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$153+ Cheap flights from Ontario to Seattle (SEA)

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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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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 November 21, 2024.

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 November 21, 2024.

This Air Canada deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/167:15 pmYYZ - SEA
Nonstop5h 25mAir Canada
Wed 12/257:15 pmSEA - YYZ
1 stop7h 54mAir Canada
Deal found 11/20$271
This Delta deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/165:04 pmYYZ - SEA
1 stop8h 21mDelta
Wed 12/258:30 amSEA - YYZ
1 stop11h 38mDelta
Deal found 11/20$272
This Trip.com deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/276:30 amYYZ - SEA
1 stop10h 51mWestJet
Wed 12/43:15 pmSEA - YYZ
1 stop18h 24mWestJet
Deal found 11/20$298
This Kiwi.com deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/48:00 pmYYZ - SEA
1 stop15h 57mMultiple Airlines
Wed 12/114:00 pmSEA - YYZ
1 stop11h 46mMultiple Airlines
Deal found 11/19$304
This Alaska Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/164:20 pmYYZ - SEA
Nonstop5h 19mAlaska Airlines
Wed 12/257:26 amSEA - YYZ
Nonstop4h 41mAlaska Airlines
Deal found 11/20$384
This Kiwi.com deal was found by Cheapflights users on 11/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/76:45 amYUL - SEA
2 stops16h 41mMultiple Airlines
Mon 12/99:21 pmSEA - YUL
1 stop16h 14mMultiple Airlines
Deal found 11/21$398
This United Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/246:55 pmYYZ - SEA
Nonstop5h 25mUnited Airlines
Tue 12/317:00 amSEA - YYZ
1 stop13h 06mUnited Airlines
Deal found 11/20$411
This CheapTicketsDeal deal was found by Cheapflights users on 11/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapTicketsDeal is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/286:30 amYKF - SEA
1 stop10h 51mWestJet
Wed 12/113:15 pmSEA - YKF
1 stop7h 01mWestJet
Deal found 11/21$443
This American Airlines deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/114:05 pmYYZ - SEA
1 stop9h 16mAmerican Airlines
Thu 12/1212:15 amSEA - YYZ
1 stop9h 18mAmerican Airlines
Deal found 11/19$491
This Air Canada deal was found by Cheapflights users on 11/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1912:15 pmYUL - SEA
1 stop12h 05mAir Canada
Thu 12/265:45 amSEA - YUL
1 stop8h 18mAir Canada
Deal found 11/21$527
This American Airlines deal was found by Cheapflights users on 11/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/77:14 amYUL - SEA
1 stop14h 51mAmerican Airlines
Tue 12/1010:19 pmSEA - YUL
1 stop21h 17mAmerican Airlines
Deal found 11/21$538
This FlightHub deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/216:15 amYOW - SEA
1 stop11h 06mWestJet
Thu 11/283:15 pmSEA - YOW
2 stops11h 18mWestJet
Deal found 11/20$555

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 2,612,795 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 1/20

6:40 pm-11:16 am

1 stop19h 36m

Seattle/Tacoma Intl

Mon 1/27

6:05 am-1:50 pm

Nonstop4h 45m

$261

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 1/28

7:55 am-2:21 pm

1 stop9h 26m

Seattle/Tacoma Intl

Sun 2/2

3:15 pm-6:17 am

1 stop12h 02m

$263

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 1/9

6:00 am-10:45 am

1 stop7h 45m

Seattle/Tacoma Intl

Thu 1/16

6:00 am-7:09 pm

1 stop10h 09m

$267

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 3/6

7:05 pm-9:30 pm

Nonstop5h 25m

Seattle/Tacoma Intl

Tue 3/11

10:35 am-10:22 pm

1 stop8h 47m

$271

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 1/9

3:30 pm-11:09 pm

2 stops10h 39m

Seattle/Tacoma Intl

Tue 1/14

9:00 am-10:49 pm

2 stops10h 49m

$277

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 1/9

5:00 pm-12:50 am

1 stop10h 50m

Seattle/Tacoma Intl

Thu 1/16

7:27 am-3:05 pm

Nonstop4h 38m

$286

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Thu 1/9

8:25 pm-2:30 pm

2 stops21h 05m

Seattle/Tacoma Intl

Thu 1/16

3:05 pm-9:38 am

2 stops15h 33m

$314

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Fri 1/24

9:30 pm-10:00 am

2 stops15h 30m

Seattle/Tacoma Intl

Sun 1/26

11:30 am-6:15 am

2 stops15h 45m

$346

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 1/9

6:55 pm-2:21 pm

1 stop22h 26m

Seattle/Tacoma Intl

Wed 1/15

3:36 pm-4:48 pm

1 stop22h 12m

$372

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 2/21

6:00 am-12:31 pm

1 stop9h 31m

Seattle/Tacoma Intl

Mon 3/3

12:40 am-1:00 pm

1 stop9h 20m

$390

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 52 results
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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, January is the cheapest month in which you can book a flight from Region of Ontario to Seattle (average of $238). Flying from Region of Ontario to Seattle in July is currently the most expensive (average of $411). 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 November 21, 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.

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 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

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

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated November 21, 2024.
Read reviews from past customers who have flown WestJet, Delta and Air Canada from Ontario to Seattle. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,464 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.2

Reviews

1 / 10

It was the first time I have flown Alaska and I don’t think I can recommend it to others. It was so hot on the plane, food was preordered but I never received it.

Alaska Airlines
8.0
Very good
9,464 reviews
Alaska Airlines
8.0
Very good
9,464 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.2

Reviews

1 / 10

It was the first time I have flown Alaska and I don’t think I can recommend it to others. It was so hot on the plane, food was preordered but I never received it.

Delta
8.0
Very good
8,755 reviews
Alaska Airlines
8.0
Very good
9,464 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.2

Reviews

1 / 10

It was the first time I have flown Alaska and I don’t think I can recommend it to others. It was so hot on the plane, food was preordered but I never received it.

United Airlines
7.4
Good
9,172 reviews
Alaska Airlines
8.0
Very good
9,464 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.2

Reviews

1 / 10

It was the first time I have flown Alaska and I don’t think I can recommend it to others. It was so hot on the plane, food was preordered but I never received it.

WestJet
7.3
Good
2,811 reviews
Alaska Airlines
8.0
Very good
9,464 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.2

Reviews

1 / 10

It was the first time I have flown Alaska and I don’t think I can recommend it to others. It was so hot on the plane, food was preordered but I never received it.

American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,464 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.2

Reviews

1 / 10

It was the first time I have flown Alaska and I don’t think I can recommend it to others. It was so hot on the plane, food was preordered but I never received it.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Ontario to Seattle.

  • What are the cheapest airlines to fly from Region of Ontario to Seattle one-way?

    $153 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on WestJet and Delta, with prices starting from $157 and $161, respectively.

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

    When deciding which route to take from Region of Ontario to Seattle consider Toronto Pearson Intl - Seattle/Tacoma Intl, Montreal Pierre Elliott Trudeau Intl - Seattle/Tacoma Intl or London - Seattle/Tacoma Intl as they are the most popular.

  • What are the most reliable airlines from Region of Ontario to Seattle?

    No one likes to see their flight delayed. When booking a flight from Region of Ontario to Seattle consider choosing Brussels Airlines (100%), Alaska Airlines (95%) or Hawaiian Airlines (94%) as they are the most reliable in getting you off to your destination on time.

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

    On average you can expect to pay $777 for a flight from Region of Ontario to Seattle. The cheapest flight overall is $149 while the most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl) is currently priced at $267.

  • Can I find deals for flights from Ontario to Seattle that include hotel bookings?

    Yes. In addition to deals on Ontario to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Seattle.

  • Can I find deals for business class flights from Ontario to Seattle?

    Yes. Cheapflights offers flight deals from Ontario to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, January is the cheapest month in which you can book a flight from Region of Ontario to Seattle (average of $238). Flying from Region of Ontario to Seattle in July is currently the most expensive (average of $411). 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.

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Alternative routes for Ontario to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Ontario to Seattle

Discover the top 6 airlines that operate flights from Ontario to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,612,795 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$163Average$475FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$248Average$414FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$287Average$527FlexibilityNo cancel feeOn-time69%
DeltaCheapest$292Average$475FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$301Average$462FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$402Average$695FlexibilityNo cancel feeOn-time71%
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