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Cheap flights from Montreal to Seattle from C$ 273

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Montreal to Seattle departing on 15/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Cheap round-trip flights

WestJet Logo
7:00 a.m. - 12:58 p.m.YUL-SEA
8h 58m1 stop
WestJet Logo
2:05 p.m. - 12:43 a.m.SEA-YUL
7h 38m1 stop
C$ 511WestJet
Find Deal
Tue, 19 Aug - Tue, 26 Aug
 Logo
7:00 a.m. - 12:59 p.m.YUL-SEA
8h 59m1 stop
 Logo
3:39 p.m. - 2:12 p.m.SEA-YUL
19h 33m2 stops
C$ 512
Find Deal
Tue, 9 Sep - Fri, 19 Sep
 Logo
7:00 a.m. - 12:59 p.m.YUL-SEA
8h 59m1 stop
 Logo
1:15 p.m. - 2:12 p.m.SEA-YUL
21h 57m1 stop
C$ 522
Find Deal
Tue, 9 Sep - Fri, 19 Sep
WestJet Logo
7:00 a.m. - 12:59 p.m.YUL-SEA
8h 59m1 stop
WestJet Logo
2:05 p.m. - 12:41 a.m.SEA-YUL
7h 36m1 stop
C$ 523WestJet
Find Deal
Thu, 4 Sep - Tue, 9 Sep
Air Canada Logo
4:45 p.m. - 7:31 p.m.YUL-SEA
5h 46mdirect
Air Canada Logo
7:15 a.m. - 3:28 p.m.SEA-YUL
5h 13mdirect
C$ 557Air Canada
Find Deal
Sat, 6 Sep - Sun, 21 Sep
Air Canada Logo
8:10 a.m. - 6:36 p.m.YUL-SEA
13h 26m2 stops
Air Canada Logo
10:05 a.m. - 9:00 p.m.SEA-YUL
7h 55m1 stop
C$ 563Air Canada
Find Deal
Tue, 21 Oct - Fri, 31 Oct
United Airlines Logo
9:45 a.m. - 3:45 p.m.YUL-SEA
9h 00m1 stop
United Airlines Logo
5:30 a.m. - 7:48 p.m.SEA-YUL
11h 18m2 stops
C$ 578United Airlines
Find Deal
Sat, 25 Oct - Sat, 1 Nov
United Airlines Logo
11:23 a.m. - 12:59 a.m.YUL-SEA
16h 36m2 stops
United Airlines Logo
5:05 a.m. - 9:30 p.m.SEA-YUL
13h 25m2 stops
C$ 586United Airlines
Find Deal
Wed, 22 Oct - Fri, 31 Oct
American Airlines Logo
7:29 a.m. - 8:10 p.m.YUL-SEA
15h 41m1 stop
American Airlines Logo
12:34 a.m. - 11:35 a.m.SEA-YUL
8h 01m1 stop
C$ 587American Airlines
Find Deal
Tue, 21 Oct - Wed, 29 Oct
American Airlines Logo
12:30 p.m. - 11:41 p.m.YUL-SEA
14h 11m1 stop
American Airlines Logo
1:32 p.m. - 12:16 p.m.SEA-YUL
19h 44m2 stops
C$ 609American Airlines
Find Deal
Tue, 12 Aug - Wed, 20 Aug

WestJet flights from Montreal to Seattle

Our best WestJet deals on Montreal to Seattle flight tickets
WestJet
19 Aug
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
8h 58m
1 stop
SEA12:58 p.m.Seattle/Tacoma Intl
26 Aug
SEA2:05 p.m.Seattle/Tacoma Intl
7h 38m
1 stop
YUL12:43 a.m.Montreal Pierre Elliott Trudeau Intl
WestJet
4 Sep
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
8h 59m
1 stop
SEA12:59 p.m.Seattle/Tacoma Intl
9 Sep
SEA2:05 p.m.Seattle/Tacoma Intl
7h 36m
1 stop
YUL12:41 a.m.Montreal Pierre Elliott Trudeau Intl
WestJet
3 Sep
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
8h 59m
1 stop
SEA12:59 p.m.Seattle/Tacoma Intl
10 Sep
SEA1:50 p.m.Seattle/Tacoma Intl
7h 51m
1 stop
YUL12:41 a.m.Montreal Pierre Elliott Trudeau Intl

Air Canada flights from Montreal to Seattle

Our best Air Canada deals on Montreal to Seattle flight tickets
Air Canada
6 Sep
YUL4:45 p.m.Montreal Pierre Elliott Trudeau Intl
5h 46m
SEA7:31 p.m.Seattle/Tacoma Intl
21 Sep
SEA7:15 a.m.Seattle/Tacoma Intl
5h 13m
YUL3:28 p.m.Montreal Pierre Elliott Trudeau Intl
Air Canada
21 Oct
YUL8:10 a.m.Montreal Pierre Elliott Trudeau Intl
13h 26m
2 stops
SEA6:36 p.m.Seattle/Tacoma Intl
31 Oct
SEA10:05 a.m.Seattle/Tacoma Intl
7h 55m
1 stop
YUL9:00 p.m.Montreal Pierre Elliott Trudeau Intl
Air Canada
23 Oct
YUL1:30 p.m.Montreal Pierre Elliott Trudeau Intl
11h 46m
2 stops
SEA10:16 p.m.Seattle/Tacoma Intl
30 Oct
SEA10:05 a.m.Seattle/Tacoma Intl
7h 55m
1 stop
YUL9:00 p.m.Montreal Pierre Elliott Trudeau Intl

See travel insights to Seattle from

How to get the cheapest flight ticket from Montreal to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

If you aren’t able to travel to Seattle during the month of August, then flying in October is also cheap. Prices for this month can be found on momondo for an average of C$ 665.

What is the cheapest day to depart on your flight to Seattle?

Our data shows that Friday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 659. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around C$ 775. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

What is the cheapest time of day to depart on your flight to Seattle?

Our most recent data shows that the best time of day to fly to Seattle is in the evening. Flights from Montreal to Seattle during this time can be as low as C$ 552. Flights at noon are often more expensive with an average ticket price of C$ 746.

What is the cheapest Montreal to Seattle/Tacoma Intl flight route?

Fly from Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl for the best Montreal - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Montreal when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around C$ 688 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Montreal for as low as C$ 491 on momondo.

What cabin class options are available on Montreal to Seattle/Tacoma Intl flights?

There are 2 cabin classes available to choose from on Montreal to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Montreal to Seattle flights?

You could potentially save up to 33% on your flight if you consider stops on a Montreal to Seattle flight.

How have Montreal to Seattle flight prices changed over time?

As of July 2025, prices for Montreal to Seattle flights are approximately 11% cheaper when compared to flights at the same time last year.

When to book flights from Montreal to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Montreal to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Montreal to Seattle (YMQ to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Montreal to Seattle

Best price found

C$ 273

Fastest flight time

5h 46m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Montreal in the past 72 hours is C$ 273. The best round-trip flight deal from Montreal to Seattle found on momondo in the last 72 hours is C$ 511.
The fastest flight from Montreal to Seattle takes 5h 46m
Direct flights go from Montreal to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

  • How far is Montreal to Seattle/Tacoma Intl by plane?

    The straight-line distance from Montreal to Seattle/Tacoma Intl is 3672.5 km. In terms of flight time, this usually takes a little over 5h 46m.

  • When did momondo last update prices for flights from Montreal to Seattle/Tacoma Intl Airport?

    Prices for flights from Montreal to Seattle/Tacoma Intl Airport are updated daily.

  • How many operators does momondo search for flights from Montreal to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Montreal to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Montreal to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Montreal to Seattle?

  • What is the most popular airline from Montreal to Seattle?


Best airlines flying from Montreal to Seattle

Compare and see reviews for airlines that fly from Montreal to Seattle with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom C$ 356Free CancellationRating
7.2
2,917 reviews
Search WestJet flights
DeltaPriceFrom C$ 490Free CancellationRating
8.0
7,982 reviews
Search Delta flights
Air CanadaPriceFrom C$ 502Free CancellationRating
7.1
9,681 reviews
Search Air Canada flights
American AirlinesPriceFrom C$ 522Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom C$ 528Free CancellationRating
7.4
8,861 reviews
Search United Airlines flights
  • United Airlines Flights From Montreal to Seattle

    United Airlines operates around 7 flights from Montreal to Seattle every week. The average price of these flights found in the last 72 hours has been C$ 527, but momondo users have found United Airlines deals from Montreal to Seattle from as low as C$ 387 round-trip. United Airlines has been scored 7.4/10 in 8,861 reviews.

  • Air Canada Flights From Montreal to Seattle

    Air Canada is also a popular choice for this route. Air Canada flight deals for Montreal to Seattle start from as low as C$ 368 round-trip, depending on your selected dates, with average Air Canada deals seen on momondo around C$ 511. Air Canada operates 7 flights to Seattle from Montreal in an average week. Users have rated it 7.1/10 across 9,678 reviews.


Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Marysville
Lynnwood
Tacoma
SeaTac
Olympia
Kirkland
Tukwila
Kent
Ellensburg
Redmond
Lakewood
Ocean Shores
Shoreline
Renton
Gig Harbor
Mukilteo
Cle Elum
Poulsbo
Puyallup

Why use momondo?

Why should I use momondo to find a flight deal from Montreal to Seattle?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Montreal to Seattle . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Montreal to Seattle with flexible booking policies on momondo?

Flights from Montreal to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Montreal to Seattle?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Montreal.

I’m not ready to book a flight from Montreal to Seattle right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Montreal to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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1 adult
Tue 8/7
Tue 15/7

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