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Cheap flights from Montreal to Seattle from C$ 234

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 3/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
7:15 a.m. - 9:40 a.m.
YUL
-
SEA
29h 25m
1 stop
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
C$ 350WestJet
Wed, 13 May - Sat, 23 May
WestJet Logo
6:45 a.m. - 2:19 p.m.
YUL
-
SEA
34h 34m
2 stops
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
C$ 352WestJet
Thu, 5 Mar - Fri, 5 Jun
WestJet Logo
8:00 p.m. - 9:40 a.m.
YUL
-
SEA
16h 40m
1 stop
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
C$ 353WestJet
Thu, 7 May - Sun, 10 May
WestJet Logo
7:15 a.m. - 6:45 p.m.
YUL
-
SEA
14h 30m
1 stop
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
C$ 354WestJet
Fri, 8 May - Sun, 17 May
WestJet Logo
6:45 a.m. - 6:45 p.m.
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
C$ 360WestJet
Wed, 13 May - Sat, 23 May
WestJet Logo
6:45 a.m. - 6:45 p.m.
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
C$ 362WestJet
Fri, 8 May - Sun, 17 May
WestJet Logo
7:30 p.m. - 2:19 p.m.
YUL
-
SEA
21h 49m
1 stop
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
C$ 380WestJet
Tue, 3 Mar - Thu, 4 Jun
WestJet Logo
6:45 a.m. - 2:19 p.m.
YUL
-
SEA
34h 34m
2 stops
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
C$ 384WestJet
Wed, 4 Mar - Thu, 4 Jun
WestJet Logo
7:25 p.m. - 6:45 p.m.
YUL
-
SEA
26h 20m
2 stops
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
C$ 387WestJet
Thu, 7 May - Sun, 10 May
WestJet Logo
7:30 p.m. - 2:19 p.m.
YUL
-
SEA
21h 49m
1 stop
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
C$ 390WestJet
Tue, 3 Mar - Wed, 3 Jun

United Airlines flights from Montreal to Seattle

Our best United Airlines deals on Montreal to Seattle flight tickets
United Airlines
10 Feb
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
17h 15m
2 stops
SEA9:15 p.m.Seattle/Tacoma Intl
24 Feb
SEA7:29 p.m.Seattle/Tacoma Intl
15h 31m
2 stops
YUL2:00 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 589
United Airlines
12 Feb
YUL5:25 p.m.Montreal Pierre Elliott Trudeau Intl
8h 34m
1 stop
SEA10:59 p.m.Seattle/Tacoma Intl
23 Feb
SEA7:29 p.m.Seattle/Tacoma Intl
11h 51m
2 stops
YUL10:20 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 673

WestJet flights from Montreal to Seattle

Our best WestJet deals on Montreal to Seattle flight tickets
WestJet
13 May
YUL7:15 a.m.Montreal Pierre Elliott Trudeau Intl
29h 25m
1 stop
SEA9:40 a.m.Seattle/Tacoma Intl
23 May
SEA7:35 p.m.Seattle/Tacoma Intl
8h 25m
1 stop
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 350
WestJet
5 Mar
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
34h 34m
2 stops
SEA2:19 p.m.Seattle/Tacoma Intl
5 Jun
SEA7:35 p.m.Seattle/Tacoma Intl
8h 25m
1 stop
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 352
WestJet
7 May
YUL8:00 p.m.Montreal Pierre Elliott Trudeau Intl
16h 40m
1 stop
SEA9:40 a.m.Seattle/Tacoma Intl
10 May
SEA7:35 p.m.Seattle/Tacoma Intl
8h 25m
1 stop
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 353

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 29 January 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

Wed 13/5

7:15 a.m.-9:40 a.m.

1 stop29h 25m

Seattle/Tacoma Intl

Sat 23/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

C$ 350

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 5/3

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

2 stops34h 34m

Seattle/Tacoma Intl

Fri 5/6

7:35 p.m.-7:00 a.m.

1 stop8h 25m

C$ 352

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 7/5

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

1 stop16h 40m

Seattle/Tacoma Intl

Sun 10/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

C$ 353

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 8/5

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

1 stop14h 30m

Seattle/Tacoma Intl

Sun 17/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

C$ 354

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 13/5

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

2 stops15h 00m

Seattle/Tacoma Intl

Sat 23/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

C$ 360

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 8/5

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

2 stops15h 00m

Seattle/Tacoma Intl

Sun 17/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

C$ 362

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 3/3

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

1 stop21h 49m

Seattle/Tacoma Intl

Thu 4/6

7:35 p.m.-7:00 a.m.

1 stop8h 25m

C$ 380

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 4/3

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

2 stops34h 34m

Seattle/Tacoma Intl

Thu 4/6

7:35 p.m.-7:00 a.m.

1 stop8h 25m

C$ 384

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 7/5

7:25 p.m.-6:45 p.m.

2 stops26h 20m

Seattle/Tacoma Intl

Sun 10/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

C$ 387

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 3/3

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

1 stop21h 49m

Seattle/Tacoma Intl

Wed 3/6

7:35 p.m.-7:00 a.m.

1 stop8h 25m

C$ 390

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 February, then flying in August is also cheap. Prices for this month can be found on momondo for an average of C$ 652.

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$ 656. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around C$ 735. 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$ 636 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$ 489 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 January 2026, prices for Montreal to Seattle flights are approximately 26% 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

Best price found

C$ 621

Fastest flight time

5h 52m

Direct flights

Mon, Tue, Thu, Fri, Sat and Sun

Airports in Seattle

1 airport
The best flight deal from Montreal to Seattle found on momondo in the last 72 hours is C$ 621
The fastest flight from Montreal to Seattle takes 5h 52m
Direct flights go from Montreal to Seattle on Monday, Tuesday, 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
American AirlinesPriceFrom C$ 254Free CancellationRating
7.2
11,206 reviews
Search American Airlines flights
DeltaPriceFrom C$ 276Free CancellationRating
7.9
8,127 reviews
Search Delta flights
WestJetPriceFrom C$ 351Free CancellationRating
7.2
3,253 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 488Free CancellationRating
7.1
10,667 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 508Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights

Travelling to a place near Seattle?

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

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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