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Cheap flights from Montreal to Seattle from $189

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 9/5. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Montreal to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
6:45 am - 6:45 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
15h 00m2 stops Toronto Pearson Intl Calgary
WestJet Logo
7:35 pm - 7:05 amSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 30m1 stop Calgary
$317WestJet
Tue, Sep 15 - Tue, Sep 22
WestJet Logo
6:45 am - 6:45 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
15h 00m2 stops Toronto Pearson Intl Calgary
WestJet Logo
7:35 pm - 7:05 amSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 30m1 stop Calgary
$320WestJet
Sat, Sep 26 - Sat, Oct 3
Air Canada Logo
6:00 pm - 10:42 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
7h 42m1 stop Vancouver Intl
Air Canada Logo
5:40 am - 4:54 pmSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 14m1 stop Vancouver Intl
$331Air Canada
Sat, Oct 3 - Sat, Oct 10
Air Canada Logo
6:00 pm - 10:47 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
7h 47m1 stop Vancouver Intl
Air Canada Logo
5:40 am - 4:54 pmSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 14m1 stop Vancouver Intl
$341Air Canada
Wed, Sep 30 - Wed, Oct 14
Delta Logo
6:00 am - 2:49 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
11h 49m1 stop Detroit Metropolitan Wayne County
Delta Logo
8:59 am - 11:50 pmSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
11h 51m1 stop Atlanta Hartsfield-Jackson
$346Delta
Wed, Sep 9 - Tue, Sep 15
Delta Logo
6:00 am - 2:49 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
11h 49m1 stop Detroit Metropolitan Wayne County
Delta Logo
9:43 am - 11:27 pmSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
10h 44m1 stop Detroit Metropolitan Wayne County
$346Delta
Wed, Sep 9 - Wed, Sep 16
American Airlines Logo
12:31 pm - 9:52 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
12h 21m2 stops Chicago O'Hare Intl Dallas/Fort Worth
American Airlines Logo
6:12 am - 9:30 pmSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
12h 18m2 stops Chicago O'Hare Intl Philadelphia
$360American Airlines
Wed, Sep 30 - Wed, Oct 14
American Airlines Logo
7:29 am - 4:42 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
12h 13m2 stops Charlotte Douglas Dallas/Fort Worth
American Airlines Logo
6:18 am - 9:42 pmSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
12h 24m2 stops Chicago O'Hare Intl Philadelphia
$360American Airlines
Tue, Sep 15 - Tue, Sep 22
United Airlines Logo
9:45 am - 6:52 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
12h 07m1 stop Chicago O'Hare Intl
United Airlines Logo
11:14 pm - 2:40 pmSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
12h 26m1 stop Washington, D.C. Dulles Intl
$362United Airlines
Sat, Sep 26 - Sat, Oct 3
United Airlines Logo
9:45 am - 8:37 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
13h 52m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl
United Airlines Logo
7:25 pm - 10:40 amSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
12h 15m2 stops San Francisco Chicago O'Hare Intl
$362United Airlines
Sat, Sep 26 - Sat, Oct 3

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WestJet flights from Montreal to Seattle

Our best WestJet deals on Montreal to Seattle flight tickets
WestJet
Sep 15
YUL6:45 amMontreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 pmSeattle/Tacoma Intl
Sep 22
SEA7:35 pmSeattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 amMontreal Pierre Elliott Trudeau Intl
$317
WestJet
Sep 26
YUL6:45 amMontreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 pmSeattle/Tacoma Intl
Oct 3
SEA7:35 pmSeattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 amMontreal Pierre Elliott Trudeau Intl
$320
WestJet
Sep 26
YUL6:45 amMontreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 pmSeattle/Tacoma Intl
Oct 3
SEA10:30 amSeattle/Tacoma Intl
10h 55m
2 stops
YUL12:25 amMontreal Pierre Elliott Trudeau Intl
$326

Delta flights from Montreal to Seattle

Our best Delta deals on Montreal to Seattle flight tickets
Delta
Sep 9
YUL6:00 amMontreal Pierre Elliott Trudeau Intl
11h 49m
1 stop
SEA2:49 pmSeattle/Tacoma Intl
Sep 16
SEA9:43 amSeattle/Tacoma Intl
10h 44m
1 stop
YUL11:27 pmMontreal Pierre Elliott Trudeau Intl
$346
Delta
Sep 15
YUL6:00 amMontreal Pierre Elliott Trudeau Intl
7h 26m
1 stop
SEA10:26 amSeattle/Tacoma Intl
Sep 22
SEA9:43 amSeattle/Tacoma Intl
10h 44m
1 stop
YUL11:27 pmMontreal Pierre Elliott Trudeau Intl
$347
Delta
Aug 20
YUL12:44 pmMontreal Pierre Elliott Trudeau Intl
14h 13m
1 stop
SEA11:57 pmSeattle/Tacoma Intl
Aug 28
SEA10:35 pmSeattle/Tacoma Intl
12h 06m
1 stop
YUL1:41 pmMontreal Pierre Elliott Trudeau Intl
$419

momondo Fare Finder

 
Customize your flight search to find flights from Montreal to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 7, 2026.
Use the filters below to find and compare flights from Montreal to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealSeattle

YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 9/15

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Tue 9/22

7:35 pm-7:05 am

1 stop8h 30m

$317

MontrealSeattle

YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 9/26

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Sat 10/3

7:35 pm-7:05 am

1 stop8h 30m

$320
Quickest round-trip

MontrealSeattle

YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 10/3

6:00 pm-10:42 pm

1 stop7h 42m

Seattle/Tacoma Intl

Sat 10/10

5:40 am-4:54 pm

1 stop8h 14m

$331

MontrealSeattle

YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 9/30

6:00 pm-10:47 pm

1 stop7h 47m

Seattle/Tacoma Intl

Wed 10/14

5:40 am-4:54 pm

1 stop8h 14m

$341

MontrealSeattle

YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 9/9

6:00 am-2:49 pm

1 stop11h 49m

Seattle/Tacoma Intl

Tue 9/15

8:59 am-11:50 pm

1 stop11h 51m

$346

MontrealSeattle

YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 9/9

6:00 am-2:49 pm

1 stop11h 49m

Seattle/Tacoma Intl

Wed 9/16

9:43 am-11:27 pm

1 stop10h 44m

$346

MontrealSeattle

YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 9/30

12:31 pm-9:52 pm

2 stops12h 21m

Seattle/Tacoma Intl

Wed 10/14

6:12 am-9:30 pm

2 stops12h 18m

$360

MontrealSeattle

YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 9/15

7:29 am-4:42 pm

2 stops12h 13m

Seattle/Tacoma Intl

Tue 9/22

6:18 am-9:42 pm

2 stops12h 24m

$360

MontrealSeattle

YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 9/26

9:45 am-6:52 pm

1 stop12h 07m

Seattle/Tacoma Intl

Sat 10/3

11:14 pm-2:40 pm

1 stop12h 26m

$362

MontrealSeattle

YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 9/26

9:45 am-8:37 pm

2 stops13h 52m

Seattle/Tacoma Intl

Sat 10/3

7:25 pm-10:40 am

2 stops12h 15m

$362

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 typical price of a round-trip flight between Montreal and Seattle?

Prices are currently low for flights on this route.

Typical prices usually range from $413 to $618.
The lowest price recently found on this route was $317.

What is the cheapest month to fly to Seattle?

In general, September is the cheapest month to fly from Montreal to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $455. If you don’t want to visit Seattle in September, then you should wait until March to fly from Montreal, when ticket prices are also cheap, with an average price of $457.

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

On average, the least expensive day to fly to Seattle from Montreal is on a Friday. momondo users have found tickets for Friday departures for as low as $386. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Wednesday is the most expensive day to depart from Montreal because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $638.

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 from Montreal 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 $507 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 $304 on momondo.

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

There is only 1 cabin class available to choose from on Montreal to Seattle 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 7% 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 August 2026, prices for Montreal to Seattle flights are approximately 24% more expensive 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

Fastest flight time

7h 26m

Direct flights

None
The fastest flight from Montreal to Seattle takes 7h 26m
There are no direct flights from Montreal to Seattle. There are no popular flight routes from Montreal to Seattle.
Search flight deals

Frequently asked questions about flying from Montreal to Seattle

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

    Montreal and Seattle/Tacoma Intl are 2282.0 mi apart from one another. Typically, this will take 7h 26m by plane in normal conditions.

  • 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 a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 $293Free CancellationRating
7.2
3,426 reviews
Search WestJet flights
Air CanadaPriceFrom $326Free CancellationRating
7.1
11,433 reviews
Search Air Canada flights
DeltaPriceFrom $388Free CancellationRating
7.8
8,496 reviews
Search Delta flights
United AirlinesPriceFrom $594Free CancellationRating
7.4
10,075 reviews
Search United Airlines flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Kent
Lynnwood
Redmond
Lakewood
Puyallup
Fife
Federal Way
Tukwila
Cle Elum
Marysville
Kirkland
Centralia
Shoreline
Lacey

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from Montreal.

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

Yes. momondo enables you to select and highlight flights to Seattle from Montreal with this policy.

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

Once all potential Montreal to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Montreal to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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