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$133+ 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
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 August 18, 2025.

Round-trip from

$296
(Kiwi.com)

One-way from

$133
(Kiwi.com)

Popular in

February

Cheapest in

September

Average price

$604

Good round-trip deal

$555 or less

Good one-way deal

$200 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 ($60 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/18. 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 9/162:05 pmSEA - YUL
1 stop7h 36mWestJet
Tue 9/237:00 amYUL - SEA
1 stop8h 59mWestJet
Deal found 8/18$296
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/171:50 pmSEA - YUL
1 stop7h 51mWestJet
Tue 9/237:00 amYUL - SEA
1 stop8h 59mWestJet
Deal found 8/16$309
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/171:50 pmSEA - YUL
2 stops21h 19mMultiple Airlines
Tue 9/237:00 amYUL - SEA
1 stop8h 59mMultiple Airlines
Deal found 8/16$316
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/158:40 amSEA - YUL
1 stop26h 30mMultiple Airlines
Wed 10/157:00 amYUL - SEA
1 stop8h 59mMultiple Airlines
Deal found 8/16$319
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 10/101:50 pmSEA - YUL
1 stop7h 51mWestJet
Mon 10/207:00 amYUL - SEA
1 stop8h 59mWestJet
Deal found 8/16$320
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/41:50 pmSEA - YUL
1 stop7h 51mWestJet
Wed 9/107:00 amYUL - SEA
1 stop8h 59mWestJet
Deal found 8/16$321
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/61:50 pmSEA - YUL
1 stop7h 51mWestJet
Tue 9/237:00 amYUL - SEA
1 stop8h 59mWestJet
Deal found 8/16$326
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 10/41:50 pmSEA - YUL
1 stop7h 51mWestJet
Tue 10/77:00 amYUL - SEA
1 stop8h 59mWestJet
Deal found 8/17$327
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/171:50 pmSEA - YUL
1 stop7h 51mWestJet
Mon 9/227:00 amYUL - SEA
1 stop8h 59mWestJet
Deal found 8/16$329
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/177:55 amSEA - YUL
1 stop27h 14mMultiple Airlines
Wed 9/246:45 amYUL - SEA
2 stops35h 46mMultiple Airlines
Deal found 8/16$331

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 August 18, 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

Tue 9/16

2:05 pm-12:41 am

1 stop7h 36m

Montreal Pierre Elliott Trudeau Intl

Tue 9/23

7:00 am-12:59 pm

1 stop8h 59m

$296

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 9/17

1:50 pm-12:41 am

1 stop7h 51m

Montreal Pierre Elliott Trudeau Intl

Tue 9/23

7:00 am-12:59 pm

1 stop8h 59m

$309

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 9/17

1:50 pm-2:09 pm

2 stops21h 19m

Montreal Pierre Elliott Trudeau Intl

Tue 9/23

7:00 am-12:59 pm

1 stop8h 59m

$316

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 10/10

1:50 pm-12:41 am

1 stop7h 51m

Montreal Pierre Elliott Trudeau Intl

Mon 10/20

7:00 am-12:59 pm

1 stop8h 59m

$319

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 9/4

1:50 pm-12:41 am

1 stop7h 51m

Montreal Pierre Elliott Trudeau Intl

Sat 9/13

7:00 am-12:59 pm

1 stop8h 59m

$321

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 9/4

1:50 pm-12:41 am

1 stop7h 51m

Montreal Pierre Elliott Trudeau Intl

Wed 9/10

7:00 am-12:59 pm

1 stop8h 59m

$321

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 9/6

1:50 pm-12:41 am

1 stop7h 51m

Montreal Pierre Elliott Trudeau Intl

Tue 9/9

7:00 am-12:59 pm

1 stop8h 59m

$326

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 9/10

1:50 pm-12:41 am

1 stop7h 51m

Montreal Pierre Elliott Trudeau Intl

Tue 9/23

7:00 am-12:59 pm

1 stop8h 59m

$326

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 9/16

2:05 pm-12:41 am

1 stop7h 36m

$133

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 9/9

7:05 am-2:10 pm

1 stop28h 05m

$135

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/15

Showing 1-10 of 17 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 8, 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 August 18, 2025.

It’s typically best to fly out from Seattle to Montreal in the afternoon. Doing so could potentially save you 60% 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. Wednesday 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 August 18, 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 August 18, 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
7,981 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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
8,925 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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
7,981 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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
3,023 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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
9,992 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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 7h 36m. 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 $1,585, our data indicates the cheapest price to be $165. The most popular route (Seattle/Tacoma Intl - Montreal Pierre Elliott Trudeau Intl), is priced around $331.

  • 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

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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$228Average$615FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$272Average$608FlexibilityNo 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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