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Cheap flights from Montreal to Seattle from C$ 205

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 16/3. 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
6:45 a.m. - 1:08 p.m.
YUL
-
SEA
9h 23m1 stop
WestJet Logo
7:05 a.m. - 12:42 a.m.
SEA
-
YUL
14h 37m1 stop
C$ 317WestJet
Wed, 20 May - Tue, 2 Jun
WestJet Logo
7:30 p.m. - 2:38 p.m.
YUL
-
SEA
22h 08m1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.
SEA
-
YUL
12h 55m1 stop
C$ 354WestJet
Fri, 23 Jan - Fri, 30 Jan
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$ 357WestJet
Sat, 31 Jan - Wed, 4 Feb
WestJet Logo
7:30 p.m. - 2:20 p.m.
YUL
-
SEA
21h 50m1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.
SEA
-
YUL
12h 55m1 stop
C$ 358WestJet
Thu, 8 Jan - Wed, 14 Jan
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
Sat, 31 Jan - Wed, 4 Feb
WestJet Logo
6:45 a.m. - 2:38 p.m.
YUL
-
SEA
34h 53m2 stops
WestJet Logo
3:10 p.m. - 7:05 a.m.
SEA
-
YUL
12h 55m1 stop
C$ 394WestJet
Fri, 23 Jan - Fri, 30 Jan
WestJet Logo
6:45 a.m. - 1:08 p.m.
YUL
-
SEA
9h 23m1 stop
WestJet Logo
7:05 a.m. - 12:42 a.m.
SEA
-
YUL
14h 37m1 stop
C$ 398WestJet
Fri, 29 May - Sun, 31 May
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$ 408WestJet
Sun, 22 Feb - Wed, 18 Mar
Multiple Airlines Logo
7:30 p.m. - 2:20 p.m.
YUL
-
SEA
21h 50m1 stop
Multiple Airlines Logo
11:24 a.m. - 7:05 a.m.
SEA
-
YUL
16h 41m2 stops
C$ 409Multiple Airlines
Tue, 13 Jan - Tue, 20 Jan
WestJet Logo
6:45 a.m. - 1:08 p.m.
YUL
-
SEA
9h 23m1 stop
WestJet Logo
3:35 p.m. - 6:57 a.m.
SEA
-
YUL
36h 22m2 stops
C$ 431WestJet
Sat, 9 May - Sat, 16 May

WestJet flights from Montreal to Seattle

Our best WestJet deals on Montreal to Seattle flight tickets
WestJet
20 May
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
9h 23m
1 stop
SEA1:08 p.m.Seattle/Tacoma Intl
2 Jun
SEA7:05 a.m.Seattle/Tacoma Intl
14h 37m
1 stop
YUL12:42 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 317
Find similar
WestJet
23 Jan
YUL7:30 p.m.Montreal Pierre Elliott Trudeau Intl
22h 08m
1 stop
SEA2:38 p.m.Seattle/Tacoma Intl
30 Jan
SEA3:10 p.m.Seattle/Tacoma Intl
12h 55m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 354
Find similar
WestJet
31 Jan
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
34h 34m
2 stops
SEA2:19 p.m.Seattle/Tacoma Intl
4 Feb
SEA3:10 p.m.Seattle/Tacoma Intl
12h 55m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 357
Find similar

American Airlines flights from Montreal to Seattle

Our best American Airlines deals on Montreal to Seattle flight tickets
American Airlines
24 Jan
YUL3:50 p.m.Montreal Pierre Elliott Trudeau Intl
9h 30m
1 stop
SEA10:20 p.m.Seattle/Tacoma Intl
31 Jan
SEA8:04 a.m.Seattle/Tacoma Intl
28h 04m
1 stop
YUL3:08 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 482
Find similar
American Airlines
15 Jan
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
15h 04m
1 stop
SEA7:04 p.m.Seattle/Tacoma Intl
20 Jan
SEA12:45 p.m.Seattle/Tacoma Intl
22h 00m
1 stop
YUL1:45 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 486
Find similar
American Airlines
30 Jan
YUL3:50 p.m.Montreal Pierre Elliott Trudeau Intl
9h 30m
1 stop
SEA10:20 p.m.Seattle/Tacoma Intl
6 Feb
SEA12:45 p.m.Seattle/Tacoma Intl
22h 00m
1 stop
YUL1:45 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 488
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 18 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

Wed 20/5

6:45 a.m.-1:08 p.m.

1 stop9h 23m

Seattle/Tacoma Intl

Tue 2/6

7:05 a.m.-12:42 a.m.

1 stop14h 37m

C$ 317

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 23/1

7:30 p.m.-2:38 p.m.

1 stop22h 08m

Seattle/Tacoma Intl

Fri 30/1

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

1 stop12h 55m

C$ 354

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 31/1

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

2 stops34h 34m

Seattle/Tacoma Intl

Wed 4/2

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

1 stop12h 55m

C$ 357

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 8/1

7:30 p.m.-2:20 p.m.

1 stop21h 50m

Seattle/Tacoma Intl

Wed 14/1

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

1 stop12h 55m

C$ 358

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 31/1

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

2 stops34h 34m

Seattle/Tacoma Intl

Wed 4/2

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

2 stops30h 28m

C$ 362

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 23/1

6:45 a.m.-2:38 p.m.

2 stops34h 53m

Seattle/Tacoma Intl

Fri 30/1

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

1 stop12h 55m

C$ 394

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 29/5

6:45 a.m.-1:08 p.m.

1 stop9h 23m

Seattle/Tacoma Intl

Sun 31/5

7:05 a.m.-12:42 a.m.

1 stop14h 37m

C$ 398

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 22/2

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

2 stops34h 34m

Seattle/Tacoma Intl

Wed 18/3

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

1 stop12h 55m

C$ 408

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 13/1

7:30 p.m.-2:20 p.m.

1 stop21h 50m

Seattle/Tacoma Intl

Tue 20/1

11:24 a.m.-7:05 a.m.

2 stops16h 41m

C$ 409

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 9/5

6:45 a.m.-1:08 p.m.

1 stop9h 23m

Seattle/Tacoma Intl

Sat 16/5

3:35 p.m.-6:57 a.m.

2 stops36h 22m

C$ 431

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 Monday 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$ 558. Flights at noon are often more expensive with an average ticket price of C$ 754.

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

Mon, Thu, Fri, Sat and Sun

Airports in Seattle

1 airport
The fastest flight from Montreal to Seattle takes 5h 52m
Direct flights go from Montreal to Seattle on Monday, Thursday, Friday, Saturday and Sunday. 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
8,008 reviews
Search Delta flights
WestJetPriceFrom C$ 367Free CancellationRating
7.2
3,204 reviews
Search WestJet flights
American AirlinesPriceFrom C$ 455Free CancellationRating
7.2
11,055 reviews
Search American Airlines flights
Air CanadaPriceFrom C$ 496Free CancellationRating
7.1
10,534 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 533Free CancellationRating
7.4
9,093 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
Marysville
Tacoma
SeaTac
Kirkland
Tukwila
Olympia
Ocean Shores
Redmond
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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