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$153+ Cheap flights from Pearson Intl (YYZ) 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 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Toronto Pearson Intl to Seattle/Tacoma Intl are usually found in February or January, booked 86 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Find flight deals from Pearson Intl to Seattle

Cheapest flights from Pearson Intl to Seattle
Explore the most affordable flight options available from Pearson Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

This FlightHub deal was found by Cheapflights users on 10/28. 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.
Tue 11/257:45 amYYZ - SEA
1 stop9h 35mWestJet
Wed 12/33:15 pmSEA - YYZ
2 stops11h 43mWestJet
Deal found 10/28$211
This FlightHub deal was found by Cheapflights users on 10/28. 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.
Wed 12/37:45 amYYZ - SEA
1 stop9h 50mWestJet
Fri 12/123:10 pmSEA - YYZ
2 stops11h 48mWestJet
Deal found 10/28$218
This Trip.com deal was found by Cheapflights users on 10/27. 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.
Tue 12/27:45 amYYZ - SEA
1 stop9h 35mWestJet
Thu 12/43:10 pmSEA - YYZ
2 stops11h 48mWestJet
Deal found 10/27$221
This FlightHub deal was found by Cheapflights users on 10/26. 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.
Mon 11/247:45 amYYZ - SEA
1 stop9h 35mWestJet
Fri 12/53:10 pmSEA - YYZ
2 stops11h 48mWestJet
Deal found 10/26$224
This FlightHub deal was found by Cheapflights users on 10/25. 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.
Sun 11/237:45 amYYZ - SEA
1 stop9h 35mWestJet
Sun 11/303:10 pmSEA - YYZ
2 stops11h 48mWestJet
Deal found 10/25$226
This Trip.com deal was found by Cheapflights users on 10/28. 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.
Mon 12/87:45 amYYZ - SEA
1 stop9h 35mWestJet
Fri 12/123:10 pmSEA - YYZ
2 stops11h 48mWestJet
Deal found 10/28$229
This Trip.com deal was found by Cheapflights users on 10/28. 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.
Tue 11/257:45 amYYZ - SEA
1 stop9h 35mMultiple Airlines
Tue 12/27:55 amSEA - YYZ
Nonstop4h 40mMultiple Airlines
Deal found 10/28$230
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/224:00 pmYYZ - SEA
1 stop25h 20mWestJet
Sat 11/293:20 pmSEA - YYZ
2 stops11h 38mWestJet
Deal found 10/28$233
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Thu 11/208:45 pmYYZ - SEA
1 stop16h 37mWestJet
Tue 11/253:10 pmSEA - YYZ
2 stops12h 48mWestJet
Deal found 10/26$234

Cheap flight deals from Pearson Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Pearson Intl (YYZ) 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 October 28, 2025.

Most accurate provider

OneTravel
3 stars

Most trusted provider

OneTravel
3 stars

Round-trip from

$211
(FlightHub)

One-way from

$154
(Alaska Airlines)

Popular in

July

Cheapest in

February

Average price

$309

Good round-trip deal

$299 or less

Good one-way deal

$198 or less
Provider with most accurate pricing for Toronto Pearson Intl-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Toronto Pearson Intl-Seattle/Tacoma Intl flights.
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From Toronto Pearson Intl to Seattle/Tacoma Intl
Search Deals
One-way flight from Toronto Pearson Intl to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($67 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Toronto Pearson Intl to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Toronto Pearson Intl to Seattle/Tacoma Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Pearson Intl 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 2,558,603 searches. Data last updated October 28, 2025.
Use the filters below to find and compare flights from Toronto Pearson Intl Airport to Seattle that are best for you.

Fly from

Pearson Intl

Fly to

Seattle

Route

Depart

Return

Price

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 12/2

4:45 pm-7:18 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Thu 12/4

7:55 am-3:35 pm

Nonstop4h 40m

$265

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 12/17

7:40 am-5:47 pm

1 stop13h 07m

Seattle/Tacoma Intl

Tue 1/6

7:10 am-10:56 pm

1 stop12h 46m

$266

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 12/7

6:10 am-12:40 pm

1 stop9h 30m

Seattle/Tacoma Intl

Wed 12/10

11:40 am-11:59 pm

1 stop9h 19m

$271

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 11/18

3:38 pm-10:23 pm

1 stop9h 45m

Seattle/Tacoma Intl

Sun 11/23

11:10 pm-11:24 am

1 stop9h 14m

$271

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 11/24

4:45 pm-7:17 pm

Nonstop5h 32m

Seattle/Tacoma Intl

Fri 12/5

7:55 am-3:35 pm

Nonstop4h 40m

$272

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 11/18

5:55 pm-12:59 am

1 stop10h 04m

Seattle/Tacoma Intl

Sun 11/23

11:51 pm-11:48 am

1 stop8h 57m

$279

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 11/26

5:55 pm-12:59 am

1 stop10h 04m

Seattle/Tacoma Intl

Wed 12/3

8:10 am-3:53 pm

Nonstop4h 43m

$282

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 12/18

4:45 pm-7:11 pm

Nonstop5h 26m

Seattle/Tacoma Intl

Thu 1/1

8:00 am-3:35 pm

Nonstop4h 35m

$292

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 11/16

6:30 am-4:15 pm

1 stop12h 45m

Seattle/Tacoma Intl

Sat 11/22

12:10 am-1:43 pm

1 stop10h 33m

$297

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 11/20

10:00 am-6:10 pm

2 stops11h 10m

Seattle/Tacoma Intl

Sat 11/22

12:10 am-1:43 pm

1 stop10h 33m

$300

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 21 results
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Compare providers for flights from Pearson Intl to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Pearson Intl to Seattle in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
SmartFaresPrice Accuracy1 starTrust Score*1 star
OneTravelPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Toronto Pearson Intl Airport-Seattle flights, users find the pricing of OneTravel to be most consistent on Cheapflights vs. OneTravel Users can find the same prices on Toronto Pearson Intl Airport-Seattle flight deals on Cheapflights vs. OneTravel >95% of the time. Price accuracy is based on data collected from Toronto Pearson Intl Airport-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Toronto Pearson Intl Airport-Seattle flights, Cheapflights users trust OneTravel the most. OneTravel has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Toronto Pearson Intl Airport-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Pearson Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Pearson Intl 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.

Cheapflights Insights

Everything you need to know about your flight from Toronto Pearson Intl Airport to Seattle

How far ahead should I book a flight from Toronto Pearson Intl Airport to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Pearson Intl to Seattle. Price data was last updated on October 24, 2025.

To ensure you get the cheapest price possible for a flight from Toronto Pearson Intl Airport to Seattle, you should look to book at least 86 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Toronto Pearson Intl Airport to Seattle?

Currently, March is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of $172). Flying from Toronto Pearson Intl Airport to Seattle in June is currently the most expensive (average of $249). 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 YYZ to SEA?

Find hourly flight availability from Pearson Intl 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 October 28, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 50% on flights from Toronto Pearson Intl Airport to Seattle by exploring options for tickets in the evening.

What is the cheapest day to fly from Toronto Pearson Intl Airport to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Pearson Intl to Seattle. Price data was last updated on October 26, 2025.

Travelers seeking maximum savings on their Toronto Pearson Intl Airport to Seattle flight should consider departing on Saturday evenings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Toronto Pearson Intl Airport to Seattle?

The best insider tips for Toronto Pearson Intl Airport to Seattle flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Toronto Pearson Intl Airport to Seattle trip
Airlines
Alaska Airlines

Alaska Airlines offers flat-fee Wi-Fi, great for business travelers on longer flights.


Alaska's Premium Class offers extra legroom and free cocktails, enhancing comfort on medium-haul flights.

Read more about Alaska Airlinesby Robert Schrader
Air Canada

Air Canada offers high-speed Wi-Fi on most flights, book in advance for best rates.


Economy Latitude includes priority check-in and two checked bags, ideal for business travelers.

Read more about Air Canadaby Jessica Macdonald
Airports
YYZ

Toronto Pearson offers unlimited free Wi-Fi throughout the airport, making it easy to stay connected on multiple devices without hassle.

Read more about YYZby Kaitlyn McInnis
SEA

Use the Link light rail from SEA to downtown Seattle. It's inexpensive, runs every 10 minutes, and takes less than 40 minutes.

Read more about SEAby Brandon Schultz
Our travel experts
Robert Schrader

Robert Schrader

Expert on Alaska Airlines

Robert Schrader

Robert Schrader

One of the web's original travel bloggers, Robert launched his first site Leave Your Daily Hell in 2009. Since then, he's expanded into destination niche sites (one each for Japan, Thailand and Taiwan), in addition to having written for the inflight magazines of Singapore Airlines and Korean Air. Overall, he's visited nearly 100 countries, and flies business as often as possible.

Read more
Jessica Macdonald

Jessica Macdonald

Expert on Air Canada

Jessica Macdonald

Jessica Macdonald

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Read more
Kaitlyn McInnis

Kaitlyn McInnis

Expert on YYZ

Kaitlyn McInnis

Kaitlyn McInnis

Kaitlyn is a guidebook author and travel writer splitting her time between Atlantic Canada and Istanbul, Türkiye. She has visited over fifty countries and all seven continents, so she is very familiar with many hotels, airports and airlines around the globe. But her favorite type of vacation is sunbathing by the sea with a good book in hand.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

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 October 28, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and United Airlines from Toronto Pearson Intl Airport to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,199 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
11,199 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
7.9
Good
7,995 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
United Airlines
7.4
Good
8,996 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
WestJet
7.2
Good
3,148 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Air Canada
7.1
Good
10,370 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

Related info for your journey

Find useful and relevant information for your journey from Pearson Intl 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 Toronto Pearson Intl?

    For a flight from Toronto Pearson Intl to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 3 inbound flights from Toronto Pearson Intl per day. 6 airlines have flights to Seattle/Tacoma Intl from Toronto Pearson Intl on a regular basis.

  • How long is the flight from Toronto Pearson Intl Airport to Seattle?

    Departing from Toronto Pearson Intl Airport to Seattle will take you 5h 33m. The distance from Toronto Pearson Intl Airport to Seattle is about 2054 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Toronto Pearson Intl Airport to Seattle round-trip?

    According to our current data, WestJet ($192), Alaska Airlines ($225), and Air Canada ($238) offers the cheapest pricing from Toronto Pearson Intl Airport to Seattle. You may be able to fly from Toronto Pearson Intl Airport to Seattle for 46% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Toronto Pearson Intl Airport to Seattle one-way?

    $154 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Air Canada and WestJet, with prices starting from $154 and $155, respectively.

  • What are the most reliable airlines from Toronto Pearson Intl Airport to Seattle?

    Before booking your flight to Seattle from Toronto Pearson Intl Airport, check out the most reliable airlines to get you to your destination on time: Alaska Airlines (95%), Air Tahiti Nui (94%), Hawaiian Airlines( 90%).

  • What are the cheapest flights from Toronto Pearson Intl Airport to Seattle?

    Looking for the cheapest flight from Toronto Pearson Intl Airport to Seattle? While on average our users pay $624, our data indicates the cheapest price to be $153. The most popular route (Toronto Pearson Intl - Seattle/Tacoma Intl), is priced around $224.

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

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

  • How can I find direct flights from Pearson Intl to Seattle?

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

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

    Yes. Cheapflights offers flight deals from Pearson Intl 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 Toronto Pearson Intl Airport to Seattle?

    Currently, March is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of $172). Flying from Toronto Pearson Intl Airport to Seattle in June is currently the most expensive (average of $249). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Olympia
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Kirkland
Lacey
Kent
Federal Way
Cle Elum
Marysville
Puyallup
Chehalis
Fife
Issaquah

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Alternative routes for Pearson Intl to Seattle

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

Discover the top 6 airlines that operate flights from Pearson Intl 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 2,558,603 searches. Data last updated October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$192Average$279FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$225Average$416FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$238Average$433FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$243Average$456FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$277Average$277FlexibilityNo cancel feeOn-time71%
DeltaCheapest$289Average$364FlexibilityNo cancel feeOn-timeN/A

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