$112 Cheap Flights from Seattle (SEA) to Montreal (YUL)

View $112 flight on Sun, Apr 26, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Montreal–Trudeau Intl. Airport (YUL)

Cheap Flights from Seattle to Montreal (SEA-YUL)

Prices were available within the past 7 days and start at $112 for one-way flights and $330 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

WestJet
Sun, Feb 8 - Tue, Feb 17
SEA
Seattle
YUL
Montreal
$330 Roundtrip, found 13 hours ago
$330
Roundtrip
found 13 hours ago
Select WestJet flight, departing Sun, Feb 8 from Seattle to Montreal, returning Tue, Feb 17, priced at $330 found 13 hours ago
WestJet
Thu, Oct 23 - Mon, Nov 10
SEA
Seattle
YUL
Montreal
$345 Roundtrip, found 5 days ago
$345
Roundtrip
found 5 days ago
Select WestJet flight, departing Thu, Oct 23 from Seattle to Montreal, returning Mon, Nov 10, priced at $345 found 5 days ago
Air Canada
Wed, Nov 19 - Thu, Nov 20
SEA
Seattle
YUL
Montreal
$346 Roundtrip, found 23 hours ago
$346
Roundtrip
found 23 hours ago
Select Air Canada flight, departing Wed, Nov 19 from Seattle to Montreal, returning Thu, Nov 20, priced at $346 found 23 hours ago
WestJet
Sun, Apr 5 - Tue, Apr 28
SEA
Seattle
YUL
Montreal
$353 Roundtrip, found 4 days ago
$353
Roundtrip
found 4 days ago
Select WestJet flight, departing Sun, Apr 5 from Seattle to Montreal, returning Tue, Apr 28, priced at $353 found 4 days ago
Air Canada
Thu, Nov 27 - Fri, Nov 28
SEA
Seattle
YUL
Montreal
$357 Roundtrip, found 2 hours ago
$357
Roundtrip
found 2 hours ago
Select Air Canada flight, departing Thu, Nov 27 from Seattle to Montreal, returning Fri, Nov 28, priced at $357 found 2 hours ago
Air Canada
Wed, Dec 3 - Thu, Dec 4
SEA
Seattle
YUL
Montreal
$365 Roundtrip, found 4 days ago
$365
Roundtrip
found 4 days ago
Select Air Canada flight, departing Wed, Dec 3 from Seattle to Montreal, returning Thu, Dec 4, priced at $365 found 4 days ago
WestJet
Fri, Jan 9 - Tue, Jan 13
SEA
Seattle
YUL
Montreal
$372 Roundtrip, found 23 hours ago
$372
Roundtrip
found 23 hours ago
Select WestJet flight, departing Fri, Jan 9 from Seattle to Montreal, returning Tue, Jan 13, priced at $372 found 23 hours ago
WestJet
Tue, Dec 2 - Thu, Dec 4
SEA
Seattle
YUL
Montreal
$375 Roundtrip, found 22 hours ago
$375
Roundtrip
found 22 hours ago
Select WestJet flight, departing Tue, Dec 2 from Seattle to Montreal, returning Thu, Dec 4, priced at $375 found 22 hours ago
Delta
Sat, Nov 15 - Tue, Nov 18
SEA
Seattle
YUL
Montreal
$465 Roundtrip, found 5 hours ago
$465
Roundtrip
found 5 hours ago
Select Delta flight, departing Sat, Nov 15 from Seattle to Montreal, returning Tue, Nov 18, priced at $465 found 5 hours ago
United
Sun, Feb 8 - Sat, Feb 14
SEA
Seattle
YUL
Montreal
$496 Roundtrip, found 13 hours ago
$496
Roundtrip
found 13 hours ago
Select United flight, departing Sun, Feb 8 from Seattle to Montreal, returning Sat, Feb 14, priced at $496 found 13 hours ago

Find the cheapest month to fly from Seattle (SEA) to Montreal (YUL)

October is typically the cheapest month to fly

From $299 - $769 per traveler.

Alternative airports near Montreal

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Pierre Elliott Trudeau Intl. YUL. Cheapest and Closest option available. Average driving time to city center is 17 minutes. Flights from $505
YUL
Pierre Elliott Trudeau Intl.
CheapestClosest
Average driving time to city center17 min
Flights from $505
Flights from Seattle (SEA) to Montreal (YUL)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Pierre Elliott Trudeau Intl.
Airlines serving
Air Canada, American Airlines, Delta, United, WestJet
Roundtrip price
$329
Distance
2277 mi

Seattle to Montreal Flights

The cheapest times to fly from Seattle to Montreal

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Montreal are during the month of February. You can find some of the cheapest flights from Seattle to Montreal with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Montreal

Sunday is one of the best days to book for cheap flights from Seattle to Montreal: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Montreal

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Montreal in 2025. You can also book with separate airlines for your outbound and return journeys, from $112 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Montreal flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Montreal airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Pierre Elliott Trudeau Intl. Airport (YUL) cost?
Secure a cheap one-way flight from $112 or cheap return flight from $330 from Seattle - Tacoma Intl. Airport (SEA) to Pierre Elliott Trudeau Intl. Airport (YUL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Pierre Elliott Trudeau Intl. Airport (YUL)?
February is the least expensive month to fly from SEA to YUL. Traveling during quieter months is often the key to scoring lower fares.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Pierre Elliott Trudeau Intl. Airport (YUL)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find the carrier with the cheapest SEA to YUL flight.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Pierre Elliott Trudeau Intl. Airport (YUL)?
Nonstop flights from Seattle - Tacoma Intl. Airport (SEA) to Pierre Elliott Trudeau Intl. Airport (YUL) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SEA to YUL?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can vary depending on a number of factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Pierre Elliott Trudeau Intl. Airport (YUL)?
Opt for a flight from Seattle - Tacoma Intl. Airport (SEA) to Pierre Elliott Trudeau Intl. Airport (YUL) that leaves before 3 PM to reduce the likelihood of delays. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Pierre Elliott Trudeau Intl. Airport (YUL) last-minute?
Waiting until just before your departure to book your flight from SEA to YUL generally means paying more. While you may come across some last-minute discounts, there's no guarantee. Keep your travel plans flexible to maximize your chances of scoring a bargain.
Is it cheaper to book a SEA to YUL flight and hotel package?
Booking a SEA to YUL flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of hotels and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Pierre Elliott Trudeau Intl. Airport (YUL)?
Typically, you can cancel or reschedule your SEA to YUL flight. However, there may be additional fees, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you want more information, head to our Customer Service portal.

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*Available to One Key members.