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$110+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Montreal are usually found in September or June, booked 65 days in advance, depart on a Monday or Saturday and return on a Monday

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 September 11, 2025.

Round-trip from

$317
(Mytrip)

One-way from

$110
(Kiwi.com)

Popular in

February

Cheapest in

September

Average price

$501

Good round-trip deal

$488 or less

Good one-way deal

$219 or less
From Seattle/Tacoma Intl to Montreal (YMQ)
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One-way flight from Seattle/Tacoma Intl to Montreal (YMQ)
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Highest demand for flights based on searches. 9% potential increase in price ($62 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Montreal (YMQ).
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Montreal (YMQ).
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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 September 11, 2025.

This oojo deal was found by Cheapflights users on 9/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/72:05 pmSEA - YUL
2 stops31h 22mWestJet
Sat 10/115:30 pmYUL - SEA
2 stops22h 05mWestJet
Deal found 9/10$356
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 11/273:10 pmSEA - YUL
1 stop19h 22mMultiple Airlines
Sun 11/304:15 pmYUL - SEA
1 stop25h 05mMultiple Airlines
Deal found 9/10$365
This Booking.com deal was found by Cheapflights users on 9/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/31:15 pmSEA - YUL
2 stops32h 26mWestJet
Mon 10/66:45 amYUL - SEA
2 stops16h 44mWestJet
Deal found 9/10$366
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 9/307:05 amSEA - YUL
1 stop28h 05mMultiple Airlines
Sat 10/187:00 amYUL - SEA
1 stop10h 55mMultiple Airlines
Deal found 9/9$367
This oojo deal was found by Cheapflights users on 9/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/168:40 amSEA - YUL
2 stops12h 47mWestJet
Thu 10/236:45 amYUL - SEA
2 stops15h 36mWestJet
Deal found 9/10$369
This oojo deal was found by Cheapflights users on 9/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/258:40 amSEA - YUL
2 stops12h 47mWestJet
Sat 11/16:45 amYUL - SEA
2 stops35h 35mWestJet
Deal found 9/10$370
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/81:50 pmSEA - YUL
1 stop23h 37mWestJet
Sat 10/115:30 pmYUL - SEA
2 stops22h 05mWestJet
Deal found 9/10$371
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/11:50 pmSEA - YUL
1 stop7h 51mMultiple Airlines
Fri 10/36:00 pmYUL - SEA
2 stops20h 38mMultiple Airlines
Deal found 9/10$374
This Air Canada deal was found by Cheapflights users on 9/9. 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 9/237:15 amSEA - YUL
Nonstop5h 13mAir Canada
Thu 10/24:45 pmYUL - SEA
Nonstop5h 46mAir Canada
Deal found 9/9$375
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 11/253:10 pmSEA - YUL
1 stop21h 02mWestJet
Tue 12/27:30 pmYUL - SEA
1 stop21h 50mWestJet
Deal found 9/11$379
This Air Canada deal was found by Cheapflights users on 9/9. 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 9/237:15 amSEA - YUL
Nonstop5h 13mAir Canada
Sat 10/47:30 amYUL - SEA
1 stop9h 46mAir Canada
Deal found 9/9$380

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 September 11, 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

Wed 11/26

3:10 pm-12:43 am

2 stops30h 33m

Montreal Pierre Elliott Trudeau Intl

Tue 12/2

6:45 am-2:20 pm

2 stops34h 35m

$371

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 11/27

3:10 pm-1:32 pm

1 stop19h 22m

Montreal Pierre Elliott Trudeau Intl

Wed 12/3

7:30 pm-2:20 pm

1 stop21h 50m

$379

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 11/25

3:10 pm-3:12 pm

1 stop21h 02m

Montreal Pierre Elliott Trudeau Intl

Wed 12/3

7:30 pm-2:20 pm

1 stop21h 50m

$379

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 11/27

3:10 pm-1:32 pm

1 stop19h 22m

Montreal Pierre Elliott Trudeau Intl

Tue 12/2

7:30 pm-2:20 pm

1 stop21h 50m

$379

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 11/25

3:10 pm-3:12 pm

1 stop21h 02m

Montreal Pierre Elliott Trudeau Intl

Mon 12/1

7:30 pm-2:20 pm

1 stop21h 50m

$379

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 11/25

3:10 pm-3:12 pm

1 stop21h 02m

Montreal Pierre Elliott Trudeau Intl

Tue 12/2

7:30 pm-2:20 pm

1 stop21h 50m

$379

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 11/25

3:10 pm-1:32 pm

1 stop19h 22m

Montreal Pierre Elliott Trudeau Intl

Wed 12/3

6:45 am-1:41 pm

2 stops33h 56m

$381

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 11/26

3:10 pm-1:32 pm

1 stop19h 22m

Montreal Pierre Elliott Trudeau Intl

Wed 12/3

6:45 am-1:41 pm

2 stops33h 56m

$382

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 9/23

11:54 pm-10:40 am

1 stop7h 46m

Montreal Pierre Elliott Trudeau Intl

Fri 10/3

9:45 am-3:45 pm

1 stop9h 00m

$390

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 10/7

2:05 pm-12:41 am

1 stop7h 36m

$110

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 18 results
1
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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 August 29, 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, January is the cheapest month in which you can book a flight from Seattle to Montreal (average of $270). Flying from Seattle to Montreal in July is currently the most expensive (average of $409). 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 September 11, 2025.

It’s typically best to fly out from Seattle to Montreal in the afternoon. Doing so could potentially save you 59% 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 Sunday afternoons 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.

Weekly flight availability from Seattle to Montreal

Explore weekly flight availability from Seattle to Montreal. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 11, 2025.

The most flights from SEA to YMQ are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

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 September 11, 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
7,960 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
WestJet
7.2
Good
3,091 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
10,000 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 2 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 30h 33m. 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 $228 on this airline. Additional options worth looking into are Air Canada and WestJet, starting at $272 and $289 round-trip. United Airlines is priced at 61% 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 $1,633, our data indicates the cheapest price to be $127. The most popular route (Seattle/Tacoma Intl - Montreal Pierre Elliott Trudeau Intl), is priced around $319.

  • 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, January is the cheapest month in which you can book a flight from Seattle to Montreal (average of $270). Flying from Seattle to Montreal in July is currently the most expensive (average of $409). 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$228Average$650FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$272Average$607FlexibilityNo cancel feeOn-time67%
WestJetCheapest$289Average$546FlexibilityNo cancel feeOn-time60%
DeltaCheapest$455Average$656FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$465Average$668FlexibilityNo cancel feeOn-time71%

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