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Cheap flights from Ontario to Seattle from C$ 216

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
27 Dec — 3 Jan1
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 22 December 2024.

Round-trip from

C$ 366

One-way from

C$ 216
12/1-21/1
  • 12/1-21/1
  • 2 total stops
  • 25h 37m total
  • Ontario to Seattle
Search Deals
12/1
  • 12/1
  • 2 total stops
  • 22h 07m 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 22 December 2024.

Tue 24/126:15 a.m.YYZ - SEA
1 stop9h 30mAmerican Airlines
Sat 1/27:14 a.m.SEA - YYZ
1 stop12h 29mAmerican Airlines
Deal found 21/12C$ 723
Mon 23/121:50 p.m.YYZ - SEA
1 stop27h 31mMultiple Airlines
Fri 10/19:57 a.m.SEA - YYZ
2 stops17h 21mMultiple Airlines
Deal found 21/12C$ 808
Tue 24/124:22 p.m.YYZ - SEA
Nonstop5h 20mAlaska Airlines
Sat 1/27:27 a.m.SEA - YYZ
Nonstop4h 38mAlaska Airlines
Deal found 21/12C$ 809
Tue 24/123:05 p.m.YYZ - SEA
1 stop9h 55mAir Canada
Sat 1/26:05 a.m.SEA - YYZ
Nonstop4h 45mAir Canada
Deal found 21/12C$ 829
Sat 28/126:30 a.m.YYZ - SEA
1 stop9h 15mWestJet
Thu 2/19:25 a.m.SEA - YYZ
1 stop8h 29mWestJet
Deal found 21/12C$ 855
Tue 24/124:00 p.m.YOW - SEA
1 stop8h 20mAir Canada
Thu 2/16:05 a.m.SEA - YOW
1 stop8h 17mAir Canada
Deal found 21/12C$ 874
Tue 31/126:00 a.m.YOW - SEA
1 stop18h 20mUnited Airlines
Fri 3/15:00 a.m.SEA - YOW
2 stops13h 37mUnited Airlines
Deal found 22/12C$ 878
Tue 24/126:00 a.m.YOW - SEA
2 stops13h 11mMultiple Airlines
Thu 2/16:05 a.m.SEA - YOW
1 stop8h 17mMultiple Airlines
Deal found 21/12C$ 881
Tue 24/125:45 p.m.YOW - SEA
2 stops22h 00mWestJet
Thu 2/19:25 a.m.SEA - YOW
2 stops12h 20mWestJet
Deal found 21/12C$ 941
Fri 27/127:00 a.m.YUL - SEA
1 stop13h 13mDelta
Mon 13/111:05 p.m.SEA - YUL
1 stop11h 40mDelta
Deal found 21/12C$ 971
Sat 28/126:45 a.m.YUL - SEA
2 stops28h 20mWestJet
Sat 4/15:30 p.m.SEA - YUL
2 stops28h 10mWestJet
Deal found 20/12C$ 980
Sun 22/127:05 p.m.YHM - SEA
1 stop22h 16mWestJet
Sun 29/123:20 p.m.SEA - YHM
1 stop22h 53mWestJet
Deal found 21/12C$ 1,109

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 629,999 searches. Data last updated 22 December 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 12/1

7:25 p.m.-8:57 a.m.

1 stop16h 32m

Seattle/Tacoma Intl

Tue 21/1

9:45 a.m.-9:50 p.m.

1 stop9h 05m

C$ 366

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 15/4

4:30 p.m.-6:50 p.m.

Nonstop5h 20m

Seattle/Tacoma Intl

Mon 21/4

7:00 a.m.-2:40 p.m.

Nonstop4h 40m

C$ 368

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 9/2

6:30 a.m.-3:45 p.m.

1 stop12h 15m

Seattle/Tacoma Intl

Wed 12/3

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

Nonstop4h 45m

C$ 369

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 10/2

1:20 p.m.-10:25 p.m.

1 stop12h 05m

Seattle/Tacoma Intl

Mon 10/3

10:55 p.m.-11:55 a.m.

1 stop10h 00m

C$ 371

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Sat 1/2

6:25 p.m.-2:30 p.m.

2 stops23h 05m

Seattle/Tacoma Intl

Wed 5/2

5:45 a.m.-8:43 p.m.

2 stops11h 58m

C$ 415

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 17/1

11:00 p.m.-9:50 a.m.

1 stop13h 50m

Seattle/Tacoma Intl

Sat 18/1

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

1 stop6h 52m

C$ 424

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 17/1

8:40 p.m.-10:00 a.m.

1 stop16h 20m

Seattle/Tacoma Intl

Mon 20/1

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

2 stops11h 45m

C$ 427

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Thu 23/1

5:45 p.m.-2:21 p.m.

1 stop23h 36m

Seattle/Tacoma Intl

Mon 27/1

11:30 a.m.-7:23 p.m.

2 stops28h 53m

C$ 428

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Wed 8/1

6:10 p.m.-9:47 a.m.

1 stop18h 37m

Seattle/Tacoma Intl

Sun 19/1

3:15 p.m.-8:50 p.m.

2 stops26h 35m

C$ 441

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 13/2

4:44 p.m.-11:06 p.m.

1 stop9h 22m

Seattle/Tacoma Intl

Mon 17/2

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

1 stop9h 01m

C$ 444

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/12

Showing 1-10 of 44 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, 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$ 437). 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 22 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 22 December 2024.

The most flights from CAON to SEA are scheduled on a Friday (6 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 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.

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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 22 December 2024.
Read reviews from past customers who have flown Alaska Airlines, Delta and United Airlines 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
9,537 reviews
Check prices

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.2

Overall

8.0

Reviews

1 / 10

How do online staff who book reservations get a passenger’s birthdate wrong

Alaska Airlines
8.0
Very good
9,537 reviews
Alaska Airlines
8.0
Very good
9,537 reviews
Check prices

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.2

Overall

8.0

Reviews

1 / 10

How do online staff who book reservations get a passenger’s birthdate wrong

Delta
8.0
Very good
8,594 reviews
Alaska Airlines
8.0
Very good
9,537 reviews
Check prices

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.2

Overall

8.0

Reviews

1 / 10

How do online staff who book reservations get a passenger’s birthdate wrong

Austrian Airlines
7.6
Good
785 reviews
Alaska Airlines
8.0
Very good
9,537 reviews
Check prices

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.2

Overall

8.0

Reviews

1 / 10

How do online staff who book reservations get a passenger’s birthdate wrong

United Airlines
7.4
Good
9,028 reviews
Alaska Airlines
8.0
Very good
9,537 reviews
Check prices

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.2

Overall

8.0

Reviews

1 / 10

How do online staff who book reservations get a passenger’s birthdate wrong

American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,537 reviews
Check prices

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.2

Overall

8.0

Reviews

1 / 10

How do online staff who book reservations get a passenger’s birthdate wrong

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?

    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.

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

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as C$ 226. Users have also found prices from C$ 227 and C$ 236 on Delta and Alaska Airlines, respectively.

  • 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 Montreal Pierre Elliott Trudeau Intl - Seattle/Tacoma Intl or Ottawa - Seattle/Tacoma Intl.

  • 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 Qatar Airways (100%), Hawaiian Airlines (89%) or Alaska Airlines (88%) 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?

    Looking at all options, your cheapest flight can be booked for C$ 224. While the most popular route (Toronto Pearson Intl - Seattle/Tacoma Intl) can be booked for C$ 348 on average our data indicates C$ 1,638 when flying from Region of Ontario to Seattle.

  • 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, 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$ 437). 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.

See more FAQs

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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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Pierre Elliott Trudeau Intl to Pasco flights
Pearson Intl to Pasco flights
Kelowna to Portland flights
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Pierre Elliott Trudeau Intl to Spokane flights
Fort St. John to Spokane flights

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 629,999 searches. Data last updated 22 December 2024.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 307AverageC$ 606FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 364AverageC$ 597FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapestC$ 376AverageC$ 638FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 405AverageC$ 691FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapestC$ 421AverageC$ 645FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 560AverageC$ 732FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Ontario to Seattle?

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Millions of users choose and trust Cheapflights to book the best flight deals from Ontario to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Ontario to Seattle with no change fees?

Need flexible booking options for your flight to Seattle from Ontario? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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Of course! You can now track prices for flights from Ontario to Seattle and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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