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$143+ Cheap flights from Seattle (SEA) to Montreal (YMQ)

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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
May 9 — May 161
Sat 5/9
Sat 5/16
1 adult, Economy
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Find cheap flights from Seattle to Montreal with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Montreal are usually found in March or September, booked 76 days in advance, depart on a Monday or Wednesday and return on a Monday

Cheap flight deals from Seattle to Montreal

Cheapest flights from Seattle to Montreal
Explore the most affordable flight options available from Seattle to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 9, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Mon 5/117:35 pm
SEA
-
YUL
1 stop8h 30m
WestJet
Thu 6/46:45 am
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 4/8$337
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 6/107:35 pm
SEA
-
YUL
1 stop8h 30m
WestJet
Sat 6/136:45 am
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 4/8$343
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Mon 5/117:35 pm
SEA
-
YUL
1 stop8h 30m
WestJet
Mon 6/18:00 pm
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 4/8$351
This Vliegwinkel deal was found by Cheapflights users on 4/8. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/277:35 pm
SEA
-
YUL
1 stop8h 30m
WestJet
Mon 5/48:00 pm
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 4/8$352
This Kiwi.com deal was found by Cheapflights users on 4/6. 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 5/167:35 pm
SEA
-
YUL
1 stop8h 30m
WestJet
Sat 5/238:00 pm
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 4/6$353
This Trip.com deal was found by Cheapflights users on 4/7. 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 4/277:35 pm
SEA
-
YUL
1 stop8h 30m
WestJet
Tue 5/128:00 pm
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 4/7$357
This Trip.com deal was found by Cheapflights users on 4/6. 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 5/57:35 pm
SEA
-
YUL
1 stop8h 30m
WestJet
Tue 5/128:00 pm
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 4/6$358
This Trip.com deal was found by Cheapflights users on 4/6. 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 5/47:35 pm
SEA
-
YUL
1 stop8h 30m
WestJet
Sat 5/97:15 am
YUL
-
SEA
1 stop29h 25m
WestJet
Deal found 4/6$361
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 5/167:35 pm
SEA
-
YUL
1 stop8h 30m
WestJet
Fri 6/56:45 am
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 4/8$362
This Kiwi.com deal was found by Cheapflights users on 4/5. 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.
Mon 5/117:35 pm
SEA
-
YUL
1 stop8h 30m
WestJet
Wed 5/138:00 pm
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 4/5$363
This Trip.com deal was found by Cheapflights users on 4/7. 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.
Sat 5/167:35 pm
SEA
-
YUL
1 stop8h 30m
WestJet
Tue 5/196:45 am
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 4/7$366

Find flight deals from Seattle to Montreal

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Montreal (YMQ). 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 April 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$337
(Kiwi.com)

One-way from

$143
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$615

Good round-trip deal

$3,219 or less

Good one-way deal

$279 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Montreal (YMQ) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Montreal (YMQ) flights.
Search Deals
From Seattle/Tacoma Intl to Montreal (YMQ)
Search Deals
One-way flight from Seattle/Tacoma Intl to Montreal (YMQ)
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($61 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Montreal (YMQ).
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Montreal (YMQ).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Montreal 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 April 9, 2026.
Use the filters below to find and compare flights from Seattle to Montreal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 5/1

7:35 pm-4:30 pm

1 stop17h 55m

Montreal Pierre Elliott Trudeau Intl

Sun 5/10

6:45 am-6:45 pm

2 stops39h 00m

$425

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 8/24

7:35 pm-7:05 am

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Mon 8/31

6:45 am-6:45 pm

2 stops15h 00m

$453

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 5/1

7:35 pm-12:25 am

2 stops25h 50m

Montreal Pierre Elliott Trudeau Intl

Sun 5/3

6:45 am-6:45 pm

2 stops15h 00m

$469

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 4/29

7:35 pm-6:20 pm

2 stops19h 45m

Montreal Pierre Elliott Trudeau Intl

Wed 5/6

7:20 pm-6:45 pm

2 stops26h 25m

$469

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 9/4

7:35 pm-7:05 am

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Mon 9/14

7:20 pm-9:40 am

2 stops17h 20m

$474

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 7/30

10:30 am-11:45 pm

1 stop10h 15m

Montreal Pierre Elliott Trudeau Intl

Tue 8/18

8:00 pm-6:45 pm

1 stop25h 45m

$480

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 5/2

7:35 pm-6:50 pm

2 stops20h 15m

Montreal Pierre Elliott Trudeau Intl

Wed 5/6

6:45 am-6:45 pm

2 stops15h 00m

$489

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 8/3

7:35 pm-7:05 am

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Sat 8/8

7:20 pm-9:40 am

2 stops17h 20m

$497

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 6/24

7:35 pm-7:05 am

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Sat 7/4

8:00 pm-9:40 am

1 stop16h 40m

$525

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 5/8

5:30 am-4:15 pm

1 stop7h 45m

Montreal Pierre Elliott Trudeau Intl

Mon 5/11

12:40 pm-9:40 pm

2 stops12h 00m

$558

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/8

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from Seattle to Montreal

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 Seattle to Montreal in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 Seattle-Montreal flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Montreal flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Montreal flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Montreal flights, Cheapflights users trust FlightHub the most. FlightHub 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 Seattle-Montreal 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 Seattle to Montreal

Have a flexible travel schedule? Discover the best time to fly to Montreal from Seattle 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 Seattle to Montreal

How far ahead should I book a flight from Seattle to Montreal?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Montreal. Price data was last updated on April 3, 2026.

The price you pay for your flight from Seattle to Montreal may vary depending on when you book. For the best chance of a lower fare, look to book 76 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Montreal?

Currently, May is the cheapest month in which you can book a flight from Seattle to Montreal (average of $193). Flying from Seattle to Montreal in December is currently the most expensive (average of $564). 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.

How much does it cost to fly round-trip from Seattle to Montreal?

Reviews of airlines servicing Montreal

Get insights into the airlines that provide service to Montreal. 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 Montreal. Reviews last updated April 9, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andWestJet from Seattle to Montreal by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,392 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,392 reviews
Delta
7.9
Good
8,392 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,555 reviews
Delta
7.9
Good
8,392 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
WestJet
7.2
Good
3,317 reviews
Delta
7.9
Good
8,392 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air Canada
7.1
Good
10,907 reviews
Delta
7.9
Good
8,392 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Montreal. 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 from for flights from Seattle to Montreal?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Montreal. On average, Seattle/Tacoma Intl has 0 outbound flights to Montreal per day from 4 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • How long is the flight from Seattle to Montreal?

    There are many flights that can get you from Seattle to Montreal in 17h 55m. Fly via WestJet to get the fastest option. The distance from Seattle to Montreal is about 2276 mi.

  • What are the cheapest airlines flying from Seattle to Montreal round-trip?

    Our cheapest airline available from Seattle to Montreal is WestJet. Our recent data shows that you can find tickets from as low as $151 on this airline. Additional options worth looking into are United Airlines and Air Canada, starting at $197 and $274 round-trip. WestJet is priced at 73% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Seattle to Montreal one-way?

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $134. However, be on the lookout for offers from United Airlines and Delta, as they are both options that can get you from Seattle to Montreal for a low price.

  • What are the cheapest flights from Seattle to Montreal?

    Looking for the cheapest flight from Seattle to Montreal? While on average our users pay $2,036, our data indicates the cheapest price to be $257. The most popular route (Seattle/Tacoma Intl - Montreal Pierre Elliott Trudeau Intl), is priced around $387.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Montreal 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 Seattle to Montreal?

    Currently, May is the cheapest month in which you can book a flight from Seattle to Montreal (average of $193). Flying from Seattle to Montreal in December is currently the most expensive (average of $564). 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

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Top 4 airlines flying from Seattle to Montreal

Discover the top 4 airlines that operate flights from Seattle to Montreal. 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 April 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$151Average$474FlexibilityNo cancel feeOn-time60%
United AirlinesCheapest$197Average$532FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$274Average$674FlexibilityNo cancel feeOn-time67%
DeltaCheapest$310Average$619FlexibilityNo cancel feeOn-timeN/A

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