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Flights from Seattle to Montreal

Seattle to Montreal Flight Information

The approximate distance between Seattle and Montreal is 3,675.87 km. According to Trip.com data, travel demand hits its peak in January.

Cheapest one-way
US$130
WestJet WestJet SEA-YMQ 8h 30m · 1 stop Sun, Aug 16
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Cheapest round-trip
US$389
Delta Air Lines Delta Air Lines SEA-YMQ 7h 19m · 2 stops Mon, Oct 5 - Thu, Oct 8
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Recommended airlines
WestJet WestJet Cheapest · From US$130 Delta Air Lines Delta Air Lines Most booked
When to fly
October
Cheapest
January
Peak season
Route details
3,675.87 km
Flight distance

Search cheap flights from Seattle to Montreal in the next 3 months. Based on Trip.com's latest 7-day data, one-way fares start at US$130, and round-trip tickets start at US$389.

      • SEA 06:00
        7h 19m
        1 stop
        YUL 16:19
        Seattle - Montreal | Mon, Oct 5 | Delta Air Lines
        YUL 06:00
        11h 49m
        1 stop
        SEA 14:49
        Montreal - Seattle | Thu, Oct 8 | Delta Air Lines
        US$389 US$419
        7% off
        7% off
        US$419 US$389
      • SEA 11:35
        9h 15m
        1 stop
        YUL 23:50
        Seattle - Montreal | Fri, Oct 2 | Delta Air Lines
        YUL 07:00
        12h 45m
        1 stop
        SEA 16:45
        Montreal - Seattle | Mon, Oct 5 | Delta Air Lines
        US$389 US$419
        7% off
        7% off
        US$419 US$389
      • SEA 11:18
        9h 12m
        1 stop
        YUL 23:30
        Seattle - Montreal | Mon, Sep 21 | Delta Air Lines
        YUL 12:48
        12h 17m
        1 stop
        SEA 22:05
        Montreal - Seattle | Fri, Sep 25 | Delta Air Lines
        US$389 US$419
        7% off
        7% off
        US$419 US$389
      • SEA 09:10
        11h 42m
        1 stop
        YUL 23:52
        Seattle - Montreal | Fri, Sep 11 | Delta Air Lines
        YUL 12:47
        12h 18m
        1 stop
        SEA 22:05
        Montreal - Seattle | Mon, Sep 14 | Delta Air Lines
        US$389
        7% off
        US$419 US$389
      • SEA 19:35
        8h 30m
        1 stop
        YUL 07:05
        Seattle - Montreal | Sun, Sep 13 | WestJet
        YUL 07:00
        12h
        1 stop
        SEA 16:00
        Montreal - Seattle | Fri, Sep 18 | Delta Air Lines
        US$391
        7% off
        US$419 US$391
      • SEA 19:35
        8h 30m
        1 stop
        YUL 07:05
        Seattle - Montreal | Mon, Sep 7 | WestJet
        YUL 12:47
        12h 18m
        1 stop
        SEA 22:05
        Montreal - Seattle | Mon, Sep 14 | Delta Air Lines
        US$391
        7% off
        US$419 US$391
      • SEA 19:35
        8h 30m
        1 stop
        YUL 07:05
        Seattle - Montreal | Sun, Sep 6 | WestJet
        YUL 12:47
        12h 18m
        1 stop
        SEA 22:05
        Montreal - Seattle | Thu, Sep 10 | Delta Air Lines
        US$391
        7% off
        US$419 US$391
      • SEA 19:35
        8h 30m
        1 stop
        YUL 07:05
        Seattle - Montreal | Mon, Aug 31 | WestJet
        YUL 12:47
        12h 18m
        1 stop
        SEA 22:05
        Montreal - Seattle | Thu, Sep 3 | Delta Air Lines
        US$391
        7% off
        US$419 US$391
      • SEA 19:35
        8h 30m
        1 stop
        YUL 07:05
        Seattle - Montreal | Sat, Aug 29 | WestJet
        YUL 12:44
        14h 13m
        1 stop
        SEA 23:57
        Montreal - Seattle | Thu, Sep 3 | Delta Air Lines
        US$391
        7% off
        US$419 US$391
      • SEA 15:35
        17h 8m
        1 stop
        YUL 11:43
        Seattle - Montreal | Thu, Sep 10 | American Airlines
        YUL 12:47
        12h 18m
        1 stop
        SEA 22:05
        Montreal - Seattle | Mon, Sep 14 | Delta Air Lines
        US$393
        6% off
        US$419 US$393
      • SEA 13:00
        17h 25m
        1 stop
        YMQ 14:00
        Seattle - Montreal | Thu, Aug 13 | Normal Airline
        YMQ 15:00
        6h
        Nonstop
        SEA 16:00
        Montreal - Seattle | Sat, Aug 15 | Normal Airline
        More cheap flights
        More cheap flights
      • SEA 19:35
        8h 30m
        1 stop
        YUL 07:05
        Seattle - Montreal | Sun, Aug 16 | WestJet
        US$130 US$194
        33% off
        33% off
        US$194 US$130
      • SEA 19:35
        8h 30m
        1 stop
        YUL 07:05
        Seattle - Montreal | Sat, Aug 15 | WestJet
        US$130 US$194
        33% off
        33% off
        US$194 US$130
      • SEA 11:35
        9h 15m
        1 stop
        YUL 23:50
        Seattle - Montreal | Thu, Oct 1 | Delta Air Lines
        US$163 US$194
        16% off
        16% off
        US$194 US$163
      • SEA 08:59
        11h 51m
        1 stop
        YUL 23:50
        Seattle - Montreal | Fri, Oct 2 | Delta Air Lines
        US$163
        16% off
        US$194 US$163
      • SEA 07:00
        21h 5m
        1 stop
        YUL 07:05
        Seattle - Montreal | Wed, Aug 26 | WestJet
        US$171
        12% off
        US$194 US$171
      • SEA 19:35
        8h 30m
        1 stop
        YUL 07:05
        Seattle - Montreal | Fri, Oct 9 | WestJet
        US$172
        11% off
        US$194 US$172
      • SEA 19:35
        8h 30m
        1 stop
        YUL 07:05
        Seattle - Montreal | Sat, Sep 19 | WestJet
        US$173
        11% off
        US$194 US$173
      • SEA 19:35
        8h 30m
        1 stop
        YUL 07:05
        Seattle - Montreal | Mon, Oct 5 | WestJet
        US$178
        8% off
        US$194 US$178
      • SEA 06:00
        7h 19m
        1 stop
        YUL 16:19
        Seattle - Montreal | Mon, Sep 28 | Delta Air Lines
        US$182
        6% off
        US$194 US$182
      • SEA 08:59
        11h 51m
        1 stop
        YUL 23:50
        Seattle - Montreal | Mon, Sep 21 | Delta Air Lines
        US$182
        6% off
        US$194 US$182
      • SEA 13:00
        17h 25m
        1 stop
        YMQ 14:00
        Seattle - Montreal | Thu, Aug 13 | Normal Airline
        More cheap flights
        More cheap flights

Popular airlines flying from Seattle to Montreal

You can choose from 1 airlines that fly from Seattle to Montreal, including Delta Air Lines, WestJet has lowest fares on this route.
Delta Air Lines logo Delta Air Lines
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 US$130 on Cheapest nonstop routes (e.g. SEA to YUL on Sun, Aug 16), while Delta Air Lines offers Cheapest nonstop round-trips from US$389 departing on Mon, Oct 5 and returning on Thu, Oct 8.
  • At the moment, several airlines serve connecting flights from Seattle to Montreal, including: Delta Air Lines Selected airlines are based on historical data collected from flight bookings made by users on Trip.com within the last 90 days.
  • 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.
  • 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 Sun, Aug 16, with one-way flights priced at just US$130.
    · 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 August flight calendar, it's currently cheapest to fly from Seattle to Montreal on August 14, 2026 with WestJet, with prices starting at US$124.
  • You can land at any one of the following hubs in Montreal, with Seattle-Tacoma International Airport to Montréal-Pierre Elliott Trudeau International Airport (SEA-YUL) is by far the most common option on this route: Montreal Metropolitan Airport (YHU) Montréal-Mirabel International Airport (YMX) Montréal-Pierre Elliott Trudeau International Airport (YUL).
  • 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 US$342. 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.

Trip.com Airline Insights on Flights from Seattle to Montreal

Which airline offers the cheapest direct flights from Seattle to Montreal?

Data is based on the average price of all nonstop flights from Seattle to Montreal on Trip.com over the past 12 months.

Based on Trip.com’s data from the past 12 months, United Airlines provides the lowest-priced direct flights from Seattle to Montreal, with fares starting at US$168.

US$69
US$168
US$268
US$367
US$466
United Airlines
US$168
United Airlines
WestJet
US$264
WestJet
Air Canada
US$390
Air Canada
American Airlines
US$446
American Airlines
Delta Air Lines
US$466
Delta Air Lines

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

Book with no extra fees

Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.