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Cheap flights from Montreal to Seattle from C$ 201

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 5/4. 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
7:00 a.m. - 2:19 p.m.
YUL
-
SEA
10h 19m
1 stop
WestJet Logo
3:10 p.m. - 3:13 p.m.
SEA
-
YUL
21h 03m
1 stop
C$ 365WestJet
Sun, 5 Apr - Tue, 14 Apr
WestJet Logo
7:00 a.m. - 2:19 p.m.
YUL
-
SEA
10h 19m
1 stop
WestJet Logo
3:10 p.m. - 12:38 a.m.
SEA
-
YUL
30h 28m
2 stops
C$ 387WestJet
Sun, 5 Apr - Tue, 14 Apr
WestJet Logo
4:15 p.m. - 2:19 p.m.
YUL
-
SEA
25h 04m
1 stop
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 394WestJet
Wed, 22 Apr - Wed, 29 Apr
WestJet Logo
4:15 p.m. - 2:19 p.m.
YUL
-
SEA
25h 04m
1 stop
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 398WestJet
Thu, 23 Apr - Thu, 30 Apr
WestJet Logo
6:45 a.m. - 2:19 p.m.
YUL
-
SEA
34h 34m
2 stops
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 401WestJet
Wed, 22 Apr - Wed, 29 Apr
WestJet Logo
7:30 p.m. - 2:19 p.m.
YUL
-
SEA
21h 49m
1 stop
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 407WestJet
Wed, 8 Apr - Wed, 29 Apr
WestJet Logo
4:15 p.m. - 2:19 p.m.
YUL
-
SEA
25h 04m
1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.
SEA
-
YUL
12h 55m
1 stop
C$ 408WestJet
Tue, 10 Mar - Sun, 15 Mar
WestJet Logo
6:45 a.m. - 2:19 p.m.
YUL
-
SEA
34h 34m
2 stops
WestJet Logo
3:10 p.m. - 7:05 a.m.
SEA
-
YUL
12h 55m
1 stop
C$ 409WestJet
Tue, 10 Mar - Sun, 15 Mar
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$ 413WestJet
Mon, 4 May - Mon, 11 May
WestJet Logo
4:15 p.m. - 2:19 p.m.
YUL
-
SEA
25h 04m
1 stop
WestJet Logo
3:10 p.m. - 3:13 p.m.
SEA
-
YUL
21h 03m
1 stop
C$ 416WestJet
Tue, 14 Apr - Thu, 16 Apr

WestJet flights from Montreal to Seattle

Our best WestJet deals on Montreal to Seattle flight tickets
WestJet
5 Apr
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
10h 19m
1 stop
SEA2:19 p.m.Seattle/Tacoma Intl
14 Apr
SEA3:10 p.m.Seattle/Tacoma Intl
21h 03m
1 stop
YUL3:13 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 365
WestJet
5 Apr
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
10h 19m
1 stop
SEA2:19 p.m.Seattle/Tacoma Intl
14 Apr
SEA3:10 p.m.Seattle/Tacoma Intl
30h 28m
2 stops
YUL12:38 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 387
WestJet
22 Apr
YUL4:15 p.m.Montreal Pierre Elliott Trudeau Intl
25h 04m
1 stop
SEA2:19 p.m.Seattle/Tacoma Intl
29 Apr
SEA7:35 p.m.Seattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 394

Air Canada flights from Montreal to Seattle

Our best Air Canada deals on Montreal to Seattle flight tickets
Air Canada
28 Feb
YUL1:15 p.m.Montreal Pierre Elliott Trudeau Intl
12h 42m
2 stops
SEA10:57 p.m.Seattle/Tacoma Intl
3 Mar
SEA5:40 a.m.Seattle/Tacoma Intl
8h 20m
1 stop
YUL5:00 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 890
Air Canada
28 Feb
YUL1:15 p.m.Montreal Pierre Elliott Trudeau Intl
12h 42m
2 stops
SEA10:57 p.m.Seattle/Tacoma Intl
4 Mar
SEA8:00 a.m.Seattle/Tacoma Intl
9h 45m
2 stops
YUL8:45 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 901
Air Canada
2 Mar
YUL4:10 p.m.Montreal Pierre Elliott Trudeau Intl
9h 06m
1 stop
SEA10:16 p.m.Seattle/Tacoma Intl
6 Mar
SEA8:00 a.m.Seattle/Tacoma Intl
9h 45m
2 stops
YUL8:45 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 913

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 20 February 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

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 5/4

7:00 a.m.-2:19 p.m.

1 stop10h 19m

Seattle/Tacoma Intl

Tue 14/4

3:10 p.m.-3:13 p.m.

1 stop21h 03m

C$ 365

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 5/4

7:00 a.m.-2:19 p.m.

1 stop10h 19m

Seattle/Tacoma Intl

Tue 14/4

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

2 stops30h 28m

C$ 387

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 22/4

4:15 p.m.-2:19 p.m.

1 stop25h 04m

Seattle/Tacoma Intl

Wed 29/4

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

1 stop8h 30m

C$ 394

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 23/4

4:15 p.m.-2:19 p.m.

1 stop25h 04m

Seattle/Tacoma Intl

Thu 30/4

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

1 stop8h 30m

C$ 398

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 22/4

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

2 stops34h 34m

Seattle/Tacoma Intl

Wed 29/4

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

1 stop8h 30m

C$ 401

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 8/4

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

1 stop21h 49m

Seattle/Tacoma Intl

Wed 29/4

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

1 stop8h 30m

C$ 407

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 10/3

4:15 p.m.-2:19 p.m.

1 stop25h 04m

Seattle/Tacoma Intl

Sun 15/3

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

1 stop12h 55m

C$ 408

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 10/3

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

2 stops34h 34m

Seattle/Tacoma Intl

Sun 15/3

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

1 stop12h 55m

C$ 409

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 4/5

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

1 stop16h 40m

Seattle/Tacoma Intl

Mon 11/5

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

1 stop8h 30m

C$ 413

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 14/4

4:15 p.m.-2:19 p.m.

1 stop25h 04m

Seattle/Tacoma Intl

Thu 16/4

3:10 p.m.-3:13 p.m.

1 stop21h 03m

C$ 416

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 February, then flying in August is also cheap. Prices for this month can be found on momondo for an average of C$ 649.

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$ 665. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 725. 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$ 696 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$ 478 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 February 2026, prices for Montreal to Seattle flights are approximately 8% 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

Best price found

C$ 626

Fastest flight time

9h 14m

Direct flights

None
The best flight deal from Montreal to Seattle found on momondo in the last 72 hours is C$ 626
The fastest flight from Montreal to Seattle takes 9h 14m
There are no direct flights from Montreal to Seattle. There are no popular flight routes from Montreal to Seattle.
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 9h 14m.

  • 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$ 256Free CancellationRating
7.2
11,334 reviews
Search American Airlines flights
DeltaPriceFrom C$ 278Free CancellationRating
7.9
8,228 reviews
Search Delta flights
WestJetPriceFrom C$ 354Free CancellationRating
7.2
3,270 reviews
Search WestJet flights
United AirlinesPriceFrom C$ 492Free CancellationRating
7.4
9,335 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 496Free CancellationRating
7.1
10,734 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
Tacoma
Marysville
Redmond
Kirkland
Tukwila
Olympia
Ocean Shores
Bainbridge Island
Ellensburg
Gig Harbor
Renton
Cle Elum
Centralia
Puyallup
Kent
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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