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Cheap flights from Montreal to Seattle from C$ 208

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 15/3. 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 p.m. - 2:19 p.m.
YUL
-
SEA
21h 49m1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.
SEA
-
YUL
12h 55m1 stop
C$ 354WestJet
Tue, 3 Feb - Tue, 10 Feb
WestJet Logo
7:30 p.m. - 2:19 p.m.
YUL
-
SEA
21h 49m1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.
SEA
-
YUL
12h 55m1 stop
C$ 355WestJet
Sun, 1 Feb - Sun, 8 Feb
WestJet Logo
6:45 a.m. - 2:19 p.m.
YUL
-
SEA
34h 34m2 stops
WestJet Logo
3:10 p.m. - 12:38 a.m.
SEA
-
YUL
30h 28m2 stops
C$ 362WestJet
Tue, 3 Feb - Tue, 10 Feb
WestJet Logo
7:30 p.m. - 2:19 p.m.
YUL
-
SEA
21h 49m1 stop
WestJet Logo
3:10 p.m. - 12:38 a.m.
SEA
-
YUL
30h 28m2 stops
C$ 376WestJet
Sun, 1 Feb - Sun, 8 Feb
WestJet Logo
6:45 a.m. - 2:19 p.m.
YUL
-
SEA
34h 34m2 stops
WestJet Logo
3:10 p.m. - 12:38 a.m.
SEA
-
YUL
30h 28m2 stops
C$ 381WestJet
Sun, 1 Feb - Sun, 8 Feb
WestJet Logo
6:45 a.m. - 2:19 p.m.
YUL
-
SEA
34h 34m2 stops
WestJet Logo
3:10 p.m. - 7:05 a.m.
SEA
-
YUL
12h 55m1 stop
C$ 392WestJet
Mon, 16 Mar - Fri, 20 Mar
Multiple Airlines Logo
2:30 p.m. - 9:36 a.m.
YUL
-
SEA
22h 06m2 stops
Multiple Airlines Logo
11:05 p.m. - 4:27 p.m.
SEA
-
YUL
14h 22m1 stop
C$ 487Multiple Airlines
Thu, 15 Jan - Thu, 29 Jan
Multiple Airlines Logo
6:45 a.m. - 11:39 a.m.
YUL
-
SEA
31h 54m2 stops
Multiple Airlines Logo
11:05 p.m. - 4:27 p.m.
SEA
-
YUL
14h 22m1 stop
C$ 489Multiple Airlines
Fri, 23 Jan - Fri, 30 Jan
Air Canada Logo
9:00 a.m. - 2:31 p.m.
YUL
-
SEA
8h 31m1 stop
Air Canada Logo
9:55 a.m. - 9:00 p.m.
SEA
-
YUL
8h 05m1 stop
C$ 511Air Canada
Thu, 5 Feb - Thu, 12 Feb
Multiple Airlines Logo
7:30 p.m. - 7:15 a.m.
YUL
-
SEA
14h 45m2 stops
Multiple Airlines Logo
3:10 p.m. - 7:05 a.m.
SEA
-
YUL
12h 55m1 stop
C$ 512Multiple Airlines
Mon, 19 Jan - Mon, 26 Jan

Delta flights from Montreal to Seattle

Our best Delta deals on Montreal to Seattle flight tickets
Delta
13 May
YUL12:45 p.m.Montreal Pierre Elliott Trudeau Intl
10h 44m
1 stop
SEA8:29 p.m.Seattle/Tacoma Intl
23 May
SEA9:40 a.m.Seattle/Tacoma Intl
10h 30m
1 stop
YUL11:10 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 592
Find similar
Delta
30 Dec
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
12h 47m
1 stop
SEA4:47 p.m.Seattle/Tacoma Intl
2 Jan
SEA10:55 p.m.Seattle/Tacoma Intl
9h 37m
1 stop
YUL11:32 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 1,169
Find similar
Delta
26 Dec
YUL2:40 p.m.Montreal Pierre Elliott Trudeau Intl
11h 51m
1 stop
SEA11:31 p.m.Seattle/Tacoma Intl
29 Dec
SEA12:55 a.m.Seattle/Tacoma Intl
9h 54m
1 stop
YUL1:49 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 1,199
Find similar

United Airlines flights from Montreal to Seattle

Our best United Airlines deals on Montreal to Seattle flight tickets
United Airlines
24 Jan
YUL4:45 p.m.Montreal Pierre Elliott Trudeau Intl
20h 10m
2 stops
SEA9:55 a.m.Seattle/Tacoma Intl
31 Jan
SEA5:00 a.m.Seattle/Tacoma Intl
13h 17m
2 stops
YUL9:17 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 551
Find similar
United Airlines
15 Jan
YUL2:13 p.m.Montreal Pierre Elliott Trudeau Intl
11h 30m
2 stops
SEA10:43 p.m.Seattle/Tacoma Intl
29 Jan
SEA12:57 p.m.Seattle/Tacoma Intl
21h 31m
2 stops
YUL1:28 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 560
Find similar
United Airlines
4 Feb
YUL5:50 p.m.Montreal Pierre Elliott Trudeau Intl
20h 39m
1 stop
SEA11:29 a.m.Seattle/Tacoma Intl
11 Feb
SEA5:00 a.m.Seattle/Tacoma Intl
8h 58m
1 stop
YUL4:58 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 635
Find similar

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 23 December 2025.
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

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 3/2

7:30 p.m.-2:19 p.m.

1 stop21h 49m

Seattle/Tacoma Intl

Tue 10/2

3:10 p.m.-7:05 a.m.

1 stop12h 55m

C$ 354

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 1/2

7:30 p.m.-2:19 p.m.

1 stop21h 49m

Seattle/Tacoma Intl

Sun 8/2

3:10 p.m.-7:05 a.m.

1 stop12h 55m

C$ 355

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 3/2

6:45 a.m.-2:19 p.m.

2 stops34h 34m

Seattle/Tacoma Intl

Tue 10/2

3:10 p.m.-12:38 a.m.

2 stops30h 28m

C$ 362

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 1/2

7:30 p.m.-2:19 p.m.

1 stop21h 49m

Seattle/Tacoma Intl

Sun 8/2

3:10 p.m.-12:38 a.m.

2 stops30h 28m

C$ 376

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 1/2

6:45 a.m.-2:19 p.m.

2 stops34h 34m

Seattle/Tacoma Intl

Sun 8/2

3:10 p.m.-12:38 a.m.

2 stops30h 28m

C$ 381

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 16/3

6:45 a.m.-2:19 p.m.

2 stops34h 34m

Seattle/Tacoma Intl

Fri 20/3

3:10 p.m.-7:05 a.m.

1 stop12h 55m

C$ 392

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 15/1

2:30 p.m.-9:36 a.m.

2 stops22h 06m

Seattle/Tacoma Intl

Thu 29/1

11:05 p.m.-4:27 p.m.

1 stop14h 22m

C$ 487

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 23/1

6:45 a.m.-11:39 a.m.

2 stops31h 54m

Seattle/Tacoma Intl

Fri 30/1

11:05 p.m.-4:27 p.m.

1 stop14h 22m

C$ 489

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 5/2

9:00 a.m.-2:31 p.m.

1 stop8h 31m

Seattle/Tacoma Intl

Thu 12/2

9:55 a.m.-9:00 p.m.

1 stop8h 05m

C$ 511

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 19/1

7:30 p.m.-7:15 a.m.

2 stops14h 45m

Seattle/Tacoma Intl

Mon 26/1

3:10 p.m.-7:05 a.m.

1 stop12h 55m

C$ 512

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 cheapest month to fly to Seattle?

If you aren’t able to travel to Seattle during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of C$ 661.

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$ 673. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around C$ 738. 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$ 558. Flights at noon are often more expensive with an average ticket price of C$ 753.

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$ 672 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$ 496 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 December 2025, prices for Montreal to Seattle flights are approximately 28% 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

5h 52m

Direct flights

Thu, Fri and Sat

Airports in Seattle

1 airport
The fastest flight from Montreal to Seattle takes 5h 52m
Direct flights go from Montreal to Seattle on Thursday, Friday and Saturday. There are no airlines offering direct flights.
There is 1 airport in Seattle. From Montreal there are direct flights to Seattle/Tacoma Intl (SEA).
Search flight deals

  • 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 52m.

  • 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
DeltaPriceFrom C$ 280Free CancellationRating
7.9
8,013 reviews
Search Delta flights
WestJetPriceFrom C$ 367Free CancellationRating
7.2
3,214 reviews
Search WestJet flights
American AirlinesPriceFrom C$ 454Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights
Air CanadaPriceFrom C$ 496Free CancellationRating
7.1
10,551 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 533Free CancellationRating
7.4
9,106 reviews
Search United Airlines flights

Travelling to a place near Seattle?

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

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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