What is the cheapest airline that flies from Toronto Island to Seattle/Tacoma Intl?

United Airlines is the most popular carrier operating from Toronto Island to Seattle/Tacoma Intl

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 were last updated today.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$224 Cheap Flights from Toronto Island Airport to Seattle in 2026

Find the cheapest flights from Toronto Island Airport to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:55 pm - 10:05 amYTZ Toronto Island-SEA Seattle/Tacoma Intl

16h 10m2 stops Ottawa Vancouver Intl

7:15 pm - 10:55 amSEA Seattle/Tacoma Intl-YTZ Toronto Island

12h 40m2 stops Vancouver Intl Ottawa

$419Air Canada

Mon, Sep 21 - Mon, Sep 28

3:35 pm - 10:47 pmYTZ Toronto Island-SEA Seattle/Tacoma Intl

10h 12m2 stops Ottawa Vancouver Intl

7:15 pm - 10:55 amSEA Seattle/Tacoma Intl-YTZ Toronto Island

12h 40m2 stops Vancouver Intl Ottawa

$421Air Canada

Sat, Sep 12 - Sat, Sep 19

10:45 am - 10:42 pmYTZ Toronto Island-SEA Seattle/Tacoma Intl

14h 57m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

5:40 am - 9:30 pmSEA Seattle/Tacoma Intl-YTZ Toronto Island

12h 50m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$447Air Canada

Thu, Oct 1 - Sat, Oct 3

8:55 pm - 10:05 amYTZ Toronto Island-SEA Seattle/Tacoma Intl

16h 10m2 stops Ottawa Vancouver Intl

7:15 pm - 10:55 amSEA Seattle/Tacoma Intl-YTZ Toronto Island

12h 40m2 stops Vancouver Intl Ottawa

$471Air Canada

Fri, Sep 11 - Sat, Sep 19

12:15 pm - 6:52 pmYTZ Toronto Island-SEA Seattle/Tacoma Intl

9h 37m1 stop Chicago O'Hare Intl

11:13 pm - 10:07 amSEA Seattle/Tacoma Intl-YTZ Toronto Island

7h 54m1 stop Chicago O'Hare Intl

$479United Airlines

Thu, Oct 1 - Sat, Oct 3

12:15 pm - 7:07 pmYTZ Toronto Island-SEA Seattle/Tacoma Intl

9h 52m1 stop Chicago O'Hare Intl

11:13 pm - 10:07 amSEA Seattle/Tacoma Intl-YTZ Toronto Island

7h 54m1 stop Chicago O'Hare Intl

$481United Airlines

Sat, Aug 29 - Wed, Oct 7

6:55 pm - 10:05 amYTZ Toronto Island-SEA Seattle/Tacoma Intl

18h 10m2 stops Ottawa Vancouver Intl

5:50 am - 9:30 pmSEA Seattle/Tacoma Intl-YTZ Toronto Island

12h 40m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$484Air Canada

Sat, Sep 5 - Wed, Sep 23

1:40 pm - 1:22 pmYTZ Toronto Island-SEA Seattle/Tacoma Intl

26h 42m2 stops Washington, D.C. Dulles Intl Denver Intl

9:35 pm - 1:35 pmSEA Seattle/Tacoma Intl-YTZ Toronto Island

13h 00m1 stop Washington, D.C. Dulles Intl

$487Multiple Airlines

Sat, Aug 29 - Sat, Sep 5

1:40 pm - 1:22 pmYTZ Toronto Island-SEA Seattle/Tacoma Intl

26h 42m2 stops Washington, D.C. Dulles Intl Denver Intl

9:35 pm - 1:35 pmSEA Seattle/Tacoma Intl-YTZ Toronto Island

13h 00m1 stop Washington, D.C. Dulles Intl

$488Multiple Airlines

Sat, Aug 29 - Sat, Sep 5

9:30 am - 10:42 pmYTZ Toronto Island-SEA Seattle/Tacoma Intl

16h 12m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

5:50 am - 6:20 pmSEA Seattle/Tacoma Intl-YTZ Toronto Island

9h 30m2 stops Vancouver Intl Ottawa

$490Air Canada

Sun, Sep 6 - Sat, Sep 12

Cheap last minute flights

Enter your travel dates to find the best prices.

7:35 pm - 9:35 amYTZ Toronto Island-SEA Seattle/Tacoma Intl

17h 00m1 stop Chicago O'Hare Intl

11:00 pm - 10:18 amSEA Seattle/Tacoma Intl-YTZ Toronto Island

8h 18m1 stop Chicago O'Hare Intl

$727United Airlines

Thu, Aug 13 - Sat, Aug 29

8:30 am - 7:48 pmYTZ Toronto Island-SEA Seattle/Tacoma Intl

14h 18m1 stop Newark

8:53 pm - 12:55 pmSEA Seattle/Tacoma Intl-YTZ Toronto Island

13h 02m2 stops Las Vegas Harry Reid Intl Washington, D.C. Dulles Intl

$753Multiple Airlines

Thu, Aug 13 - Sat, Aug 29

8:30 am - 7:48 pmYTZ Toronto Island-SEA Seattle/Tacoma Intl

14h 18m1 stop Newark

9:35 pm - 12:55 pmSEA Seattle/Tacoma Intl-YTZ Toronto Island

12h 20m1 stop Washington, D.C. Dulles Intl

$772Multiple Airlines

Thu, Aug 13 - Sat, Aug 29

12:15 pm - 10:56 pmYTZ Toronto Island-SEA Seattle/Tacoma Intl

13h 41m1 stop Chicago O'Hare Intl

8:10 am - 6:56 pmSEA Seattle/Tacoma Intl-YTZ Toronto Island

7h 46m1 stop Washington, D.C. Dulles Intl

$774United Airlines

Mon, Aug 10 - Thu, Aug 27

7:35 pm - 9:35 amYTZ Toronto Island-SEA Seattle/Tacoma Intl

17h 00m1 stop Chicago O'Hare Intl

11:00 pm - 10:18 amSEA Seattle/Tacoma Intl-YTZ Toronto Island

8h 18m1 stop Chicago O'Hare Intl

$789United Airlines

Thu, Aug 13 - Mon, Aug 24

12:30 pm - 10:42 pmYTZ Toronto Island-SEA Seattle/Tacoma Intl

13h 12m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

5:50 am - 9:31 pmSEA Seattle/Tacoma Intl-YTZ Toronto Island

12h 41m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$808Air Canada

Tue, Aug 11 - Fri, Aug 28

7:35 pm - 9:35 amYTZ Toronto Island-SEA Seattle/Tacoma Intl

17h 00m1 stop Chicago O'Hare Intl

11:00 pm - 10:18 amSEA Seattle/Tacoma Intl-YTZ Toronto Island

8h 18m1 stop Chicago O'Hare Intl

$809United Airlines

Wed, Aug 12 - Tue, Aug 18

7:35 pm - 9:35 amYTZ Toronto Island-SEA Seattle/Tacoma Intl

17h 00m1 stop Chicago O'Hare Intl

11:04 pm - 6:56 pmSEA Seattle/Tacoma Intl-YTZ Toronto Island

16h 52m1 stop Washington, D.C. Dulles Intl

$824United Airlines

Wed, Aug 12 - Sat, Aug 15

7:35 pm - 9:35 amYTZ Toronto Island-SEA Seattle/Tacoma Intl

17h 00m1 stop Chicago O'Hare Intl

11:00 pm - 10:18 amSEA Seattle/Tacoma Intl-YTZ Toronto Island

8h 18m1 stop Chicago O'Hare Intl

$836United Airlines

Tue, Aug 11 - Tue, Aug 25

12:25 pm - 7:48 pmYTZ Toronto Island-SEA Seattle/Tacoma Intl

10h 23m1 stop Newark

8:53 pm - 5:20 pmSEA Seattle/Tacoma Intl-YTZ Toronto Island

17h 27m2 stops Las Vegas Harry Reid Intl Washington, D.C. Dulles Intl

$873Multiple Airlines

Wed, Aug 12 - Tue, Aug 18

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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

Sep 22

YTZ12:15 pmToronto Island

10h 00m

1 stop

SEA7:15 pmSeattle/Tacoma Intl

Sep 29

SEA11:13 pmSeattle/Tacoma Intl

7h 54m

1 stop

YTZ10:07 amToronto Island

$474

United Airlines

Oct 1

YTZ12:15 pmToronto Island

9h 37m

1 stop

SEA6:52 pmSeattle/Tacoma Intl

Oct 3

SEA1:22 pmSeattle/Tacoma Intl

17h 45m

2 stops

YTZ10:07 amToronto Island

$479

United Airlines

Aug 28

YTZ7:35 pmToronto Island

17h 00m

1 stop

SEA9:35 amSeattle/Tacoma Intl

Sep 5

SEA11:00 pmSeattle/Tacoma Intl

8h 07m

1 stop

YTZ10:07 amToronto Island

$480

Air Canada flights from Toronto Island Airport to Seattle

Our best Air Canada deals on Toronto Island Airport to Seattle flight tickets

Air Canada

Sep 21

YTZ8:55 pmToronto Island

16h 10m

2 stops

SEA10:05 amSeattle/Tacoma Intl

Sep 28

SEA7:15 pmSeattle/Tacoma Intl

12h 40m

2 stops

YTZ10:55 amToronto Island

$419

Air Canada

Sep 12

YTZ3:35 pmToronto Island

10h 12m

2 stops

SEA10:47 pmSeattle/Tacoma Intl

Sep 19

SEA7:15 pmSeattle/Tacoma Intl

12h 40m

2 stops

YTZ10:55 amToronto Island

$421

Air Canada

Oct 1

YTZ10:45 amToronto Island

14h 57m

2 stops

SEA10:42 pmSeattle/Tacoma Intl

Oct 3

SEA5:40 amSeattle/Tacoma Intl

12h 50m

2 stops

YTZ9:30 pmToronto Island

$447

momondo Fare Finder

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 Toronto Island - SEA Seattle/Tacoma Intl

YTZSEA

Toronto Island

Mon 9/21

8:55 pm-10:05 am

2 stops16h 10m

Seattle/Tacoma Intl

Mon 9/28

7:15 pm-10:55 am

2 stops12h 40m

$419

TorontoSeattle

YTZ Toronto Island - SEA Seattle/Tacoma Intl

YTZSEA

Toronto Island

Sat 9/12

3:35 pm-10:47 pm

2 stops10h 12m

Seattle/Tacoma Intl

Sat 9/19

7:15 pm-10:55 am

2 stops12h 40m

$421

TorontoSeattle

YTZ Toronto Island - SEA Seattle/Tacoma Intl

YTZSEA

Toronto Island

Thu 10/1

10:45 am-10:42 pm

2 stops14h 57m

Seattle/Tacoma Intl

Sat 10/3

5:40 am-9:30 pm

2 stops12h 50m

$447

TorontoSeattle

YTZ Toronto Island - SEA Seattle/Tacoma Intl

YTZSEA

Toronto Island

Fri 9/11

8:55 pm-10:05 am

2 stops16h 10m

Seattle/Tacoma Intl

Sat 9/19

7:15 pm-10:55 am

2 stops12h 40m

$471

Quickest round-trip

TorontoSeattle

YTZ Toronto Island - SEA Seattle/Tacoma Intl

YTZSEA

Toronto Island

Thu 10/1

12:15 pm-6:52 pm

1 stop9h 37m

Seattle/Tacoma Intl

Sat 10/3

11:13 pm-10:07 am

1 stop7h 54m

$479

TorontoSeattle

YTZ Toronto Island - SEA Seattle/Tacoma Intl

YTZSEA

Toronto Island

Sat 8/29

12:15 pm-7:07 pm

1 stop9h 52m

Seattle/Tacoma Intl

Wed 10/7

11:13 pm-10:07 am

1 stop7h 54m

$481

TorontoSeattle

YTZ Toronto Island - SEA Seattle/Tacoma Intl

YTZSEA

Toronto Island

Sat 9/5

6:55 pm-10:05 am

2 stops18h 10m

Seattle/Tacoma Intl

Wed 9/23

5:50 am-9:30 pm

2 stops12h 40m

$484

TorontoSeattle

YTZ Toronto Island - SEA Seattle/Tacoma Intl

YTZSEA

Toronto Island

Sat 8/29

1:40 pm-1:22 pm

2 stops26h 42m

Seattle/Tacoma Intl

Sat 9/5

9:35 pm-1:35 pm

1 stop13h 00m

$487

TorontoSeattle

YTZ Toronto Island - SEA Seattle/Tacoma Intl

YTZSEA

Toronto Island

Sat 8/29

1:40 pm-1:22 pm

2 stops26h 42m

Seattle/Tacoma Intl

Sat 9/5

9:35 pm-1:35 pm

1 stop13h 00m

$488

TorontoSeattle

YTZ Toronto Island - SEA Seattle/Tacoma Intl

YTZSEA

Toronto Island

Sun 9/6

9:30 am-10:42 pm

2 stops16h 12m

Seattle/Tacoma Intl

Sat 9/12

5:50 am-6:20 pm

2 stops9h 30m

$490

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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

On average, the least expensive day to fly to Seattle from Toronto Island Airport is on a Friday. momondo users have found tickets for Friday departures for as low as $440. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Toronto Island Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $804.

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

Flying to Seattle from Toronto Island Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $449 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $610. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 33m
Direct flights	None

The fastest flight from Toronto Island Airport to Seattle takes 8h 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?
There are 2064.9 mi between Toronto Island and Seattle/Tacoma Intl. 8h 33m is a normal flight duration for this route.
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 were last updated today.
How old do you have to be to fly from Toronto Island Airport to Seattle/Tacoma Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Kent

Lynnwood

Redmond

Lakewood

Puyallup

Fife

Federal Way

Tukwila

Cle Elum

Marysville

Kirkland

Centralia

Shoreline

Lacey

Why use momondo?

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

It is quick and easy to find Toronto to Seattle flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seattle that suits you.

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

Flights from Toronto to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for Toronto to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for Toronto to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.