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Cheap flights from Ontario to Seattle from C$ 215

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
17 Dec — 24 Dec1
1 adult

Cheap flight deals from Ontario to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (CAON) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 December 2024.

Round-trip from

C$ 358

One-way from

C$ 215
WestJet
  • WestJet
  • 10/1-14/1
  • 3 total stops
  • 21h 11m total
  • Ontario to Seattle
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Air Canada
  • Air Canada
  • 16/1
  • 1 total stop
  • 9h 30m total
  • Ontario to Seattle
Search Deals

Find flight deals from Ontario to Seattle

Cheapest flights from Ontario to Seattle
Explore the most affordable flight options available from Ontario to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 December 2024.

Thu 26/124:22 p.m.YYZ - SEA
Nonstop5h 20mAlaska Airlines
Wed 8/17:27 a.m.SEA - YYZ
Nonstop4h 38mAlaska Airlines
Deal found 11/12C$ 516
Mon 16/128:00 p.m.YYZ - SEA
1 stop21h 53mMultiple Airlines
Mon 6/12:16 p.m.SEA - YYZ
1 stop12h 39mMultiple Airlines
Deal found 11/12C$ 591
Wed 18/127:40 a.m.YYZ - SEA
1 stop9h 41mWestJet
Sat 18/13:20 p.m.SEA - YYZ
2 stops11h 40mWestJet
Deal found 11/12C$ 606
Wed 18/126:14 a.m.YYZ - SEA
1 stop9h 50mAmerican Airlines
Tue 7/110:18 p.m.SEA - YYZ
1 stop9h 47mAmerican Airlines
Deal found 11/12C$ 629
Wed 25/126:30 a.m.YYZ - SEA
1 stop9h 15mDelta
Wed 8/16:00 a.m.SEA - YYZ
1 stop7h 12mDelta
Deal found 11/12C$ 683
Thu 26/124:00 p.m.YOW - SEA
1 stop8h 20mAir Canada
Sun 29/125:45 a.m.SEA - YOW
1 stop7h 15mAir Canada
Deal found 12/12C$ 701
Thu 19/126:30 a.m.YYZ - SEA
1 stop10h 45mUnited Airlines
Mon 6/111:15 p.m.SEA - YYZ
1 stop7h 43mUnited Airlines
Deal found 11/12C$ 707
Tue 24/125:30 a.m.YOW - SEA
1 stop18h 50mUnited Airlines
Thu 2/16:05 a.m.SEA - YOW
1 stop12h 32mUnited Airlines
Deal found 11/12C$ 806
Thu 26/125:45 p.m.YOW - SEA
2 stops19h 27mWestJet
Sun 29/129:55 p.m.SEA - YOW
2 stops15h 53mWestJet
Deal found 12/12C$ 829
Thu 26/122:15 p.m.YUL - SEA
1 stop10h 05mAir Canada
Wed 1/16:05 a.m.SEA - YUL
1 stop9h 48mAir Canada
Deal found 11/12C$ 892
Mon 23/126:05 p.m.YHM - SEA
2 stops21h 40mWestJet
Wed 1/19:25 a.m.SEA - YHM
2 stops28h 53mWestJet
Deal found 12/12C$ 916
Wed 18/126:45 a.m.YUL - SEA
2 stops28h 20mWestJet
Mon 30/129:25 a.m.SEA - YUL
2 stops12h 15mWestJet
Deal found 11/12C$ 919

Find flights from Ontario to Seattle within your budget

Customize your flight search to find flights from Ontario 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, Cheapflights users made 639,787 searches. Data last updated 12 December 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 10/1

7:55 a.m.-2:21 p.m.

1 stop9h 26m

Seattle/Tacoma Intl

Tue 14/1

3:15 p.m.-6:00 a.m.

2 stops11h 45m

C$ 358

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 18/2

3:05 p.m.-10:00 p.m.

1 stop9h 55m

Seattle/Tacoma Intl

Mon 24/2

3:05 p.m.-12:57 a.m.

1 stop6h 52m

C$ 361

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 11/1

3:30 p.m.-11:10 p.m.

1 stop10h 40m

Seattle/Tacoma Intl

Sat 18/1

6:05 a.m.-1:50 p.m.

Nonstop4h 45m

C$ 368

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 9/1

4:20 p.m.-6:43 p.m.

Nonstop5h 23m

Seattle/Tacoma Intl

Sun 19/1

7:27 a.m.-3:05 p.m.

Nonstop4h 38m

C$ 375

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 28/1

7:45 a.m.-2:24 p.m.

1 stop9h 39m

Seattle/Tacoma Intl

Sat 1/2

11:05 p.m.-9:20 a.m.

1 stop7h 15m

C$ 377

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 26/1

8:10 p.m.-8:50 a.m.

1 stop15h 40m

Seattle/Tacoma Intl

Wed 29/1

7:27 a.m.-3:05 p.m.

Nonstop4h 38m

C$ 387

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Tue 4/2

8:25 a.m.-10:00 p.m.

2 stops16h 35m

Seattle/Tacoma Intl

Fri 7/2

5:45 a.m.-6:43 p.m.

2 stops9h 58m

C$ 395

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 11/2

5:14 p.m.-11:31 p.m.

1 stop9h 17m

Seattle/Tacoma Intl

Mon 17/2

12:59 a.m.-1:00 p.m.

1 stop9h 01m

C$ 405

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 16/1

6:30 a.m.-2:21 p.m.

1 stop10h 51m

Seattle/Tacoma Intl

Sun 19/1

3:15 p.m.-1:16 a.m.

1 stop7h 01m

C$ 408

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 16/1

6:30 a.m.-2:21 p.m.

1 stop10h 51m

Seattle/Tacoma Intl

Sun 19/1

7:10 a.m.-6:15 a.m.

2 stops20h 05m

C$ 409

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

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Best time to book a flight from Ontario to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Ontario to Seattle

Get recent, data-driven insights about flights from Ontario to Seattle including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Region of Ontario to Seattle?

Currently, August is the cheapest month in which you can book a flight from Region of Ontario to Seattle (average of C$ 270). Flying from Region of Ontario to Seattle in March is currently the most expensive (average of C$ 418). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to SEA?

Find hourly flight availability from Ontario to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 December 2024.

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.

Weekly flight availability from Region of Ontario to Seattle

Explore weekly flight availability from Ontario to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 12 December 2024.

The most flights from CAON to SEA are scheduled on a Wednesday (5 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.