YUL - SEA

C$ 245 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$ 400
Typical prices: C$ 580-C$ 899
WestJet
Sat 13/10Sat 20/10
YUL - SEA • 2 stops
Cheapest one-way flights
C$ 247
Typical prices: C$ 344-C$ 636
WestJet
Sun 14/10
YUL - SEA • 2 stops
Direct flights
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
in advance
Our data shows that travellers who book at least 16 weeks in advance save around 57% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 20% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg C$ 461 (round-trip)
Shortest trip • 8h 15m (one-way)
Insights
Insights
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We hope you enjoy your trip to Seattle!
Flight Deals
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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, 13 Oct - Tue, 20 Oct
WestJet Logo
6:45 a.m. - 6:45 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
15h 00m2 stops Toronto Pearson Intl Calgary
WestJet Logo
7:35 p.m. - 7:05 a.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 30m1 stop Calgary
C$ 400WestJet
Tue, 13 Oct - Thu, 22 Oct
WestJet Logo
6:45 a.m. - 6:45 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
15h 00m2 stops Toronto Pearson Intl Calgary
WestJet Logo
7:35 p.m. - 7:05 a.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 30m1 stop Calgary
C$ 408WestJet
Fri, 8 Jan - Sat, 16 Jan
Air Canada Logo
7:30 a.m. - 2:37 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
10h 07m1 stop Vancouver Intl
Air Canada Logo
8:15 a.m. - 8:33 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
9h 18m1 stop Vancouver Intl
C$ 441Air Canada
Tue, 10 Nov - Sat, 21 Nov
Air Canada Logo
7:30 a.m. - 2:37 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
10h 07m1 stop Vancouver Intl
Air Canada Logo
8:40 a.m. - 7:35 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
7h 55m1 stop Vancouver Intl
C$ 460Air Canada
Wed, 23 Sep - Tue, 29 Sep
American Airlines Logo
5:34 p.m. - 12:11 a.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
9h 37m1 stop Chicago O'Hare Intl
American Airlines Logo
8:20 a.m. - 9:42 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
10h 22m1 stop Philadelphia
C$ 481American Airlines
Wed, 20 Jan - Tue, 26 Jan
United Airlines Logo
7:00 a.m. - 8:48 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
16h 48m2 stops Newark San Francisco
United Airlines Logo
8:00 a.m. - 7:38 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 38m1 stop Washington, D.C. Dulles Intl
C$ 539United Airlines
Wed, 20 Jan - Tue, 26 Jan
United Airlines Logo
7:00 a.m. - 6:09 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
14h 09m2 stops Newark Denver Intl
United Airlines Logo
5:07 a.m. - 9:17 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
13h 10m2 stops Denver Intl Chicago O'Hare Intl
C$ 539United Airlines
Thu, 22 Oct - Mon, 26 Oct
Multiple Airlines Logo
6:45 a.m. - 6:45 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
15h 00m2 stops Toronto Pearson Intl Calgary
Multiple Airlines Logo
8:40 a.m. - 8:43 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
9h 03m1 stop Vancouver Intl
C$ 540Multiple Airlines
Tue, 23 Feb - Tue, 2 Mar
American Airlines Logo
12:59 p.m. - 10:01 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
12h 02m1 stop Philadelphia
American Airlines Logo
11:59 p.m. - 3:24 p.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
12h 25m2 stops Chicago O'Hare Intl Philadelphia
C$ 547American Airlines
Fri, 23 Oct - Sun, 1 Nov
Multiple Airlines Logo
6:45 a.m. - 6:45 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
15h 00m2 stops Toronto Pearson Intl Calgary
Multiple Airlines Logo
3:15 p.m. - 7:10 a.m.SEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
12h 55m2 stops Vancouver Intl Calgary
C$ 557Multiple 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 from Montreal Pierre Elliott Trudeau Intl Airport to Seattle 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 start at C$ 400. Prices are below average for this route right now, with typical round-trip fares ranging from C$ 580 to C$ 899. The lowest price found in the past 5 days was C$ 400 on WestJet.

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

Thursday is the cheapest day of the week to fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle and is 6% cheaper than the average day. Friday is the most expensive day with flight prices 5% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • February is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle at C$ 575 round-trip.
  • June (C$ 804) and December (C$ 753) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 39% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices 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 57% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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.

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.

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.

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

Low season

February

Cheapest flight

C$ 247
Best time to beat the crowds (20% less expensive on average)
Most popular time to fly (3% more expensive on average)
Flights 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 route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • 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 free seat selection

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

  • 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 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

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

  • 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
    • Premium Economy Class
    • First Class

  • 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$ 461 round-trip via Dallas/Fort Worth (DFW), compared to C$ 730 for direct.

  • 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) – 34% of one-stop connections
    • Vancouver Intl (YVR) – 28% of one-stop connections
    • Calgary (YYC) – 26% of one-stop connections
    • Chicago O'Hare Intl (ORD) – 5% of one-stop connections

    Toronto Pearson Intl (YYZ) handles the largest share of one-stop connections on this route.

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

    Yes. Being flexible with your travel dates can save you up to 10% on the Montreal Pierre Elliott Trudeau Intl Airport to Seattle route. Thursday is the cheapest departure day at C$ 684 round-trip on average, while Friday is the most expensive at C$ 760, a difference of C$ 76. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • Which popular places can I visit in Seattle?

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

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

    Last-minute fares on this route – booked within 2 weeks of departure – run 54% above the route average of C$ 720. Book 16 weeks before departure for the lowest fares.

  • 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 0h 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.

  • 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$ 400 to C$ 1,779. That means the highest observed fare was about 4x higher than the lowest one.

  • 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$ 295, which is 35% below the typical average for this route.

  • 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 15m, compared with 8h 42m via Vancouver Intl (YVR) and 8h 44m via Detroit Metropolitan Wayne County (DTW).

  • 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.

  • 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 starting from around C$ 5 for economy cars. Top options include:
    · Fox
    · Europcar
    · Thrifty
    · Budget
    · Dollar

  • 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$ 580 to C$ 899, with an average of C$ 720 over the past 12 months. Anything below C$ 580 counts as a good deal.

  • 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.

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 instead of Friday. On this route, Thursday flights average C$ 684 – about C$ 76 less than Friday (10% 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 57% 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 February. Fares historically average C$ 575 round-trip in that month – typically C$ 229 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 Dallas/Fort Worth Airport (DFW) can be cheaper than flying direct. The cheapest layover option averages C$ 461 round-trip on this route – about C$ 269 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.
    - Seattle Airport Marriott
    - Coast Gateway Hotel
    - 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