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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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Montreal are usually found in May or January, booked 32 days in advance, depart on a Thursday or Tuesday and return on a Wednesday

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 April 15, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$285
(Kiwi.com)

One-way from

$143
(Kiwi.com)

Popular in

February

Cheapest in

May

Average price

$598

Good round-trip deal

$567 or less

Good one-way deal

$322 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Montreal (YMQ) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Montreal (YMQ) flights.
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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. 10% potential increase in price ($69 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/15. 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 6/32:05 pmSEA - YUL
1 stop7h 38mWestJet
Tue 6/107:00 amYUL - SEA
1 stop8h 58mWestJet
Deal found 4/15$285
This Flightnetwork deal was found by Cheapflights users on 4/15. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/301:50 pmSEA - YUL
1 stop7h 53mMultiple Airlines
Fri 6/65:45 pmYUL - SEA
Nonstop5h 52mMultiple Airlines
Deal found 4/15$318
This Flightnetwork deal was found by Cheapflights users on 4/15. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/307:20 amSEA - YUL
Nonstop5h 10mAir Canada
Fri 6/65:45 pmYUL - SEA
Nonstop5h 52mAir Canada
Deal found 4/15$379
This American Airlines deal was found by Cheapflights users on 4/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/910:59 pmSEA - YUL
1 stop10h 22mAmerican Airlines
Sat 5/103:44 pmYUL - SEA
1 stop12h 01mAmerican Airlines
Deal found 4/14$427
This United Airlines deal was found by Cheapflights users on 4/15. 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.
Wed 5/217:20 amSEA - YUL
Nonstop5h 10mUnited Airlines
Tue 5/274:45 pmYUL - SEA
Nonstop5h 52mUnited Airlines
Deal found 4/15$448
This Delta deal was found by Cheapflights users on 4/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1311:40 pmSEA - YUL
1 stop11h 01mDelta
Fri 6/207:00 amYUL - SEA
1 stop9h 44mDelta
Deal found 4/14$461

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 15, 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 6/3

2:05 pm-12:43 am

1 stop7h 38m

Montreal Pierre Elliott Trudeau Intl

Tue 6/10

7:00 am-12:58 pm

1 stop8h 58m

$285

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 5/30

1:50 pm-12:43 am

1 stop7h 53m

Montreal Pierre Elliott Trudeau Intl

Fri 6/6

5:45 pm-8:37 pm

Nonstop5h 52m

$318

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 5/30

7:20 am-3:30 pm

Nonstop5h 10m

Montreal Pierre Elliott Trudeau Intl

Fri 6/6

5:45 pm-8:37 pm

Nonstop5h 52m

$379

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 5/9

10:59 pm-12:21 pm

1 stop10h 22m

Montreal Pierre Elliott Trudeau Intl

Sat 5/10

3:44 pm-12:45 am

1 stop12h 01m

$427

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 5/21

7:20 am-3:30 pm

Nonstop5h 10m

Montreal Pierre Elliott Trudeau Intl

Tue 5/27

4:45 pm-7:37 pm

Nonstop5h 52m

$448

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 6/13

11:40 pm-1:41 pm

1 stop11h 01m

Montreal Pierre Elliott Trudeau Intl

Fri 6/20

7:00 am-1:44 pm

1 stop9h 44m

$461

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 5/29

10:49 am-12:37 am

2 stops34h 48m

$143

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 6/30

7:35 pm-12:43 am

1 stop26h 08m

$155

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 5/30

7:20 am-3:30 pm

Nonstop5h 10m

$192

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 5/4

10:55 pm-11:58 am

1 stop10h 03m

$202

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 12 results
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*2 stars
eDreamsPrice 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 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 April 11, 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 32 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 April 15, 2025.

It’s typically best to fly out from Seattle to Montreal in the afternoon. Doing so could potentially save you 67% 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. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Montreal by month

Plan your trip to Montreal by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Montreal ranges from 2.5 - 4.4 inches per month. August is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Montreal when rainfall is around 2.5 in.

Temperature in Montreal by month

Plan your trip to Montreal by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Montreal, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 15.8 F).

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 15, 2025.
To help decide which airline to fly from Seattle to Montreal, see what other customers have to say about Delta, United Airlines and American Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,918 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,918 reviews
Delta
8.0
Very good
7,918 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,658 reviews
Delta
8.0
Very good
7,918 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,918 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
2,805 reviews
Delta
8.0
Very good
7,918 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.0
Good
9,127 reviews
Delta
8.0
Very good
7,918 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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 $285 on this airline. Additional options worth looking into are Air Canada and American Airlines, starting at $379 and $427 round-trip. WestJet is priced at 53% 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 $155. However, be on the lookout for offers from Air Canada 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 $1,165, our data indicates the cheapest price to be $131. The most popular route (Seattle/Tacoma Intl - Montreal Pierre Elliott Trudeau Intl), is priced around $348.

  • 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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$240Average$641FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$264Average$596FlexibilityNo cancel feeOn-time67%
WestJetCheapest$312Average$459FlexibilityNo cancel feeOn-time60%
DeltaCheapest$455Average$656FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$483Average$668FlexibilityNo cancel feeOn-time71%

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