What are the most popular airlines that fly from Region of Ontario to Seattle?

The most popular airlines flying from Region of Ontario to Seattle are Endeavor Airlines, American Airlines and Air Canada. Something to consider prior to booking your flight.

What are the most popular routes from Region of Ontario to Seattle?

The most popular route from Region of Ontario to Seattle is Toronto Pearson Intl - Seattle/Tacoma Intl. You may also consider Hamilton - Seattle/Tacoma Intl or Toronto Island - Seattle/Tacoma Intl.

What are the cheapest flights from Region of Ontario to Seattle?

Looking at all options, your cheapest flight can be booked for C$ 280. While the most popular route (Toronto Pearson Intl - Seattle/Tacoma Intl) can be booked for C$ 393 on average our data indicates C$ 599 when flying from Region of Ontario to Seattle.

Can I find flights from Region of Ontario to Seattle for under C$ 400 on Cheapflights?

Yes, there are multiple flights from Region of Ontario to Seattle for under C$ 400. The cheapest flight booked recently is on Multiple Airlines for just C$ 361, but on average you can expect to pay C$ 447.

Are there direct flights from Region of Ontario to Seattle for under C$ 600 on Cheapflights?

Cheapflights has 20 direct flights from Region of Ontario to Seattle under C$ 600. A good price for a direct flight from Region of Ontario to Seattle is less than C$ 671.

Are there last-minute flights available from Region of Ontario to Seattle for under C$ 500?

There are currently 20+ open flights from Region of Ontario to Seattle within the next 7 days for less than C$ 500.

Which airlines flying from Ontario to Seattle/Tacoma Intl have flexible cancellations due to COVID-19?

Due to the rapidly changing circumstances due to COVID-19, airlines like Air Canada, United Airlines, and WestJet flying from Ontario to Seattle/Tacoma Intl have implemented new flexible cancellation policies.

How far in advance should I book a flight from Region of Ontario to Seattle?

To save up to 35% on this flight, we recommend booking at least 28 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Region of Ontario to Seattle from C$ 802 1-2 weeks out and tickets from C$ 986 for flights departing within the next 72 hours.

What is the cheapest month to fly from Region of Ontario to Seattle?

Our data shows that January tends to be the cheapest month to fly to Seattle from Region of Ontario. Users have commonly found prices around C$ 696 for the month, but tickets can be as low as C$ 417. Due to multiple factors, prepare for potentially higher prices in July.

When is the cheapest time to fly from Region of Ontario to Seattle (ON - SEA)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to Seattle as you normally would.

What airport do you fly into for flights to Seattle from Ontario?

Located just 18.4 km from the city centre, Seattle/Tacoma Intl (SEA) is the airport most travelers will use when flying to Seattle from Ontario.

Cheap Flights from Ontario to Seattle from C$ 216

Cheap flights from Ontario to Seattle in June, July 2023

These are some of the best deals we've found on flights to Seattle in 2023 at this time. If these deals don't appeal to you, be sure to come back soon for more options.

7 Jun. - 21 Jun.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

15h 04m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

2 stops

33h 22m

C$ 486

Multiple Airlines

Deal found 31/5

24 Jul. - 1 Aug.

YKF

Toronto Kitchener-Waterloo

SEA

Seattle/Tacoma Intl

1 stop

20h 19m

SEA

Seattle/Tacoma Intl

YKF

Toronto Kitchener-Waterloo

1 stop

26h 24m

C$ 498

WestJet

Deal found 31/5

12 Jun. - 14 Jun.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

1 stop

16h 59m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

2 stops

31h 51m

C$ 505

Multiple Airlines

Deal found 31/5

18 Jun. - 2 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

2 stops

12h 34m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

20h 20m

C$ 524

WestJet

Deal found 31/5

11 Jun. - 9 Dec.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

2 stops

12h 34m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

14h 35m

C$ 527

Multiple Airlines

Deal found 1/6

17 Jun. - 2 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

15h 14m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

7h 37m

C$ 550

WestJet

Deal found 31/5

17 Jun. - 1 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

17h 00m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

7h 07m

C$ 553

WestJet

Deal found 31/5

18 Jun. - 2 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

13h 39m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

7h 37m

C$ 554

WestJet

Deal found 31/5

16 Jun. - 20 Jun.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

1 stop

18h 27m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

7h 48m

C$ 555

Air Canada

Deal found 1/6

Ontario to Seattle 2023 flight deals

These are some of the best deals we've found on flights to Seattle in 2023 at this time. If these deals don't appeal to you, be sure to come back soon for more options.

28 Sep. - 11 Oct.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

1 stop

13h 04m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

6h 55m

C$ 361

Multiple Airlines

Deal found 31/5

20 Sep. - 28 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

14h 49m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

7h 35m

C$ 393

Multiple Airlines

Deal found 31/5

12 Oct. - 23 Oct.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

13h 59m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

7h 35m

C$ 400

Multiple Airlines

Deal found 31/5

11 Sep. - 20 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

8h 59m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

7h 35m

C$ 407

Multiple Airlines

Deal found 1/6

19 Sep. - 21 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

8h 59m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

7h 35m

C$ 410

Multiple Airlines

Deal found 30/5

20 Sep. - 24 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

14h 49m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

7h 53m

C$ 411

Multiple Airlines

Deal found 1/6

11 Sep. - 23 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

8h 59m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

7h 35m

C$ 419

Multiple Airlines

Deal found 1/6

14 Oct. - 20 Oct.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

14h 49m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

7h 35m

C$ 426

Multiple Airlines

Deal found 30/5

11 Sep. - 14 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

8h 59m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

7h 20m

C$ 447

Multiple Airlines

Deal found 1/6

Cheap United Airlines flights from Ontario to Seattle

Find some of the cheapest United Airlines flights travelling from Ontario to Seattle. Make sure to check back often as deals are often changing.

26 Aug. - 29 Aug.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

1 stop

8h 42m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

12h 28m

C$ 610

United Airlines

Deal found 30/5

26 Aug. - 29 Aug.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

2 stops

11h 07m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

12h 28m

C$ 629

United Airlines

Deal found 30/5

19 Aug. - 27 Aug.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

1 stop

9h 46m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

12h 28m

C$ 645

United Airlines

Deal found 31/5

19 Aug. - 28 Aug.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

2 stops

18h 51m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

2 stops

18h 43m

C$ 692

United Airlines

Deal found 31/5

19 Aug. - 27 Aug.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

2 stops

16h 11m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

12h 28m

C$ 700

United Airlines

Deal found 31/5

5 Aug. - 12 Aug.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

2 stops

17h 59m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

12h 28m

C$ 701

United Airlines

Deal found 1/6

8 Jun. - 12 Jun.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

1 stop

18h 07m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

11h 53m

C$ 716

United Airlines

Deal found 30/5

5 Aug. - 13 Aug.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

2 stops

17h 59m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

12h 48m

C$ 720

United Airlines

Deal found 1/6

10 Jul. - 10 Jul.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

2 stops

16h 11m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

14h 46m

C$ 743

United Airlines

Deal found 31/5

Cheap Air Canada flights from Ontario to Seattle

Take a gander at the lowest prices we've found on Air Canada flights from Ontario to Seattle. Make sure to examine the flight information before completing your reservation.

16 Jun. - 20 Jun.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

1 stop

18h 27m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

7h 48m

C$ 555

Air Canada

Deal found 1/6

28 Jun. - 8 Jul.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

1 stop

14h 25m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

7h 48m

C$ 560

Air Canada

Deal found 1/6

30 Sep. - 31 Oct.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

1 stop

14h 23m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

6h 53m

C$ 613

Air Canada

Deal found 1/6

22 Aug. - 30 Aug.

YTZ

Toronto Island

SEA

Seattle/Tacoma Intl

1 stop

8h 54m

SEA

Seattle/Tacoma Intl

YTZ

Toronto Island

1 stop

7h 19m

C$ 634

Air Canada

Deal found 31/5

19 Aug. - 29 Aug.

YTZ

Toronto Island

SEA

Seattle/Tacoma Intl

1 stop

8h 54m

SEA

Seattle/Tacoma Intl

YTZ

Toronto Island

1 stop

7h 19m

C$ 667

Air Canada

Deal found 31/5

30 Jun. - 7 Jul.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

1 stop

14h 25m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

7h 48m

C$ 698

Air Canada

Deal found 1/6

23 Jun. - 1 Jul.

YOW

Ottawa

SEA

Seattle/Tacoma Intl

1 stop

14h 25m

SEA

Seattle/Tacoma Intl

YOW

Ottawa

1 stop

8h 32m

C$ 702

Air Canada

Deal found 31/5

22 Nov. - 26 Nov.

YTZ

Toronto Island

SEA

Seattle/Tacoma Intl

1 stop

8h 44m

SEA

Seattle/Tacoma Intl

YTZ

Toronto Island

1 stop

21h 11m

C$ 1,002

Air Canada

Deal found 31/5

6 Jun. - 13 Jun.

YTZ

Toronto Island

SEA

Seattle/Tacoma Intl

1 stop

9h 12m

SEA

Seattle/Tacoma Intl

YTZ

Toronto Island

1 stop

10h 19m

C$ 1,480

Air Canada

Deal found 1/6

Direct flights to Seattle from Ontario

For a shorter flight, select one of these non-stop flights from Ontario to Seattle. Those looking to potentially save on 1 or 2-stop flights from Ontario to Seattle should utilize the search form at the top of the page.

19 Sep. - 21 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

Nonstop

5h 22m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

Nonstop

4h 39m

C$ 585

United Airlines

Deal found 31/5

11 Sep. - 23 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

Nonstop

5h 22m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

Nonstop

4h 39m

C$ 596

Air Canada

Deal found 1/6

8 Sep. - 11 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

Nonstop

5h 22m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

Nonstop

4h 39m

C$ 598

United Airlines

Deal found 30/5

20 Sep. - 24 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

Nonstop

5h 22m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

Nonstop

4h 39m

C$ 607

Air Canada

Deal found 1/6

13 Sep. - 20 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

Nonstop

5h 22m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

Nonstop

4h 39m

C$ 632

Multiple Airlines

Deal found 1/6

10 Sep. - 13 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

Nonstop

5h 22m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

Nonstop

4h 39m

C$ 641

Air Canada

Deal found 31/5

13 Sep. - 15 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

Nonstop

5h 22m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

Nonstop

4h 39m

C$ 655

Air Canada

Deal found 1/6

22 Jun. - 27 Jun.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

Nonstop

5h 22m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

Nonstop

4h 39m

C$ 659

United Airlines

Deal found 31/5

2 Sep. - 9 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

Nonstop

5h 22m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

Nonstop

4h 39m

C$ 662

United Airlines

Deal found 31/5

Last minute flights from Ontario to Seattle

Book one of these great deals on flights from Ontario to Seattle. It's wise to confirm all flight details are correct before booking.

7 Jun. - 21 Jun.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

15h 04m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

2 stops

33h 22m

C$ 486

Multiple Airlines

Deal found 31/5

11 Jun. - 9 Dec.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

2 stops

12h 34m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

14h 35m

C$ 527

Multiple Airlines

Deal found 1/6

11 Jun. - 9 Dec.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

12h 34m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

14h 35m

C$ 568

Multiple Airlines

Deal found 1/6

7 Jun. - 14 Jun.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

15h 04m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

2 stops

14h 41m

C$ 589

Multiple Airlines

Deal found 30/5

10 Jun. - 17 Jun.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

15h 14m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

2 stops

12h 15m

C$ 599

Multiple Airlines

Deal found 31/5

6 Jun. - 16 Jun.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

15h 14m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

2 stops

14h 41m

C$ 617

Multiple Airlines

Deal found 31/5

8 Jun. - 12 Jun.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

13h 39m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

2 stops

13h 15m

C$ 618

Multiple Airlines

Deal found 30/5

7 Jun. - 21 Jun.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

23h 34m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

8h 48m

C$ 636

WestJet

Deal found 31/5

7 Jun. - 26 Jun.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

2 stops

12h 34m

SEA

Seattle/Tacoma Intl

YYZ

Toronto Pearson Intl

1 stop

7h 09m

C$ 637

WestJet

Deal found 31/5

One-way flights to Seattle from Ontario

Some of the best available deals we've found on one-way flights from Ontario to Seattle. Users in need of a round-trip flight from Ontario to Seattle instead should update the search form at the top of page.

7 Jun.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

2 stops

12h 34m

C$ 216

WestJet

Deal found 31/5

20 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

14h 49m

C$ 218

Multiple Airlines

Deal found 31/5

12 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

16h 45m

C$ 219

Multiple Airlines

Deal found 30/5

26 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

14h 49m

C$ 222

Multiple Airlines

Deal found 31/5

12 Sep.

YKF

Toronto Kitchener-Waterloo

SEA

Seattle/Tacoma Intl

1 stop

15h 34m

C$ 229

Multiple Airlines

Deal found 30/5

12 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

2 stops

16h 50m

C$ 238

Multiple Airlines

Deal found 1/6

12 Sep.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

14h 49m

C$ 242

Multiple Airlines

Deal found 1/6

7 Jun.

YKF

Toronto Kitchener-Waterloo

SEA

Seattle/Tacoma Intl

1 stop

28h 39m

C$ 244

WestJet

Deal found 31/5

7 Jun.

YYZ

Toronto Pearson Intl

SEA

Seattle/Tacoma Intl

1 stop

23h 34m

C$ 246

WestJet

Deal found 31/5

Find flights from Ontario to Seattle within your budget

Fly from

Fly to

Budget

C$ 361 - C$ 610

Route

Depart

Return

Price

OttawaSeattle/Tacoma Intl

YOW - SEA

YOWSEA

Ottawa

Thu 28/9

1 stop13h 04m

Seattle/Tacoma Intl

Wed 11/10

1 stop6h 55m

C$ 361

Pick Dates

Toronto Pearson IntlSeattle/Tacoma Intl

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 20/9

1 stop14h 49m

Seattle/Tacoma Intl

Thu 28/9

1 stop7h 35m

C$ 393

Pick Dates

Toronto Pearson IntlSeattle/Tacoma Intl

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 12/10

1 stop13h 59m

Seattle/Tacoma Intl

Mon 23/10

1 stop7h 35m

C$ 400

Pick Dates

Toronto Pearson IntlSeattle/Tacoma Intl

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 11/9

1 stop8h 59m

Seattle/Tacoma Intl

Wed 20/9

1 stop7h 35m

C$ 407

Pick Dates

Toronto Pearson IntlSeattle/Tacoma Intl

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 19/9

1 stop8h 59m

Seattle/Tacoma Intl

Thu 21/9

1 stop7h 35m

C$ 410

Pick Dates

Toronto Pearson IntlSeattle/Tacoma Intl

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 9/8

1 stop7h 59m

Seattle/Tacoma Intl

Wed 20/9

1 stop7h 37m

C$ 479

Pick Dates

Toronto Pearson IntlSeattle/Tacoma Intl

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 9/8

2 stops12h 34m

Seattle/Tacoma Intl

Wed 20/9

2 stops14h 02m

C$ 485

Pick Dates

OttawaSeattle/Tacoma Intl

YOW - SEA

YOWSEA

Ottawa

Fri 16/6

1 stop18h 27m

Seattle/Tacoma Intl

Tue 20/6

1 stop7h 48m

C$ 555

Pick Dates

OttawaSeattle/Tacoma Intl

YOW - SEA

YOWSEA

Ottawa

Sat 26/8

1 stop8h 42m

Seattle/Tacoma Intl

Tue 29/8

1 stop12h 28m

C$ 610

Pick Dates

Flights are sorted by cheapest first

Deals found on 31/5

Related info for your journey

YYZ stands for Toronto Pearson Intl Airport, while SEA stands for Seattle/Tacoma Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Ottawa Airport (YOW), Toronto Island Airport (YTZ), Hamilton Airport (YHM), London Airport (YXU), Toronto Kitchener-Waterloo Airport (YKF) are some additional IATA codes for airports related to your trip.

Flights to Seattle from Ontario

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Departure points for flights from Ontario to Seattle

Flights from Pearson Intl to Seattlefrom C$ 587 pp

Top 6 airlines flying from Ontario to Seattle

Airline	Cheapest	Average	Flexibility	On-time	COVID-19 safety
WestJet	CheapestC$ 288	AverageC$ 633	FlexibilityNo cancel fee	On-time60%	COVID-19 safety	Search WestJet flights
United Airlines	CheapestC$ 382	AverageC$ 758	FlexibilityNo cancel fee	On-time69%	COVID-19 safety	Search United Airlines flights
Air Canada	CheapestC$ 443	AverageC$ 768	FlexibilityNo cancel fee	On-time67%	COVID-19 safety	Search Air Canada flights
Delta	CheapestC$ 467	AverageC$ 686	FlexibilityNo cancel fee	On-timeN/A	COVID-19 safety	Search Delta flights
American Airlines	CheapestC$ 502	AverageC$ 696	FlexibilityNo cancel fee	On-time71%	COVID-19 safety	Search American Airlines flights
Endeavor Airlines	CheapestC$ 764	AverageC$ 908	FlexibilityNo cancel fee	On-timeN/A	COVID-19 safety	Search Endeavor Airlines flights

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Hourly flight availability from Ontario to Seattle

0%of flight departures	Early morningMidnight to 6 am
50%of flight departures	Morning6 am to noon
50%of flight departures	AfternoonNoon to 6 pm
0%of flight departures	Evening6 pm to midnight

Midnight

6 AM

Noon

6 PM

Cheap flights from Ontario to Seattle from C$ 216

This is the cheapest one-way flight price, found on 31/5. Prices may vary by date and flight preferences.

How far in advance should I book a flight from Region of Ontario to Seattle?

What is the cheapest month to fly from Region of Ontario to Seattle?

When is the cheapest time to fly from Region of Ontario to Seattle (ON - SEA)?

Cheap flights from Ontario to Seattle in June, July 2023

The best prices found for Ontario to SEA flights for June, July

These are some of the best deals we've found on flights to Seattle in 2023 at this time. If these deals don't appeal to you, be sure to come back soon for more options.

Ontario to Seattle 2023 flight deals

Cheap flights to Seattle from Ontario found for this year

These are some of the best deals we've found on flights to Seattle in 2023 at this time. If these deals don't appeal to you, be sure to come back soon for more options.

Cheap United Airlines flights from Ontario to Seattle

Find some of the cheapest United Airlines flights travelling from Ontario to Seattle. Make sure to check back often as deals are often changing.

Cheap Air Canada flights from Ontario to Seattle

Take a gander at the lowest prices we've found on Air Canada flights from Ontario to Seattle. Make sure to examine the flight information before completing your reservation.

Direct flights to Seattle from Ontario

Save time with Ontario to Seattle direct flight deals

For a shorter flight, select one of these non-stop flights from Ontario to Seattle. Those looking to potentially save on 1 or 2-stop flights from Ontario to Seattle should utilize the search form at the top of the page.

Last minute flights from Ontario to Seattle

Late deals on round-trip flights to Seattle from Ontario, departing today and this week

Book one of these great deals on flights from Ontario to Seattle. It's wise to confirm all flight details are correct before booking.

One-way flights to Seattle from Ontario

The cheapest one-way flights from Ontario to Seattle

Some of the best available deals we've found on one-way flights from Ontario to Seattle. Users in need of a round-trip flight from Ontario to Seattle instead should update the search form at the top of page.

Find flights from Ontario to Seattle within your budget

Use the slider to find flights from Ontario to Seattle that fit your budget.

Related info for your journey

Useful info, stats and facts about Ontario to Seattle flights.

What airport do you fly into for flights to Seattle from Ontario?

Which airlines flying from Ontario to Seattle/Tacoma Intl have flexible cancellations due to COVID-19?

Can I find flights from Region of Ontario to Seattle for under C$ 400 on Cheapflights?

Are there direct flights from Region of Ontario to Seattle for under C$ 600 on Cheapflights?

Are there last-minute flights available from Region of Ontario to Seattle for under C$ 500?

What are the most popular routes from Region of Ontario to Seattle?

What are the most popular airlines that fly from Region of Ontario to Seattle?

What are the cheapest flights from Region of Ontario to Seattle?

What does YYZ to SEA mean?

Flights to Seattle from Ontario

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Departure points for flights from Ontario to Seattle

Select to see more specific information for flights to Seattle from all departure points in Ontario

Top 6 airlines flying from Ontario to Seattle

The chart below displays the airlines Cheapflights users travelling from Ontario to Seattle choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.

Popular flight searches

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Hourly flight availability from Ontario to Seattle

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