Find flights
Deals
Airlines
FAQs

Cheap flights from Ontario to Seattle from C$ 213

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 27/1. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
25 Nov — 2 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 20 November 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 20 November 2024.

Mon 9/124:20 p.m.YYZ - SEA
Nonstop5h 19mAlaska Airlines
Mon 30/127:26 a.m.SEA - YYZ
Nonstop4h 41mAlaska Airlines
Deal found 18/11C$ 363
Mon 16/127:15 p.m.YYZ - SEA
Nonstop5h 25mAir Canada
Wed 25/123:05 p.m.SEA - YYZ
1 stop6h 52mAir Canada
Deal found 19/11C$ 378
Mon 16/125:04 p.m.YYZ - SEA
1 stop8h 21mDelta
Wed 25/128:30 a.m.SEA - YYZ
1 stop11h 38mDelta
Deal found 19/11C$ 379
Wed 27/116:30 a.m.YYZ - SEA
1 stop10h 51mWestJet
Wed 4/123:15 p.m.SEA - YYZ
1 stop18h 24mWestJet
Deal found 20/11C$ 417
Wed 4/128:00 p.m.YYZ - SEA
1 stop15h 57mMultiple Airlines
Wed 11/124:00 p.m.SEA - YYZ
1 stop11h 46mMultiple Airlines
Deal found 19/11C$ 426
Thu 5/125:35 p.m.YUL - SEA
1 stop18h 22mMultiple Airlines
Mon 9/122:34 p.m.SEA - YUL
2 stops23h 01mMultiple Airlines
Deal found 19/11C$ 559
Tue 24/126:55 p.m.YYZ - SEA
Nonstop5h 25mUnited Airlines
Sat 1/25:00 a.m.SEA - YYZ
2 stops15h 20mUnited Airlines
Deal found 19/11C$ 575
Tue 10/126:00 a.m.YUL - SEA
2 stops13h 34mDelta
Tue 17/129:40 a.m.SEA - YUL
2 stops11h 15mDelta
Deal found 19/11C$ 643
Tue 17/126:30 a.m.YKF - SEA
1 stop10h 51mWestJet
Wed 25/123:15 p.m.SEA - YKF
1 stop7h 01mWestJet
Deal found 19/11C$ 645
Thu 12/122:00 p.m.YTZ - SEA
3 stops30h 34mMultiple Airlines
Mon 16/129:21 p.m.SEA - YTZ
2 stops21h 04mMultiple Airlines
Deal found 19/11C$ 657
Tue 26/114:45 p.m.YUL - SEA
1 stop24h 36mWestJet
Tue 3/123:15 p.m.SEA - YUL
1 stop21h 21mWestJet
Deal found 19/11C$ 679
Mon 9/126:05 p.m.YHM - SEA
1 stop23h 16mWestJet
Wed 11/123:15 p.m.SEA - YHM
1 stop22h 58mWestJet
Deal found 20/11C$ 687

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 645,034 searches. Data last updated 20 November 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 9/12

4:20 p.m.-6:39 p.m.

Nonstop5h 19m

Seattle/Tacoma Intl

Mon 30/12

7:26 a.m.-3:07 p.m.

Nonstop4h 41m

C$ 363

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 20/1

6:40 p.m.-11:16 a.m.

1 stop19h 36m

Seattle/Tacoma Intl

Mon 27/1

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

Nonstop4h 45m

C$ 365

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 28/1

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

1 stop9h 26m

Seattle/Tacoma Intl

Sun 2/2

3:15 p.m.-6:17 a.m.

1 stop12h 02m

C$ 368

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 9/1

6:00 a.m.-10:45 a.m.

1 stop7h 45m

Seattle/Tacoma Intl

Sun 12/1

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

1 stop7h 15m

C$ 374

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 19/2

7:00 p.m.-9:50 a.m.

1 stop17h 50m

Seattle/Tacoma Intl

Tue 25/2

7:05 p.m.-6:09 a.m.

1 stop8h 04m

C$ 377

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 9/1

6:00 a.m.-12:41 p.m.

1 stop9h 41m

Seattle/Tacoma Intl

Thu 16/1

5:22 a.m.-4:15 p.m.

1 stop7h 53m

C$ 382

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 9/1

3:30 p.m.-11:09 p.m.

2 stops10h 39m

Seattle/Tacoma Intl

Tue 14/1

5:25 p.m.-6:36 a.m.

1 stop10h 11m

C$ 386

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 25/2

6:14 a.m.-7:05 p.m.

1 stop15h 51m

Seattle/Tacoma Intl

Tue 25/2

12:43 a.m.-4:15 p.m.

1 stop12h 32m

C$ 398

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Thu 9/1

8:25 p.m.-2:30 p.m.

2 stops21h 05m

Seattle/Tacoma Intl

Thu 16/1

5:45 a.m.-9:50 p.m.

2 stops13h 05m

C$ 414

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 8/1

5:45 a.m.-2:30 p.m.

2 stops11h 45m

Seattle/Tacoma Intl

Wed 29/1

7:05 p.m.-9:15 a.m.

2 stops11h 10m

C$ 484

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/11

Showing 1-10 of 51 results
1
2
3
...
6

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$ 271). 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 20 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.

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 20 November 2024.
Read reviews from past customers who have flown WestJet, Air Canada and American 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.
8.0
Very good
9,461 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.2

Entertainment

7.1

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.

8.0
Very good
9,461 reviews
8.0
Very good
9,461 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.2

Entertainment

7.1

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.

8.0
Very good
8,756 reviews
8.0
Very good
9,461 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.2

Entertainment

7.1

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.

7.4
Good
9,171 reviews
8.0
Very good
9,461 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.2

Entertainment

7.1

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.

7.3
Good
2,811 reviews
8.0
Very good
9,461 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.2

Entertainment

7.1

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.

7.2
Good
10,000 reviews
8.0
Very good
9,461 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.2

Entertainment

7.1

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$ 213. Users have also found prices from C$ 224 and C$ 231 on Delta and United Airlines, respectively.

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

  • 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?

    Looking at all options, your cheapest flight can be booked for C$ 233. While the most popular route (Toronto Pearson Intl - Seattle/Tacoma Intl) can be booked for C$ 347 on average our data indicates C$ 1,392 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$ 271). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 645,034 searches. Data last updated 20 November 2024.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 299AverageC$ 608FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 363AverageC$ 583FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapestC$ 366AverageC$ 626FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 396AverageC$ 674FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapestC$ 410AverageC$ 631FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 546AverageC$ 713FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Seattle from Ontario today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ontario to Seattle?

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.

Can Cheapflights notify me if prices for flights from Ontario to Seattle become cheaper?

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.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.