HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Montreal

$147+ 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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 May or September, booked 48 days in advance, depart on a Thursday or Monday 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 June 12, 2025.

Round-trip from

$352
(FlightHub)

One-way from

$147
(Kiwi.com)

Popular in

February

Cheapest in

May

Average price

$562

Good round-trip deal

$522 or less

Good one-way deal

$194 or less
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. 10% potential increase in price ($74 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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

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 June 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/241:50 pmSEA - YUL
1 stop7h 51mWestJet
Mon 9/297:00 amYUL - SEA
1 stop8h 59mWestJet
Deal found 6/11$352
This Flightnetwork deal was found by Cheapflights users on 6/10. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/82:05 pmSEA - YUL
1 stop7h 38mMultiple Airlines
Tue 7/225:45 pmYUL - SEA
Nonstop5h 56mMultiple Airlines
Deal found 6/10$370
This Flightnetwork deal was found by Cheapflights users on 6/10. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/87:20 amSEA - YUL
Nonstop5h 09mAir Canada
Tue 7/225:45 pmYUL - SEA
Nonstop5h 56mAir Canada
Deal found 6/10$397
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/131:22 amSEA - YUL
1 stop10h 28mAmerican Airlines
Sat 6/145:29 pmYUL - SEA
1 stop19h 35mAmerican Airlines
Deal found 6/11$436
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/1411:24 pmSEA - YUL
1 stop10h 45mUnited Airlines
Sat 6/216:30 pmYUL - SEA
1 stop9h 29mUnited Airlines
Deal found 6/11$482
This Kissandfly.com deal was found by Cheapflights users on 6/11. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1311:32 pmSEA - YUL
1 stop12h 18mBritish Airways
Thu 6/1912:30 pmYUL - SEA
1 stop14h 47mBritish Airways
Deal found 6/11$522
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/48:25 amSEA - YUL
1 stop11h 59mDelta
Mon 12/86:00 amYUL - SEA
1 stop11h 24mDelta
Deal found 6/11$538

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 June 12, 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 9/24

1:50 pm-12:41 am

1 stop7h 51m

Montreal Pierre Elliott Trudeau Intl

Mon 9/29

7:00 am-12:59 pm

1 stop8h 59m

$352

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 7/8

2:05 pm-12:43 am

1 stop7h 38m

Montreal Pierre Elliott Trudeau Intl

Tue 7/22

5:45 pm-8:41 pm

Nonstop5h 56m

$370

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 7/8

7:20 am-3:29 pm

Nonstop5h 09m

Montreal Pierre Elliott Trudeau Intl

Tue 7/22

5:45 pm-8:41 pm

Nonstop5h 56m

$397

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 6/30

12:20 am-10:40 am

1 stop7h 20m

Montreal Pierre Elliott Trudeau Intl

Wed 7/9

6:30 pm-12:59 am

1 stop9h 29m

$488

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 8/18

12:45 am-4:41 pm

1 stop12h 56m

Montreal Pierre Elliott Trudeau Intl

Tue 8/26

7:29 am-10:00 pm

1 stop17h 31m

$489

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 12/4

8:25 am-11:24 pm

1 stop11h 59m

Montreal Pierre Elliott Trudeau Intl

Mon 12/8

6:00 am-2:24 pm

1 stop11h 24m

$538

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 10/3

1:50 pm-12:41 am

1 stop7h 51m

$147

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 7/21

2:05 pm-2:12 pm

2 stops21h 07m

$165

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 10/6

3:13 pm-11:35 am

1 stop17h 22m

$170

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 7/23

6:15 pm-12:59 pm

1 stop15h 44m

$193

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 13 results
1
2

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 June 9, 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 48 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 June 12, 2025.

It’s typically best to fly out from Seattle to Montreal in the afternoon. Doing so could potentially save you 62% 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.

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 June 12, 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
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

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
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

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
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

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
2,868 reviews
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

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
9,531 reviews
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

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 1 outbound flight 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 $352 on this airline. Additional options worth looking into are Air Canada and United Airlines, starting at $397 and $488 round-trip. WestJet is priced at 42% 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 $147. However, be on the lookout for offers from American Airlines and Sun Country Air, 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 $1,862, our data indicates the cheapest price to be $126. The most popular route (Seattle/Tacoma Intl - Montreal Pierre Elliott Trudeau Intl), is priced around $354.

  • 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$228Average$615FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$269Average$609FlexibilityNo cancel feeOn-time67%
WestJetCheapest$283Average$473FlexibilityNo cancel feeOn-time60%
DeltaCheapest$455Average$656FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$465Average$670FlexibilityNo 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.