$169 Cheap Flights from Montreal (YUL) to Seattle (SEA)

View $169 flight on Mon, Mar 9, 2026Opens in a new window

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

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Montreal to Seattle (YUL-SEA)

Prices were available within the past 7 days and start at $169 for one-way flights and $257 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

WestJet
Wed, Apr 8 - Sun, Apr 26
YUL
Montreal
SEA
Seattle
$257 Roundtrip, found 2 days ago
$257
Roundtrip
found 2 days ago
Select WestJet flight, departing Wed, Apr 8 from Montreal to Seattle, returning Sun, Apr 26, priced at $257 found 2 days ago
WestJet
Tue, Mar 3 - Mon, Mar 9
YUL
Montreal
SEA
Seattle
$283 Roundtrip, found 1 day ago
$283
Roundtrip
found 1 day ago
Select WestJet flight, departing Tue, Mar 3 from Montreal to Seattle, returning Mon, Mar 9, priced at $283 found 1 day ago
WestJet
Tue, Feb 3 - Tue, Feb 17
YUL
Montreal
SEA
Seattle
$283 Roundtrip, found 2 days ago
$283
Roundtrip
found 2 days ago
Select WestJet flight, departing Tue, Feb 3 from Montreal to Seattle, returning Tue, Feb 17, priced at $283 found 2 days ago
WestJet
Mon, Dec 1 - Mon, Dec 15
YUL
Montreal
SEA
Seattle
$317 Roundtrip, found 6 days ago
$317
Roundtrip
found 6 days ago
Select WestJet flight, departing Mon, Dec 1 from Montreal to Seattle, returning Mon, Dec 15, priced at $317 found 6 days ago
WestJet
Tue, Mar 3 - Wed, Mar 11
YUL
Montreal
SEA
Seattle
$343 Roundtrip, found 1 day ago
$343
Roundtrip
found 1 day ago
Select WestJet flight, departing Tue, Mar 3 from Montreal to Seattle, returning Wed, Mar 11, priced at $343 found 1 day ago
WestJet
Mon, Dec 1 - Wed, Dec 17
YUL
Montreal
SEA
Seattle
$357 Roundtrip, found 6 days ago
$357
Roundtrip
found 6 days ago
Select WestJet flight, departing Mon, Dec 1 from Montreal to Seattle, returning Wed, Dec 17, priced at $357 found 6 days ago
American Airlines
Tue, Jan 6 - Mon, Jan 12
YUL
Montreal
SEA
Seattle
$374 Roundtrip, found 6 days ago
$374
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Jan 6 from Montreal to Seattle, returning Mon, Jan 12, priced at $374 found 6 days ago
Delta
Tue, Jan 6 - Mon, Jan 12
YUL
Montreal
SEA
Seattle
$397 Roundtrip, found 6 days ago
$397
Roundtrip
found 6 days ago
Select Delta flight, departing Tue, Jan 6 from Montreal to Seattle, returning Mon, Jan 12, priced at $397 found 6 days ago
Air Canada
Fri, Mar 6 - Mon, Mar 9
YUL
Montreal
SEA
Seattle
$410 Roundtrip, found 1 day ago
$410
Roundtrip
found 1 day ago
Select Air Canada flight, departing Fri, Mar 6 from Montreal to Seattle, returning Mon, Mar 9, priced at $410 found 1 day ago
United
Wed, Jan 7 - Mon, Jan 12
YUL
Montreal
SEA
Seattle
$466 Roundtrip, found 6 days ago
$466
Roundtrip
found 6 days ago
Select United flight, departing Wed, Jan 7 from Montreal to Seattle, returning Mon, Jan 12, priced at $466 found 6 days ago

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

October is typically the cheapest month to fly

From $264 - $702 per traveler.

Alternative airports near Seattle

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

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $447
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $447

Frequently asked questions

How much does a flight from Pierre Elliott Trudeau Intl. Airport (YUL) to Seattle - Tacoma Intl. Airport (SEA) cost?
Lock in a cheap one-way flight from $169 or cheap return flight from $257 from Pierre Elliott Trudeau Intl. Airport (YUL) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Pierre Elliott Trudeau Intl. Airport (YUL) to Seattle - Tacoma Intl. Airport (SEA)?
April is the least expensive month to fly from YUL to SEA. Traveling during quieter months is often the key to finding better fares.
What is the cheapest airline that flies from Pierre Elliott Trudeau Intl. Airport (YUL) to Seattle - Tacoma Intl. Airport (SEA)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest YUL to SEA flight.
How many flights per day from Pierre Elliott Trudeau Intl. Airport (YUL) to Seattle - Tacoma Intl. Airport (SEA)?
Direct flights from Pierre Elliott Trudeau Intl. Airport (YUL) to Seattle - Tacoma Intl. Airport (SEA) aren't available daily, so you'll need 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 YUL to SEA?
Typically you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can change depending on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Pierre Elliott Trudeau Intl. Airport (YUL) to Seattle - Tacoma Intl. Airport (SEA)?
To land at Seattle - Tacoma Intl. Airport (SEA) on time, choose a flight that takes off from Pierre Elliott Trudeau Intl. Airport (YUL) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Pierre Elliott Trudeau Intl. Airport (YUL) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Last-minute bookings from YUL to SEA are usually more expensive. For the lowest rates, start searching for flights as soon as possible. That said, if you can play around with your travel dates, you may find a cheap fare right before your trip.
Is it cheaper to book a YUL to SEA flight and hotel package?
Compared with arranging flights and hotels separately, booking a YUL to SEA flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one place takes the hassle out of planning your trip. Simply pick your flights and choose from our extensive range of stays, then tailor your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Pierre Elliott Trudeau Intl. Airport (YUL) to Seattle - Tacoma Intl. Airport (SEA)?
In most cases, you can cancel or modify your YUL to SEA flight. However, there may be additional fees, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you'd like more details, visit our Customer Service portal.

Travel information

0
Origin airport
Pierre Elliott Trudeau Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, American Airlines, Delta, United, WestJet
Roundtrip price
$256
Distance
2277 mi

Book with confidence

Montreal to Seattle Flights

The cheapest times to fly from Montreal to Seattle

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 Montreal to Seattle are during the month of April. You can find some of the cheapest flights from Montreal to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Montreal to Seattle

Sunday is one of the best days to book for cheap flights from Montreal to Seattle: 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 Montreal to Seattle

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 Montreal to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $169 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 Montreal to Seattle 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 Montreal to Seattle 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.

 

Montreal to Seattle Flights

Explore a world of travel with Expedia

*Available to One Key members.