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$120+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
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 Seattle/Tacoma Intl to Montreal are usually found in September or August, booked 76 days in advance, depart on a Monday or Saturday 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 December 4, 2025.

This Air Canada deal was found by Cheapflights users on 12/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:10 amSEA - YUL
1 stop8h 12mAir Canada
Fri 1/309:00 amYUL - SEA
1 stop8h 31mAir Canada
Deal found 12/4$299
This Air Canada deal was found by Cheapflights users on 12/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/238:00 pmSEA - YUL
1 stop10h 08mAir Canada
Sat 1/102:25 pmYUL - SEA
2 stops10h 41mAir Canada
Deal found 12/4$406
This United Airlines deal was found by Cheapflights users on 12/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/165:00 amSEA - YUL
1 stop8h 58mUnited Airlines
Wed 12/175:25 pmYUL - SEA
1 stop19h 31mUnited Airlines
Deal found 12/2$442
This Kiwi.com deal was found by Cheapflights users on 12/4. 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 12/318:00 amSEA - YUL
1 stop13h 43mMultiple Airlines
Fri 1/307:30 pmYUL - SEA
2 stops17h 52mMultiple Airlines
Deal found 12/4$498
This Air Canada deal was found by Cheapflights users on 12/3. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/238:00 pmSEA - YUL
1 stop10h 08mAir Canada
Mon 1/59:00 pmYUL - SEA
1 stop15h 31mAir Canada
Deal found 12/3$508
This American Airlines deal was found by Cheapflights users on 12/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amSEA - YUL
1 stop13h 39mAmerican Airlines
Fri 1/307:00 amYUL - SEA
1 stop16h 45mAmerican Airlines
Deal found 12/4$518

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 December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$245
(Booking.com)

One-way from

$120
(Air Canada)

Popular in

December

Cheapest in

September

Average price

$776

Good round-trip deal

$517 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. 6% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip 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 December 4, 2025.
Use the filters below to find and compare flights from Seattle to Montreal that are best for you.

Fly from

Seattle

Fly to

Montreal

Route

Depart

Return

Price

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 1/22

5:50 am-7:14 pm

2 stops10h 24m

Montreal Pierre Elliott Trudeau Intl

Thu 1/29

9:00 am-2:31 pm

1 stop8h 31m

$253

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 5/14

7:05 am-12:40 am

2 stops14h 35m

Montreal Pierre Elliott Trudeau Intl

Wed 5/20

6:45 am-1:08 pm

1 stop9h 23m

$279

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 12/31

8:10 am-7:22 pm

1 stop8h 12m

Montreal Pierre Elliott Trudeau Intl

Fri 1/30

9:00 am-2:31 pm

1 stop8h 31m

$299

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 3/24

3:10 pm-7:05 am

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Tue 3/31

6:45 am-2:19 pm

2 stops34h 34m

$300

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 1/25

3:10 pm-7:05 am

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Mon 2/2

6:45 am-2:19 pm

2 stops34h 34m

$314

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 5/22

12:15 pm-7:36 am

1 stop16h 21m

Montreal Pierre Elliott Trudeau Intl

Wed 5/27

4:45 pm-7:41 pm

Nonstop5h 56m

$317

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 2/2

3:10 pm-7:05 am

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Tue 2/3

7:30 pm-2:19 pm

1 stop21h 49m

$330

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 2/8

3:10 pm-7:05 am

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Mon 2/16

4:15 pm-2:19 pm

1 stop25h 04m

$330

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 1/21

3:10 pm-7:05 am

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Mon 1/26

2:25 pm-10:06 pm

2 stops10h 41m

$342

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 2/8

10:05 am-9:00 pm

1 stop7h 55m

Montreal Pierre Elliott Trudeau Intl

Fri 2/13

9:00 am-2:31 pm

1 stop8h 31m

$382

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 22 results
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Montreal flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 November 28, 2025.

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 $205). Flying from Seattle to Montreal in December is currently the most expensive (average of $552). 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 SEA to YMQ?

Find hourly flight availability from Seattle to Montreal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 4, 2025.

It’s typically best to fly out from Seattle to Montreal in the afternoon. Doing so could potentially save you 63% on the flight price compared to flying in the morning, which is usually more expensive.

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 December 4, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and WestJet 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
8,011 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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
8,011 reviews
Delta
7.9
Good
8,011 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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
9,063 reviews
Delta
7.9
Good
8,011 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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
3,191 reviews
Delta
7.9
Good
8,011 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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
10,500 reviews
Delta
7.9
Good
8,011 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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 5 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 10h 24m. Fly via Air Canada or WestJet to get the fastest option. The distance from Seattle to Montreal is about 2276 mi. This flight may include one or multiple stops.

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

    Our cheapest airline available from Seattle to Montreal is United Airlines. Our recent data shows that you can find tickets from as low as $199 on this airline. Additional options worth looking into are Air Canada and WestJet, starting at $254 and $289 round-trip. United Airlines is priced at 66% 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 United Airlines, with whom users have recently found tickets for as low as $165. However, be on the lookout for offers from American Airlines and Air Canada, 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 $2,141, our data indicates the cheapest price to be $517. The most popular route (Seattle/Tacoma Intl - Montreal Pierre Elliott Trudeau Intl), is priced around $268.

  • 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 $205). Flying from Seattle to Montreal in December is currently the most expensive (average of $552). 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 5 airlines flying from Seattle to Montreal

Discover the top 5 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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$207Average$645FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$273Average$608FlexibilityNo cancel feeOn-time67%
WestJetCheapest$289Average$546FlexibilityNo cancel feeOn-time60%
DeltaCheapest$354Average$654FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$493Average$668FlexibilityNo cancel feeOn-time71%

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