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Flights from Seattle to Montreal

What to know about flights from Seattle to Montreal?

The distance between Seattle and Montreal is approximately 3,675.87 km. It takes around 5 hours on average to fly from Seattle to Montreal. Based on Trip.com's data, travel demand peaks in January.

Cheapest one-way
$135
WestJet WestJet SEA-YMQ 8h 30m · 1 stop Tue, Oct 20
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Cheapest round-trip
$430
American Airlines American Airlines SEA-YMQ 8h 50m · 2 stops Sun, Nov 22 - Thu, Nov 26
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Recommended airlines
WestJet WestJetCheapest· From $135 WestJet WestJetMost booked
When to travel
October
Cheapest
January
Peak season for travel
Route details
3,675.87 km
Flight distance
5h
Average flight time

Explore the cheapest one-way and round-trip flights from Seattle to Montreal over the next 90 days, with one-way fares from $135 and round-trip from $430. Based on Trip.com's latest 7-day flight data.

    • SEA 11:36 PM
      8h 50m
      YUL 11:26 AM
      Seattle - Montreal | Sun, Nov 22 | American Airlines
      YUL 7:10 AM
      13h
      SEA 5:10 PM
      Montreal - Seattle | Thu, Nov 26 | Delta Air Lines
      $430 $599
      28% off
      28% off
      $599 $430
    • SEA 9:45 AM
      10h 42m
      YUL 11:27 PM
      Seattle - Montreal | Wed, Nov 18 | Delta Air Lines
      YUL 4:15 PM
      24h 25m
      SEA 1:40 PM
      Montreal - Seattle | Fri, Nov 20 | WestJet
      $469 $599
      22% off
      22% off
      $599 $469
    • SEA 2:30 PM
      21h 20m
      YUL 2:50 PM
      Seattle - Montreal | Wed, Nov 18 | WestJet
      YUL 4:15 PM
      24h 25m
      SEA 1:40 PM
      Montreal - Seattle | Fri, Nov 20 | WestJet
      $477 $599
      20% off
      20% off
      $599 $477
    • SEA 10:10 AM
      7h 20m
      YUL 8:30 PM
      Seattle - Montreal | Sun, Nov 22 | Air Canada
      YUL 7:10 AM
      13h
      SEA 5:10 PM
      Montreal - Seattle | Thu, Nov 26 | Delta Air Lines
      $478
      20% off
      $599 $478
    • SEA 2:30 PM
      21h 20m
      YUL 2:50 PM
      Seattle - Montreal | Tue, Dec 15 | WestJet
      YUL 7:00 AM
      12h 53m
      SEA 4:53 PM
      Montreal - Seattle | Sun, Dec 20 | Delta Air Lines
      $482
      20% off
      $599 $482
    • SEA 2:20 PM
      21h 30m
      YUL 2:50 PM
      Seattle - Montreal | Sat, Dec 12 | WestJet
      YUL 7:10 AM
      13h
      SEA 5:10 PM
      Montreal - Seattle | Wed, Dec 16 | Delta Air Lines
      $482
      20% off
      $599 $482
    • SEA 2:30 PM
      21h 20m
      YUL 2:50 PM
      Seattle - Montreal | Wed, Dec 9 | WestJet
      YUL 7:10 AM
      8h 21m
      SEA 12:31 PM
      Montreal - Seattle | Wed, Dec 16 | Delta Air Lines
      $482
      20% off
      $599 $482
    • SEA 2:30 PM
      24h 5m
      YUL 5:35 PM
      Seattle - Montreal | Thu, Dec 3 | WestJet
      YUL 6:00 AM
      12h 3m
      SEA 3:03 PM
      Montreal - Seattle | Thu, Dec 10 | Delta Air Lines
      $482
      20% off
      $599 $482
    • SEA 2:30 PM
      21h 20m
      YUL 2:50 PM
      Seattle - Montreal | Wed, Nov 11 | WestJet
      YUL 6:00 AM
      11h 50m
      SEA 2:50 PM
      Montreal - Seattle | Wed, Nov 18 | Delta Air Lines
      $483
      19% off
      $599 $483
    • SEA 1:00 PM
      17h 25m
      1 stop
      YMQ 2:00 PM
      Seattle - Montreal | Sun, Oct 18 | Normal Airline
      YMQ 3:00 PM
      6h
      Nonstop
      SEA 4:00 PM
      Montreal - Seattle | Tue, Oct 20 | Normal Airline
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    • Cheapest
      SEA 7:35 PM
      8h 30m
      1 stop
      YUL 7:05 AM
      Seattle - Montreal | Tue, Oct 20 | WestJet
      $135 $226
      40% off
      40% off
      $226 $135
    • SEA 8:02 AM
      20h 3m
      1 stop
      YUL 7:05 AM
      Seattle - Montreal | Tue, Oct 20 | Alaska Airlines
      $162 $226
      28% off
      28% off
      $226 $162
    • SEA 10:30 AM
      10h 15m
      1 stop
      YUL 11:45 PM
      Seattle - Montreal | Sat, Oct 24 | WestJet
      $168 $226
      26% off
      26% off
      $226 $168
    • SEA 9:15 AM
      9h 11m
      1 stop
      YUL 9:26 PM
      Seattle - Montreal | Wed, Dec 2 | American Airlines
      $182
      19% off
      $226 $182
    • SEA 11:34 PM
      8h 51m
      1 stop
      YUL 11:25 AM
      Seattle - Montreal | Thu, Dec 3 | American Airlines
      $182
      19% off
      $226 $182
    • SEA 11:34 PM
      8h 51m
      1 stop
      YUL 11:25 AM
      Seattle - Montreal | Sat, Dec 5 | American Airlines
      $183
      19% off
      $226 $183
    • SEA 11:34 PM
      8h 51m
      1 stop
      YUL 11:25 AM
      Seattle - Montreal | Mon, Dec 7 | American Airlines
      $183
      19% off
      $226 $183
    • SEA 11:34 PM
      8h 51m
      1 stop
      YUL 11:25 AM
      Seattle - Montreal | Mon, Dec 14 | American Airlines
      $183
      19% off
      $226 $183
    • SEA 11:34 PM
      8h 51m
      1 stop
      YUL 11:25 AM
      Seattle - Montreal | Tue, Dec 15 | American Airlines
      $183
      19% off
      $226 $183
    • SEA 1:00 PM
      17h 25m
      1 stop
      YMQ 2:00 PM
      Seattle - Montreal | Sun, Oct 18 | Normal Airline
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    • SEA 7:35 PM
      8h 30m
      1 stop
      YUL 7:05 AM
      Seattle - Montreal | Tue, Oct 20 | WestJet
      $135 $820
      84% off
      84% off
      $820 $135
    • SEA 1:50 PM
      6h 40m
      1 stop
      YUL 11:30 PM
      Seattle - Montreal | Sat, Nov 14 | Delta Air Lines
      $198 $820
      76% off
      76% off
      $820 $198
    • SEA 10:10 AM
      7h 33m
      1 stop
      YUL 8:43 PM
      Seattle - Montreal | Mon, Oct 26 | Air Canada
      $201 $820
      75% off
      75% off
      $820 $201
    • SEA 10:10 AM
      7h 33m
      1 stop
      YUL 8:43 PM
      Seattle - Montreal | Sat, Oct 31 | Air Canada
      $246
      70% off
      $820 $246
    • SEA 10:10 AM
      7h 33m
      1 stop
      YUL 8:43 PM
      Seattle - Montreal | Fri, Oct 30 | Air Canada
      $270
      67% off
      $820 $270
    • SEA 10:10 AM
      7h 20m
      1 stop
      YUL 8:30 PM
      Seattle - Montreal | Sun, Nov 1 | Air Canada
      $285
      65% off
      $820 $285
    • SEA 10:10 AM
      7h 33m
      1 stop
      YUL 8:43 PM
      Seattle - Montreal | Wed, Oct 28 | Air Canada
      $288
      65% off
      $820 $288
    • SEA 10:10 AM
      7h 20m
      1 stop
      YUL 8:30 PM
      Seattle - Montreal | Fri, Dec 4 | Air Canada
      $305
      63% off
      $820 $305
    • SEA 5:50 AM
      8h 9m
      1 stop
      YUL 4:59 PM
      Seattle - Montreal | Sat, Oct 24 | Air Canada
      $396
      52% off
      $820 $396
    • SEA 1:00 PM
      17h 25m
      1 stop
      YMQ 2:00 PM
      Seattle - Montreal | Sun, Oct 18 | Normal Airline
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    • SEA 7:35 PM
      8h 30m
      1 stop
      YUL 7:05 AM
      Seattle - Montreal | Tue, Oct 20 | WestJet
      $135 $609
      78% off
      78% off
      $609 $135
    • SEA 6:00 AM
      7h 15m
      1 stop
      YUL 4:15 PM
      Seattle - Montreal | Sat, Oct 17 | Delta Air Lines
      $336 $609
      45% off
      45% off
      $609 $336
    • SEA 5:50 AM
      8h 9m
      1 stop
      YUL 4:59 PM
      Seattle - Montreal | Wed, Oct 21 | Air Canada
      $383 $609
      37% off
      37% off
      $609 $383
    • SEA 11:59 PM
      8h 45m
      1 stop
      YUL 11:44 AM
      Seattle - Montreal | Mon, Oct 19 | American Airlines
      $405
      33% off
      $609 $405
    • SEA 6:12 AM
      7h 40m
      1 stop
      YUL 4:52 PM
      Seattle - Montreal | Sun, Oct 18 | American Airlines
      $405
      33% off
      $609 $405
    • SEA 7:35 PM
      8h 30m
      1 stop
      YUL 7:05 AM
      Seattle - Montreal | Thu, Oct 22 | WestJet
      $493
      19% off
      $609 $493
    • SEA 1:00 PM
      17h 25m
      1 stop
      YMQ 2:00 PM
      Seattle - Montreal | Sun, Oct 18 | Normal Airline
      Find more flights
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    • SEA 10:03 AM
      6h 32m
      1 stop
      YUL 7:35 PM
      Seattle - Montreal | Sat, Nov 7 | Alaska Airlines
      $374 $807
      54% off
      54% off
      $807 $374
    • SEA 1:50 PM
      6h 40m
      1 stop
      YUL 11:30 PM
      Seattle - Montreal | Sat, Nov 14 | Delta Air Lines
      $198 $807
      75% off
      75% off
      $807 $198
    • SEA 1:50 PM
      6h 40m
      1 stop
      YUL 11:30 PM
      Seattle - Montreal | Mon, Nov 23 | Delta Air Lines
      $653 $807
      19% off
      19% off
      $807 $653
    • SEA 1:50 PM
      6h 40m
      1 stop
      YUL 11:30 PM
      Seattle - Montreal | Fri, Nov 27 | Delta Air Lines
      $429
      47% off
      $807 $429
    • SEA 1:50 PM
      6h 40m
      1 stop
      YUL 11:30 PM
      Seattle - Montreal | Fri, Nov 13 | Delta Air Lines
      $213
      74% off
      $807 $213
    • SEA 10:10 AM
      7h 20m
      1 stop
      YUL 8:30 PM
      Seattle - Montreal | Wed, Dec 23 | Air Canada
      $412
      49% off
      $807 $412
    • SEA 10:10 AM
      7h 20m
      1 stop
      YUL 8:30 PM
      Seattle - Montreal | Wed, Dec 30 | Air Canada
      $289
      64% off
      $807 $289
    • SEA 10:10 AM
      7h 20m
      1 stop
      YUL 8:30 PM
      Seattle - Montreal | Thu, Dec 31 | Air Canada
      $321
      60% off
      $807 $321
    • SEA 10:10 AM
      7h 20m
      1 stop
      YUL 8:30 PM
      Seattle - Montreal | Mon, Dec 28 | Air Canada
      $321
      60% off
      $807 $321
    • SEA 1:00 PM
      17h 25m
      1 stop
      YMQ 2:00 PM
      Seattle - Montreal | Sun, Oct 18 | Normal Airline
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Displayed flight fares from Seattle to Montreal are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Which airlines are the most popular for Seattle to Montreal flights?

The most popular airlines flying from Seattle to Montreal are WestJet, American Airlines, and Delta Air Lines, among 4 carriers on this route. WestJet offers the lowest fares. Based on Trip.com's flight booking data from the previous 12 months.
WestJet logo WestJet
American Airlines logo American Airlines
Delta Air Lines logo Delta Air Lines
United Airlines logo United Airlines
Airlines are determined based on actual purchased flight tickets from Seattle to Montreal according to previous 12 months data from Trip.com.

Frequently Asked Questions

  • What are the cheapest flights from Seattle to Montreal (SEA-YMQ)?

    Based on Trip.com data, WestJet offers one-way fares as low as $135 on Cheapest nonstop routes (e.g. SEA to YUL on Tue, Oct 20), while American Airlines offers Cheapest nonstop round-trips from $430 departing on Sun, Nov 22 and returning on Thu, Nov 26.
  • At the moment, you can catch a nonstop flight from Seattle to Montreal with the following airlines, including: Air Canada Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes around 5 hours to fly from Seattle (SEA) to Montreal (YMQ).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to Montreal is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 1 flight per week flying from Seattle to Montreal. You can check the weekly schedule for popular airlines on this route below: United Airlines: S/M/-/-/-/-/- -- UA8086 (07:39)
  • To find best deals on flights from Seattle to Montreal, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Oct 20, with one-way flights priced at just $135.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is WestJet.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Montreal travel is around January.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Seattle to Montreal is October, when demand for travel is lower.
  • After crunching the numbers on our October flight calendar, it's currently cheapest to fly from Seattle to Montreal on October 20, 2026 with WestJet, with prices starting at $310.
  • You can arrive at any of the following airports in Montreal: Montréal-Pierre Elliott Trudeau International Airport (YUL), Montreal Metropolitan Airport (YHU), and Montréal-Mirabel International Airport (YMX). Flights from Seattle-Tacoma International Airport to Montréal-Pierre Elliott Trudeau International Airport (SEA-YUL) are by far the most popular option for this route.
  • The time difference between Montreal and Seattle is 3h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.
  • Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Seattle to Montreal is $344. Fares vary by travel date, airline and availability.
  • Enter Seattle and Montreal, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.
  • WestJetare the most popular budget airlines flying from Seattle to Montreal. Check baggage, seat and payment fees before comparing the final price.

Explore More Popular Flights

Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.