YUL - SEA

C$ 344 Find Cheap Flights from Montreal to Seattle – Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
C$ 605
Typical prices: C$ 590-C$ 881
Delta
Mon 8/1Tue 16/1
YUL - SEA • 1 stop
Cheapest one-way flights
C$ 344
Typical prices: C$ 345-C$ 559
Delta
Mon 23/4
YUL - SEA • 1 stop
Direct flights
Not available
There are currently no direct flights between Montreal Pierre Elliott Trudeau Intl Airport and Seattle. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
16 weeks
in advance
Our data shows that travellers who book at least 16 weeks in advance save around 54% compared to booking last minute.
Insights
Insights
When to travel
September
Cheapest • 20% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Washington, D.C. Dulles Intl (IAD)
Cheapest • Avg C$ 578 (round-trip)
Chicago O'Hare Intl (ORD)
Shortest trip • 8h 16m (one-way)
Insights
Insights
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We hope you enjoy your trip to Seattle!
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Expert advice
Flight Deals

Cheap Flights from Montreal to Seattle (YUL-SEA)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Montreal to Seattle

Tue, 2 Feb - Sat, 6 Feb
Delta Logo
12:43 p.m. - 11:25 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
13h 42m1 stop Atlanta Hartsfield-Jackson
Delta Logo
12:00 p.m. - 11:44 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 44m1 stop Minneapolis St Paul
C$ 605Delta
Wed, 27 Jan - Thu, 4 Feb
Delta Logo
7:05 a.m. - 4:46 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
12h 41m1 stop Minneapolis St Paul
Delta Logo
6:00 a.m. - 5:35 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 35m1 stop Atlanta Hartsfield-Jackson
C$ 605Delta
Thu, 3 Dec - Wed, 9 Dec
American Airlines Logo
12:08 p.m. - 8:31 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
11h 23m1 stop Chicago O'Hare Intl
American Airlines Logo
9:15 a.m. - 10:48 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
10h 33m1 stop Philadelphia
C$ 606American Airlines
Thu, 3 Dec - Wed, 9 Dec
American Airlines Logo
12:08 p.m. - 8:31 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
11h 23m1 stop Chicago O'Hare Intl
American Airlines Logo
9:15 a.m. - 10:48 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
10h 33m1 stop Philadelphia
C$ 607American Airlines
Thu, 10 Dec - Sat, 12 Dec
WestJet Logo
6:00 a.m. - 11:10 a.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
8h 10m1 stop Detroit Metropolitan Wayne County
WestJet Logo
1:36 p.m. - 11:33 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
6h 57m1 stop Detroit Metropolitan Wayne County
C$ 628WestJet
Thu, 3 Dec - Wed, 9 Dec
Air Canada Logo
8:45 a.m. - 2:37 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
8h 52m1 stop Vancouver Intl
Air Canada Logo
8:09 a.m. - 7:48 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 39m1 stop Washington, D.C. Dulles Intl
C$ 656Air Canada
Thu, 3 Dec - Wed, 9 Dec
Air Canada Logo
1:05 p.m. - 9:57 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
11h 52m2 stops Edmonton Vancouver Intl
Air Canada Logo
8:09 a.m. - 7:48 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 39m1 stop Washington, D.C. Dulles Intl
C$ 656Air Canada
Thu, 3 Dec - Wed, 9 Dec
WestJet Logo
6:45 a.m. - 1:40 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
33h 55m2 stops Toronto Pearson Intl Calgary
WestJet Logo
2:30 p.m. - 4:50 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
23h 20m1 stop Calgary
C$ 659WestJet
Sun, 22 Nov - Fri, 27 Nov
United Airlines Logo
2:13 p.m. - 12:59 a.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
13h 46m2 stops Washington, D.C. Dulles Intl San Francisco
United Airlines Logo
6:00 a.m. - 9:42 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
12h 42m2 stops Los Angeles Newark
C$ 679United Airlines
Thu, 25 Feb - Wed, 3 Mar
United Airlines Logo
4:45 p.m. - 10:59 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
9h 14m1 stop Chicago O'Hare Intl
United Airlines Logo
8:15 a.m. - 7:48 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 33m1 stop Washington, D.C. Dulles Intl
C$ 764United Airlines
Booking Insights

Price, demand, and travel trends for Montreal Pierre Elliott Trudeau Intl Airport to Seattle flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

Round-trip flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle typically range from C$ 590 to C$ 881. The lowest price found in the past 5 days was C$ 605, on Delta.

What's the cheapest day of the week to fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

Based on deals KAYAK users found in the last 12 months, Thursday is the cheapest day of the week to fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle. It's 4% cheaper than the average day, while Wednesday is the most expensive, with prices 2% higher.

What is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

•September is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle at C$ 577 round-trip.
•June (C$ 809) and December (C$ 747) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 40% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle the cheapest?

Flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle are cheapest 16 weeks before departure. Booking in this window typically costs about 54% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Expert advice

Expert advice for your flight from Montreal to Seattle

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada and United Airlines

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Mark Stachiew

Mark Stachiew

Expert on YUL

Mark Stachiew has been exploring the world and writing about it for more than 30 years. His travel stories have appeared in numerous newspapers, magazines and online publications in Canada, the United States and beyond.

Read more
Harriet Baskas

Harriet Baskas

Expert on SEA

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more

Key details for Montreal Pierre Elliott Trudeau Intl Airport to Seattle flights

Low season

February

Cheapest flight

C$ 344
Beat the crowds with an average 67% drop in traveller numbers.
The most popular month to fly with an average 100% increase in traveller numbers.
One-way flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle

When to book flights from Montreal to Seattle

Are your dates flexible? Find out the best times to travel from Montreal to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Montreal Pierre Elliott Trudeau Intl Airport to Seattle flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • Which cabin classes can I book on flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

    Three cabin classes are available on flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle:

    • Economy Class
    • Business Class
    • First Class

  • How long does a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle take?

    A direct flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle takes 00m, covering 5,895 km.

  • Do I need a passport to fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Montreal Pierre Elliott Trudeau Intl Airport to Seattle flight?

    Round-trip flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle range from C$ 590 to C$ 881, with an average of C$ 720 over the past 12 months. Anything below C$ 590 counts as a good deal.

  • How expensive are last-minute Montreal Pierre Elliott Trudeau Intl Airport to Seattle flights?

    Last-minute fares on this route (booked within two weeks of departure) run 48% above the C$ 720 route average. Book 16 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

    On this route, layover flights are cheaper than direct options on average. Layover fares average C$ 578 round-trip via Washington, D.C. Dulles Intl (IAD), compared to C$ 723 for direct.

  • What is the standard checked bag allowance on flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

    There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 34–C$ 34 for the first checked bag in economy. Premium fares and elite status bookings typically include a free checked bag.

  • Have flight prices from Montreal Pierre Elliott Trudeau Intl Airport to Seattle changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about C$ 605 to C$ 4,550. That means the highest observed fare was about 8x higher than the lowest one.

  • Which airlines offer Wi-Fi on Montreal Pierre Elliott Trudeau Intl Airport to Seattle flights?

    Air Canada is the only airline on the Montreal Pierre Elliott Trudeau Intl Airport to Seattle route offering in-flight Wi-Fi. Pricing depends on fare class.

  • How are flight prices from Montreal Pierre Elliott Trudeau Intl Airport to Seattle looking right now?

    One-way fares from Montreal Pierre Elliott Trudeau Intl Airport to Seattle are currently lower than usual. Average one-way flight prices are about C$ 369, which is 15% below the typical average for this route.

  • What car rental options are available at Seattle/Tacoma Intl Airport (SEA)?

    Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates averaging C$ 84 for economy cars. Top options include:

    • Europcar
    • Fox
    • Thrifty
    • Budget
    • Dollar

  • Which airports can I use when flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

    Flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle usually depart from Montreal Pierre Elliott Trudeau Intl (YUL) and arrive at Seattle/Tacoma Intl (SEA).

  • Which airports do connecting flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle pass through?

    One-stop flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle most commonly connect through:

    • Toronto Pearson Intl (YYZ) – 32% of one-stop connections
    • Vancouver Intl (YVR) – 30% of one-stop connections
    • Calgary (YYC) – 24% of one-stop connections
    • Chicago O'Hare Intl (ORD) – 6% of one-stop connections

  • Can I save money by using flexible dates for flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

    Yes. Flexible dates can save you up to 7% on flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle. Thursday is the cheapest departure day at C$ 695 round-trip on average, while Wednesday is the most expensive at C$ 741, a difference of C$ 46.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport when travelling from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

    Flying via Chicago O'Hare Intl (ORD) gives the shortest average 1-stop total travel time at 8h 16m, compared with 8h 49m via Vancouver Intl (YVR) and 8h 59m via Toronto Pearson Intl (YYZ).

  • What is the time difference between Montreal Pierre Elliott Trudeau Intl Airport and Seattle?

    Seattle is 3 hours behind Montreal Pierre Elliott Trudeau Intl Airport (Pacific Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • Which popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are Lumen Field, T-Mobile Park, and Climate Pledge Arena. These are among the most viewed places in Seattle on KAYAK.

  • Which airlines offer extra legroom and free seat selection on Montreal Pierre Elliott Trudeau Intl Airport to Seattle flights?

    Among airlines operating Montreal Pierre Elliott Trudeau Intl Airport to Seattle flights:

    • Air Canada: offers extra legroom; offers free seat selection
    • United Airlines: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Montreal Pierre Elliott Trudeau Intl Airport to Seattle flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Air Canada: a carry-on bag and a checked bag in Economy Class
    • United Airlines: a cabin bag in Economy Class class

    Baggage allowance can vary by ticket type, cabin class, route, and airline, so always check the fare details before booking.

Your guide to booking Montreal Pierre Elliott Trudeau Intl Airport to Seattle flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Thursday departure and avoid flying on Wednesday. On this route, Thursday flights average C$ 695, about C$ 46 less than Wednesday fares (6% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 16 weeks before you fly. On this route, that window historically saves about 54% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Montreal Pierre Elliott Trudeau Intl Airport to Seattle trip for September. Fares historically average C$ 577 round-trip in that month – typically C$ 232 less than the most expensive month, which is June (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Washington, D.C. Dulles Intl Airport (IAD) can be cheaper than flying direct. The cheapest layover option averages C$ 578 round-trip on this route – about C$ 145 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Seattle/Tacoma Intl Airport.

    • Coast Gateway Hotel
    • Seattle Airport Marriott
    • Fairfield by Marriott Inn & Suites Seattle Sea-Tac Airport

More options for your flight from Montreal to Seattle

Complete your trip to Seattle with a hotel stay or car rental

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