 p.m.
SEA
-
YTZ
7h 42m
1 stop
C$ 562United Airlines
Thu, 4 Jun - Sat, 6 Jun
United Airlines Logo
12:15 p.m. - 7:05 p.m.
YTZ
-
SEA
9h 50m
1 stop
United Airlines Logo
5:15 p.m. - 10:06 a.m.
SEA
-
YTZ
13h 51m
1 stop
C$ 573United Airlines
Fri, 5 Jun - Mon, 8 Jun
Air Canada Logo
8:55 p.m. - 10:05 a.m.
YTZ
-
SEA
16h 10m
2 stops
Air Canada Logo
7:20 p.m. - 6:20 p.m.
SEA
-
YTZ
20h 00m
2 stops
C$ 577Air Canada
Tue, 19 May - Fri, 24 Jul
Air Canada Logo
6:55 p.m. - 10:05 a.m.
YTZ
-
SEA
18h 10m
2 stops
Air Canada Logo
10:45 a.m. - 6:20 p.m.
SEA
-
YTZ
28h 35m
2 stops
C$ 592Air Canada
Tue, 19 May - Sat, 25 Jul
Air Canada Logo
6:55 p.m. - 10:05 a.m.
YTZ
-
SEA
18h 10m
2 stops
Air Canada Logo
7:20 p.m. - 7:45 a.m.
SEA
-
YTZ
9h 25m
2 stops
C$ 595Air Canada
Tue, 19 May - Sun, 26 Jul

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 May
YTZ8:55 p.m.Toronto Island
16h 10m
2 stops
SEA10:05 a.m.Seattle/Tacoma Intl
27 May
SEA2:55 p.m.Seattle/Tacoma Intl
16h 17m
2 stops
YTZ10:12 a.m.Toronto Island
C$ 488
Air Canada
28 May
YTZ8:55 p.m.Toronto Island
16h 10m
2 stops
SEA10:05 a.m.Seattle/Tacoma Intl
6 Jun
SEA7:20 p.m.Seattle/Tacoma Intl
9h 27m
2 stops
YTZ7:47 a.m.Toronto Island
C$ 525
Air Canada
28 May
YTZ8:55 p.m.Toronto Island
16h 10m
2 stops
SEA10:05 a.m.Seattle/Tacoma Intl
6 Jun
SEA7:20 p.m.Seattle/Tacoma Intl
9h 27m
2 stops
YTZ7:47 a.m.Toronto Island
C$ 535

United Airlines flights from Toronto Island Airport to Seattle

Our best United Airlines deals on Toronto Island Airport to Seattle flight tickets
United Airlines
5 Jun
YTZ7:20 p.m.Toronto Island
15h 40m
2 stops
SEA8:00 a.m.Seattle/Tacoma Intl
9 Jun
SEA3:33 p.m.Seattle/Tacoma Intl
15h 33m
2 stops
YTZ10:06 a.m.Toronto Island
C$ 529
United Airlines
4 Jun
YTZ12:15 p.m.Toronto Island
9h 50m
1 stop
SEA7:05 p.m.Seattle/Tacoma Intl
6 Jun
SEA8:00 a.m.Seattle/Tacoma Intl
7h 42m
1 stop
YTZ6:42 p.m.Toronto Island
C$ 562
United Airlines
5 Jun
YTZ12:15 p.m.Toronto Island
9h 50m
1 stop
SEA7:05 p.m.Seattle/Tacoma Intl
9 Jun
SEA8:00 a.m.Seattle/Tacoma Intl
7h 42m
1 stop
YTZ6:42 p.m.Toronto Island
C$ 636

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 7 May 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

Thu 21/5

8:55 p.m.-10:05 a.m.

2 stops16h 10m

Seattle/Tacoma Intl

Wed 27/5

2:55 p.m.-10:12 a.m.

2 stops16h 17m

C$ 488

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Thu 28/5

8:55 p.m.-10:05 a.m.

2 stops16h 10m

Seattle/Tacoma Intl

Sat 6/6

7:20 p.m.-7:47 a.m.

2 stops9h 27m

C$ 525

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Fri 5/6

7:20 p.m.-8:00 a.m.

2 stops15h 40m

Seattle/Tacoma Intl

Tue 9/6

3:33 p.m.-10:06 a.m.

2 stops15h 33m

C$ 529

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Thu 28/5

8:55 p.m.-10:05 a.m.

2 stops16h 10m

Seattle/Tacoma Intl

Sat 6/6

7:20 p.m.-7:47 a.m.

2 stops9h 27m

C$ 535

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Thu 21/5

8:55 p.m.-10:05 a.m.

2 stops16h 10m

Seattle/Tacoma Intl

Wed 27/5

2:55 p.m.-10:12 a.m.

2 stops16h 17m

C$ 552
Quickest round-trip

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Thu 4/6

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

1 stop9h 50m

Seattle/Tacoma Intl

Sat 6/6

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

1 stop7h 42m

C$ 562

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Fri 5/6

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

1 stop9h 50m

Seattle/Tacoma Intl

Mon 8/6

5:15 p.m.-10:06 a.m.

1 stop13h 51m

C$ 573

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Tue 19/5

8:55 p.m.-10:05 a.m.

2 stops16h 10m

Seattle/Tacoma Intl

Fri 24/7

7:20 p.m.-6:20 p.m.

2 stops20h 00m

C$ 577

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Tue 19/5

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

2 stops18h 10m

Seattle/Tacoma Intl

Sat 25/7

10:45 a.m.-6:20 p.m.

2 stops28h 35m

C$ 592

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Tue 19/5

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

2 stops18h 10m

Seattle/Tacoma Intl

Sun 26/7

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

2 stops9h 25m

C$ 595

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$ 547. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 805. 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$ 509. Flights in the morning are often more expensive with an average ticket price of C$ 931.

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

8h 51m

Direct flights

None
The fastest flight from Toronto Island Airport to Seattle takes 8h 51m
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 8h 51m, 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
SeaTac
Redmond
Marysville
Kirkland
Woodinville
Tacoma
Puyallup
Tukwila
Olympia
Ocean Shores
Ellensburg
Bainbridge Island
Gig Harbor
Renton
Kent
Edmonds
Centralia
Shelton

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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