HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Montreal

$119+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
Nov 13 — Nov 201
Thu 11/13
Thu 11/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Montreal with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Montreal are usually found in September or August, booked 65 days in advance, depart on a Monday or Saturday and return on a Monday

Find 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 October 14, 2025.

This Trip.com deal was found by Cheapflights users on 10/14. 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.
Thu 12/43:10 pmSEA - YUL
1 stop12h 55mWestJet
Wed 12/107:30 pmYUL - SEA
1 stop21h 50mWestJet
Deal found 10/14$317
This Kiwi.com deal was found by Cheapflights users on 10/14. 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.
Fri 11/2811:55 amSEA - YUL
2 stops33h 48mWestJet
Fri 12/57:30 pmYUL - SEA
1 stop22h 10mWestJet
Deal found 10/14$334
This Kiwi.com deal was found by Cheapflights users on 10/14. 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 12/103:10 pmSEA - YUL
1 stop12h 55mMultiple Airlines
Fri 12/126:00 pmYUL - SEA
2 stops19h 22mMultiple Airlines
Deal found 10/14$359
This Kiwi.com deal was found by Cheapflights users on 10/14. 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.
Fri 11/2811:10 pmSEA - YUL
1 stop14h 17mMultiple Airlines
Fri 12/57:30 pmYUL - SEA
1 stop22h 10mMultiple Airlines
Deal found 10/14$361
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Tue 11/1111:10 pmSEA - YUL
1 stop14h 17mMultiple Airlines
Tue 11/186:45 amYUL - SEA
2 stops10h 35mMultiple Airlines
Deal found 10/13$365
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 11/125:45 pmSEA - YUL
1 stop19h 42mMultiple Airlines
Mon 11/176:00 pmYUL - SEA
1 stop23h 20mMultiple Airlines
Deal found 10/13$366
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Tue 11/1111:10 pmSEA - YUL
1 stop14h 17mMultiple Airlines
Mon 11/176:00 pmYUL - SEA
1 stop23h 20mMultiple Airlines
Deal found 10/13$367
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Sun 11/911:55 amSEA - YUL
2 stops25h 32mMultiple Airlines
Mon 11/176:00 pmYUL - SEA
1 stop23h 20mMultiple Airlines
Deal found 10/13$368
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 11/1011:10 pmSEA - YUL
1 stop14h 17mMultiple Airlines
Fri 11/146:45 amYUL - SEA
2 stops10h 35mMultiple Airlines
Deal found 10/13$372

Cheap 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 October 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$334
(Kiwi.com)

One-way from

$119
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$610

Good round-trip deal

$488 or less

Good one-way deal

$259 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 ($40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 14, 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

Mon 3/9

3:10 pm-3:13 pm

1 stop21h 03m

Montreal Pierre Elliott Trudeau Intl

Wed 3/18

7:30 pm-2:19 pm

1 stop21h 49m

$304

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 11/28

11:55 am-12:43 am

2 stops33h 48m

Montreal Pierre Elliott Trudeau Intl

Fri 12/5

7:30 pm-2:40 pm

1 stop22h 10m

$334

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 11/12

11:10 pm-4:27 pm

1 stop14h 17m

Montreal Pierre Elliott Trudeau Intl

Fri 11/14

6:45 am-2:20 pm

2 stops10h 35m

$377

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 11/21

3:10 pm-1:32 pm

1 stop19h 22m

Montreal Pierre Elliott Trudeau Intl

Sat 11/29

6:00 pm-10:22 am

2 stops19h 22m

$381

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 11/12

5:45 pm-4:27 pm

1 stop19h 42m

Montreal Pierre Elliott Trudeau Intl

Tue 11/18

6:45 am-7:05 pm

1 stop15h 20m

$387

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 4/5

3:10 pm-7:05 am

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Thu 4/9

6:45 am-2:19 pm

2 stops34h 34m

$391

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 11/28

11:55 am-12:43 am

2 stops33h 48m

Montreal Pierre Elliott Trudeau Intl

Fri 12/5

6:00 pm-10:22 am

2 stops19h 22m

$404

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 4/5

3:10 pm-7:05 am

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Tue 4/14

4:15 pm-2:19 pm

1 stop25h 04m

$406

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 4/6

3:10 pm-7:05 am

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Wed 4/15

4:15 pm-2:19 pm

1 stop25h 04m

$422

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 11/12

5:45 pm-4:27 pm

1 stop19h 42m

Montreal Pierre Elliott Trudeau Intl

Sun 11/16

6:45 am-5:06 pm

2 stops13h 21m

$424

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/14

Showing 1-10 of 23 results
1
2
3

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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice 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 October 10, 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 65 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 November is currently the most expensive (average of $317). 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 October 14, 2025.

It’s typically best to fly out from Seattle to Montreal in the afternoon. Doing so could potentially save you 68% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Seattle to Montreal?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Montreal. Price data was last updated on November 10, 2024.

Travelers seeking maximum savings on their Seattle to Montreal flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 14, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines 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
8.0
Very good
7,975 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
8.0
Very good
7,975 reviews
Delta
8.0
Very good
7,975 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,976 reviews
Delta
8.0
Very good
7,975 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,042 reviews
Delta
8.0
Very good
7,975 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
WestJet
7.2
Good
3,125 reviews
Delta
8.0
Very good
7,975 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Air Canada
7.1
Good
10,297 reviews
Delta
8.0
Very good
7,975 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 21h 03m. 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 United Airlines. Our recent data shows that you can find tickets from as low as $207 on this airline. Additional options worth looking into are Air Canada and WestJet, starting at $277 and $289 round-trip. United Airlines is priced at 64% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest flights from Seattle to Montreal?

    Looking for the cheapest flight from Seattle to Montreal? While on average our users pay $1,574, our data indicates the cheapest price to be $162. The most popular route (Seattle/Tacoma Intl - Montreal Pierre Elliott Trudeau Intl), is priced around $314.

  • 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 November is currently the most expensive (average of $317). 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 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 October 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$239Average$618FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$277Average$611FlexibilityNo cancel feeOn-time67%
WestJetCheapest$289Average$546FlexibilityNo cancel feeOn-time60%
DeltaCheapest$455Average$656FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$465Average$668FlexibilityNo cancel feeOn-time71%

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.