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Cheap flights from Ontario to Seattle from C$ 198

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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
9 Nov — 16 Nov1
1 adult

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 4 November 2024.

Thu 28/117:55 a.m.YYZ - SEA
1 stop9h 26mWestJet
Wed 4/123:15 p.m.SEA - YYZ
2 stops11h 45mWestJet
Deal found 3/11C$ 357
Thu 28/114:20 p.m.YYZ - SEA
Nonstop5h 35mAlaska Airlines
Fri 6/127:22 a.m.SEA - YYZ
Nonstop4h 33mAlaska Airlines
Deal found 3/11C$ 370
Tue 3/127:15 p.m.YYZ - SEA
Nonstop5h 25mAir Canada
Tue 10/126:05 a.m.SEA - YYZ
Nonstop4h 45mAir Canada
Deal found 3/11C$ 371
Wed 27/118:00 p.m.YYZ - SEA
1 stop25h 20mMultiple Airlines
Wed 11/124:00 p.m.SEA - YYZ
1 stop11h 46mMultiple Airlines
Deal found 3/11C$ 382
Wed 27/116:15 a.m.YYZ - SEA
1 stop14h 00mDelta
Fri 6/1212:55 a.m.SEA - YYZ
1 stop9h 46mDelta
Deal found 3/11C$ 386
Thu 28/118:25 a.m.YTZ - SEA
3 stops16h 42mAir Canada
Wed 4/125:45 a.m.SEA - YTZ
2 stops9h 58mAir Canada
Deal found 3/11C$ 390
Thu 12/1211:55 a.m.YYZ - SEA
1 stop12h 24mAmerican Airlines
Tue 31/1210:56 p.m.SEA - YYZ
1 stop15h 33mAmerican Airlines
Deal found 3/11C$ 403
Tue 26/116:15 a.m.YYZ - SEA
1 stop10h 28mUnited Airlines
Tue 10/125:10 p.m.SEA - YYZ
1 stop10h 26mUnited Airlines
Deal found 3/11C$ 407
Sun 24/117:00 p.m.YOW - SEA
1 stop22h 21mMultiple Airlines
Tue 3/128:00 a.m.SEA - YOW
1 stop13h 46mMultiple Airlines
Deal found 3/11C$ 496
Mon 2/125:35 p.m.YTZ - SEA
3 stops23h 46mMultiple Airlines
Mon 9/129:21 p.m.SEA - YTZ
2 stops19h 44mMultiple Airlines
Deal found 3/11C$ 543
Tue 17/126:45 a.m.YUL - SEA
2 stops14h 36mMultiple Airlines
Wed 8/12:16 p.m.SEA - YUL
1 stop23h 19mMultiple Airlines
Deal found 3/11C$ 570
Mon 2/128:10 p.m.YOW - SEA
2 stops21h 11mWestJet
Mon 9/123:15 p.m.SEA - YOW
2 stops11h 18mWestJet
Deal found 4/11C$ 587

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 503,521 searches. Data last updated 4 November 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 8/1

6:30 a.m.-9:34 a.m.

2 stops30h 04m

C$ 215

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 27/11

7:40 a.m.-2:21 p.m.

1 stop9h 41m

C$ 218

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 30/1

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

Nonstop5h 23m

C$ 219

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 8/1

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

1 stop12h 05m

C$ 227

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 30/1

8:45 a.m.-2:30 p.m.

1 stop8h 45m

C$ 233

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 30/1

11:00 a.m.-9:20 p.m.

3 stops13h 20m

C$ 241

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 11/3

7:50 a.m.-9:46 p.m.

1 stop16h 56m

C$ 385

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 3/12

9:20 a.m.-2:53 p.m.

2 stops32h 33m

C$ 225

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Tue 3/12

1:10 p.m.-2:53 p.m.

3 stops28h 43m

C$ 232

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 5/2

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

2 stops22h 51m

C$ 273

Flights are sorted by cheapest first

Deals found on 3/11

Showing 1-10 of 51 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$ 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 4 November 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 4 November 2024.

The most flights from CAON to SEA are scheduled on a Monday (4 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.

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 4 November 2024.
Read reviews from past customers who have flown United Airlines, WestJet 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
9,423 reviews
Check prices

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Food

7.2

Overall

8.0

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
9,423 reviews
Alaska Airlines
8.0
Very good
9,423 reviews
Check prices

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Food

7.2

Overall

8.0

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
8,829 reviews
Alaska Airlines
8.0
Very good
9,423 reviews
Check prices

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Food

7.2

Overall

8.0

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
9,226 reviews
Alaska Airlines
8.0
Very good
9,423 reviews
Check prices

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Food

7.2

Overall

8.0

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
2,803 reviews
Alaska Airlines
8.0
Very good
9,423 reviews
Check prices

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Food

7.2

Overall

8.0

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
9,423 reviews
Check prices

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Food

7.2

Overall

8.0

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?

    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 WestJet. According to our data, you can fly for as low as C$ 209. Users have also found prices from C$ 219 and C$ 233 on Alaska Airlines and Air Canada, 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 Hawaiian Airlines (97%), Alaska Airlines (92%) or Brussels Airlines (78%) 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$ 225. While the most popular route (Toronto Pearson Intl - Seattle/Tacoma Intl) can be booked for C$ 370 on average our data indicates C$ 1,367 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$ 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.

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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 503,521 searches. Data last updated 4 November 2024.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 298AverageC$ 607FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 368AverageC$ 642FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Alaska AirlinesCheapestC$ 368AverageC$ 588FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
United AirlinesCheapestC$ 404AverageC$ 688FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapestC$ 413AverageC$ 631FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 544AverageC$ 711FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

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

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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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