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Cheap flights from Montreal to Seattle from C$ 194

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 1/4. 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.
Air Canada Logo
2:25 p.m. - 10:06 p.m.
YUL
-
SEA
10h 41m2 stops
Air Canada Logo
5:50 a.m. - 5:00 p.m.
SEA
-
YUL
8h 10m1 stop
C$ 345Air Canada
Sat, 10 Jan - Thu, 15 Jan
Air Canada Logo
4:40 p.m. - 9:51 p.m.
YUL
-
SEA
8h 11m1 stop
Air Canada Logo
5:50 a.m. - 5:05 p.m.
SEA
-
YUL
8h 15m1 stop
C$ 349Air Canada
Sun, 19 Apr - Mon, 20 Apr
Air Canada Logo
2:25 p.m. - 10:06 p.m.
YUL
-
SEA
10h 41m2 stops
Air Canada Logo
5:50 a.m. - 7:14 p.m.
SEA
-
YUL
10h 24m2 stops
C$ 352Air Canada
Sat, 10 Jan - Thu, 15 Jan
WestJet Logo
7:30 p.m. - 2:34 p.m.
YUL
-
SEA
22h 04m1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.
SEA
-
YUL
12h 55m1 stop
C$ 353WestJet
Fri, 3 Apr - Tue, 7 Apr
Air Canada Logo
7:30 a.m. - 2:16 p.m.
YUL
-
SEA
9h 46m1 stop
Air Canada Logo
8:20 a.m. - 4:29 p.m.
SEA
-
YUL
5h 09mdirect
C$ 360Air Canada
Fri, 29 May - Sat, 30 May
WestJet Logo
6:45 a.m. - 1:08 p.m.
YUL
-
SEA
33h 23m2 stops
WestJet Logo
7:05 a.m. - 12:42 a.m.
SEA
-
YUL
14h 37m1 stop
C$ 371WestJet
Fri, 8 May - Sat, 16 May
WestJet Logo
6:45 a.m. - 1:08 p.m.
YUL
-
SEA
33h 23m2 stops
WestJet Logo
7:05 a.m. - 12:40 a.m.
SEA
-
YUL
14h 35m2 stops
C$ 373WestJet
Fri, 8 May - Sat, 16 May
Air Canada Logo
4:10 p.m. - 10:16 p.m.
YUL
-
SEA
9h 06m1 stop
Air Canada Logo
8:10 a.m. - 7:22 p.m.
SEA
-
YUL
8h 12m1 stop
C$ 377Air Canada
Sun, 18 Jan - Sat, 24 Jan
Air Canada Logo
10:10 a.m. - 10:16 p.m.
YUL
-
SEA
15h 06m1 stop
Air Canada Logo
5:50 a.m. - 5:00 p.m.
SEA
-
YUL
8h 10m1 stop
C$ 380Air Canada
Sat, 10 Jan - Thu, 15 Jan
WestJet Logo
6:45 a.m. - 8:28 p.m.
YUL
-
SEA
16h 43m1 stop
WestJet Logo
2:05 p.m. - 4:27 p.m.
SEA
-
YUL
23h 22m1 stop
C$ 381WestJet
Fri, 8 May - Sat, 16 May

Delta flights from Montreal to Seattle

Our best Delta deals on Montreal to Seattle flight tickets
Delta
16 Dec
YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl
11h 45m
1 stop
SEA2:45 p.m.Seattle/Tacoma Intl
13 Jan
SEA10:55 p.m.Seattle/Tacoma Intl
11h 37m
1 stop
YUL1:32 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 479
Find similar
Delta
16 Dec
YUL6:00 a.m.Montreal Pierre Elliott Trudeau Intl
11h 45m
1 stop
SEA2:45 p.m.Seattle/Tacoma Intl
17 Jan
SEA11:55 a.m.Seattle/Tacoma Intl
8h 55m
1 stop
YUL11:50 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 505
Find similar
Delta
9 Dec
YUL12:40 p.m.Montreal Pierre Elliott Trudeau Intl
14h 18m
1 stop
SEA11:58 p.m.Seattle/Tacoma Intl
16 Dec
SEA11:50 a.m.Seattle/Tacoma Intl
8h 42m
1 stop
YUL11:32 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 705
Find similar

WestJet flights from Montreal to Seattle

Our best WestJet deals on Montreal to Seattle flight tickets
WestJet
3 Apr
YUL7:30 p.m.Montreal Pierre Elliott Trudeau Intl
22h 04m
1 stop
SEA2:34 p.m.Seattle/Tacoma Intl
7 Apr
SEA3:10 p.m.Seattle/Tacoma Intl
12h 55m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 353
Find similar
WestJet
8 May
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
33h 23m
2 stops
SEA1:08 p.m.Seattle/Tacoma Intl
16 May
SEA7:05 a.m.Seattle/Tacoma Intl
14h 37m
1 stop
YUL12:42 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 371
Find similar
WestJet
8 May
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
33h 23m
2 stops
SEA1:08 p.m.Seattle/Tacoma Intl
16 May
SEA7:05 a.m.Seattle/Tacoma Intl
14h 35m
2 stops
YUL12:40 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 373
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 4 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

Sat 10/1

2:25 p.m.-10:06 p.m.

2 stops10h 41m

Seattle/Tacoma Intl

Thu 15/1

5:50 a.m.-5:00 p.m.

1 stop8h 10m

C$ 345

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 19/4

4:40 p.m.-9:51 p.m.

1 stop8h 11m

Seattle/Tacoma Intl

Mon 20/4

5:50 a.m.-5:05 p.m.

1 stop8h 15m

C$ 349

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 10/1

2:25 p.m.-10:06 p.m.

2 stops10h 41m

Seattle/Tacoma Intl

Thu 15/1

5:50 a.m.-7:14 p.m.

2 stops10h 24m

C$ 352

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 3/4

7:30 p.m.-2:34 p.m.

1 stop22h 04m

Seattle/Tacoma Intl

Tue 7/4

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

1 stop12h 55m

C$ 353

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 29/5

7:30 a.m.-2:16 p.m.

1 stop9h 46m

Seattle/Tacoma Intl

Sat 30/5

8:20 a.m.-4:29 p.m.

Nonstop5h 09m

C$ 360

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 8/5

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

2 stops33h 23m

Seattle/Tacoma Intl

Sat 16/5

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

1 stop14h 37m

C$ 371

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 8/5

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

2 stops33h 23m

Seattle/Tacoma Intl

Sat 16/5

7:05 a.m.-12:40 a.m.

2 stops14h 35m

C$ 373

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 18/1

4:10 p.m.-10:16 p.m.

1 stop9h 06m

Seattle/Tacoma Intl

Sat 24/1

8:10 a.m.-7:22 p.m.

1 stop8h 12m

C$ 377

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 10/1

10:10 a.m.-10:16 p.m.

1 stop15h 06m

Seattle/Tacoma Intl

Thu 15/1

5:50 a.m.-5:00 p.m.

1 stop8h 10m

C$ 380

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 8/5

6:45 a.m.-8:28 p.m.

1 stop16h 43m

Seattle/Tacoma Intl

Sat 16/5

2:05 p.m.-4:27 p.m.

1 stop23h 22m

C$ 381

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$ 670.

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$ 682. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 785. 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$ 566. Flights at noon are often more expensive with an average ticket price of C$ 763.

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$ 694 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$ 502 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 56m

Direct flights

Thu, Fri, Sat and Sun

Airports in Seattle

1 airport
The fastest flight from Montreal to Seattle takes 5h 56m
Direct flights go from Montreal to Seattle on Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
There is 1 airport near Seattle: 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 56m.

  • 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$ 284Free CancellationRating
7.9
8,011 reviews
Search Delta flights
WestJetPriceFrom C$ 372Free CancellationRating
7.2
3,193 reviews
Search WestJet flights
American AirlinesPriceFrom C$ 461Free CancellationRating
7.2
11,047 reviews
Search American Airlines flights
Air CanadaPriceFrom C$ 503Free CancellationRating
7.1
10,500 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 540Free CancellationRating
7.4
9,066 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
Federal Way
Puyallup
Shelton

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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