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Cheap flights from Montreal to Seattle from C$ 259

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 25/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Montreal to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
7:30 a.m. - 2:31 p.m.
YUL
-
SEA
10h 01m
1 stop
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 421WestJet
Sat, 25 Apr - Mon, 4 May
WestJet Logo
8:00 p.m. - 9:40 a.m.
YUL
-
SEA
16h 40m
1 stop
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 455WestJet
Wed, 10 Jun - Mon, 15 Jun
WestJet Logo
7:20 p.m. - 6:45 p.m.
YUL
-
SEA
26h 25m
2 stops
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 457WestJet
Wed, 10 Jun - Mon, 15 Jun
WestJet Logo
7:30 a.m. - 2:31 p.m.
YUL
-
SEA
10h 01m
1 stop
WestJet Logo
10:30 a.m. - 12:25 a.m.
SEA
-
YUL
10h 55m
2 stops
C$ 460WestJet
Sat, 25 Apr - Sun, 3 May
WestJet Logo
6:45 a.m. - 6:45 p.m.
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 461WestJet
Tue, 2 Jun - Sat, 6 Jun
WestJet Logo
7:15 a.m. - 6:45 p.m.
YUL
-
SEA
14h 30m
1 stop
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 462WestJet
Mon, 27 Apr - Mon, 4 May
WestJet Logo
8:00 p.m. - 9:40 a.m.
YUL
-
SEA
16h 40m
1 stop
WestJet Logo
10:30 a.m. - 12:25 a.m.
SEA
-
YUL
10h 55m
2 stops
C$ 464WestJet
Tue, 12 May - Tue, 19 May
WestJet Logo
8:00 p.m. - 9:40 a.m.
YUL
-
SEA
16h 40m
1 stop
WestJet Logo
10:30 a.m. - 12:25 a.m.
SEA
-
YUL
10h 55m
2 stops
C$ 471WestJet
Sun, 26 Apr - Sun, 3 May
WestJet Logo
7:20 p.m. - 6:45 p.m.
YUL
-
SEA
26h 25m
2 stops
WestJet Logo
10:30 a.m. - 12:25 a.m.
SEA
-
YUL
10h 55m
2 stops
C$ 473WestJet
Tue, 12 May - Tue, 19 May
WestJet Logo
6:45 a.m. - 6:45 p.m.
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
10:30 a.m. - 11:45 p.m.
SEA
-
YUL
10h 15m
1 stop
C$ 475WestJet
Wed, 3 Jun - Wed, 10 Jun

Delta flights from Montreal to Seattle

Our best Delta deals on Montreal to Seattle flight tickets
Delta
27 Apr
YUL12:50 p.m.Montreal Pierre Elliott Trudeau Intl
14h 03m
1 stop
SEA11:53 p.m.Seattle/Tacoma Intl
4 May
SEA11:15 p.m.Seattle/Tacoma Intl
9h 21m
1 stop
YUL11:36 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 712
Delta
19 Apr
YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl
11h 17m
1 stop
SEA2:17 p.m.Seattle/Tacoma Intl
24 Apr
SEA8:20 a.m.Seattle/Tacoma Intl
12h 06m
1 stop
YUL11:26 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 855
Delta
19 Apr
YUL12:55 p.m.Montreal Pierre Elliott Trudeau Intl
11h 55m
1 stop
SEA9:50 p.m.Seattle/Tacoma Intl
24 Apr
SEA8:30 p.m.Seattle/Tacoma Intl
12h 06m
2 stops
YUL11:36 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 925

WestJet flights from Montreal to Seattle

Our best WestJet deals on Montreal to Seattle flight tickets
WestJet
10 Jun
YUL8:00 p.m.Montreal Pierre Elliott Trudeau Intl
16h 40m
1 stop
SEA9:40 a.m.Seattle/Tacoma Intl
15 Jun
SEA7:35 p.m.Seattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 455
WestJet
10 Jun
YUL7:20 p.m.Montreal Pierre Elliott Trudeau Intl
26h 25m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
15 Jun
SEA7:35 p.m.Seattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 457
WestJet
2 Jun
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
6 Jun
SEA7:35 p.m.Seattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 461

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 96,600 searches. Data last updated 13 April 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
Quickest round-trip

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 25/4

7:30 a.m.-2:31 p.m.

1 stop10h 01m

Seattle/Tacoma Intl

Mon 4/5

7:35 p.m.-7:05 a.m.

1 stop8h 30m

C$ 421

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 10/6

8:00 p.m.-9:40 a.m.

1 stop16h 40m

Seattle/Tacoma Intl

Mon 15/6

7:35 p.m.-7:05 a.m.

1 stop8h 30m

C$ 455

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 10/6

7:20 p.m.-6:45 p.m.

2 stops26h 25m

Seattle/Tacoma Intl

Mon 15/6

7:35 p.m.-7:05 a.m.

1 stop8h 30m

C$ 457

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 25/4

7:30 a.m.-2:31 p.m.

1 stop10h 01m

Seattle/Tacoma Intl

Sun 3/5

10:30 a.m.-12:25 a.m.

2 stops10h 55m

C$ 460

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 2/6

6:45 a.m.-6:45 p.m.

2 stops15h 00m

Seattle/Tacoma Intl

Sat 6/6

7:35 p.m.-7:05 a.m.

1 stop8h 30m

C$ 461

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 27/4

7:15 a.m.-6:45 p.m.

1 stop14h 30m

Seattle/Tacoma Intl

Mon 4/5

7:35 p.m.-7:05 a.m.

1 stop8h 30m

C$ 462

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 12/5

8:00 p.m.-9:40 a.m.

1 stop16h 40m

Seattle/Tacoma Intl

Tue 19/5

10:30 a.m.-12:25 a.m.

2 stops10h 55m

C$ 464

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 26/4

8:00 p.m.-9:40 a.m.

1 stop16h 40m

Seattle/Tacoma Intl

Sun 3/5

10:30 a.m.-12:25 a.m.

2 stops10h 55m

C$ 471

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 12/5

7:20 p.m.-6:45 p.m.

2 stops26h 25m

Seattle/Tacoma Intl

Tue 19/5

10:30 a.m.-12:25 a.m.

2 stops10h 55m

C$ 473

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 3/6

6:45 a.m.-6:45 p.m.

2 stops15h 00m

Seattle/Tacoma Intl

Wed 10/6

10:30 a.m.-11:45 p.m.

1 stop10h 15m

C$ 475

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?

What is the cheapest month to fly to Seattle?

If you aren’t able to travel to Seattle during the month of March, then flying in February is also cheap. Prices for this month can be found on momondo for an average of C$ 653.

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

Our data shows that Wednesday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 626. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 779. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

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$ 658 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$ 569 on momondo.

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

There is only 1 cabin class 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 27% 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 April 2026, prices for Montreal to Seattle flights are approximately 14% 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

Fastest flight time

8h 42m

Direct flights

None
The fastest flight from Montreal to Seattle takes 8h 42m
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?

    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 8h 42m.

  • 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
American AirlinesPriceFrom C$ 259Free CancellationRating
7.1
11,567 reviews
Search American Airlines flights
DeltaPriceFrom C$ 281Free CancellationRating
7.9
8,406 reviews
Search Delta flights
WestJetPriceFrom C$ 362Free CancellationRating
7.2
3,320 reviews
Search WestJet flights
United AirlinesPriceFrom C$ 466Free CancellationRating
7.4
9,579 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 495Free CancellationRating
7.1
10,916 reviews
Search Air Canada flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Lynnwood
Leavenworth
SeaTac
Redmond
Marysville
Kirkland
Woodinville
Tacoma
Puyallup
Tukwila
Olympia
Ocean Shores
Ellensburg
Bainbridge Island
Gig Harbor
Renton
Kent
Centralia
Edmonds
Federal Way

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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