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Cheap flights from Seattle to Montreal from C$ 177

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Montreal departing on 19/1. 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 Seattle to Montreal

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
2:05 p.m. - 12:42 a.m.SEA-YUL
7h 37m1 stop
WestJet Logo
6:45 a.m. - 1:08 p.m.YUL-SEA
9h 23m1 stop
C$ 313WestJet
Find Deal
Thu, 7 May - Mon, 11 May
WestJet Logo
2:05 p.m. - 12:42 a.m.SEA-YUL
7h 37m1 stop
WestJet Logo
6:45 a.m. - 1:08 p.m.YUL-SEA
9h 23m1 stop
C$ 317WestJet
Find Deal
Thu, 30 Apr - Sun, 3 May
WestJet Logo
2:05 p.m. - 12:42 a.m.SEA-YUL
7h 37m1 stop
WestJet Logo
6:45 a.m. - 1:08 p.m.YUL-SEA
9h 23m1 stop
C$ 320WestJet
Find Deal
Mon, 4 May - Fri, 8 May
WestJet Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
WestJet Logo
7:00 a.m. - 2:19 p.m.YUL-SEA
10h 19m1 stop
C$ 357WestJet
Find Deal
Fri, 27 Mar - Sun, 5 Apr
Air Canada Logo
10:05 a.m. - 11:09 p.m.SEA-YUL
10h 04m2 stops
Air Canada Logo
8:05 a.m. - 2:31 p.m.YUL-SEA
9h 26m2 stops
C$ 373Air Canada
Find Deal
Thu, 4 Dec - Wed, 10 Dec
WestJet Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
WestJet Logo
4:15 p.m. - 2:19 p.m.YUL-SEA
25h 04m1 stop
C$ 387WestJet
Find Deal
Mon, 16 Feb - Mon, 23 Feb
WestJet Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
WestJet Logo
7:30 p.m. - 2:20 p.m.YUL-SEA
21h 50m1 stop
C$ 388WestJet
Find Deal
Fri, 23 Jan - Sun, 25 Jan
WestJet Logo
7:05 a.m. - 12:40 a.m.SEA-YUL
14h 35m2 stops
WestJet Logo
6:45 a.m. - 1:08 p.m.YUL-SEA
9h 23m1 stop
C$ 391WestJet
Find Deal
Mon, 4 May - Fri, 8 May
Air Canada Logo
8:00 p.m. - 6:44 a.m.SEA-YUL
7h 44m1 stop
Air Canada Logo
8:05 a.m. - 2:31 p.m.YUL-SEA
9h 26m2 stops
C$ 392Air Canada
Find Deal
Thu, 4 Dec - Wed, 10 Dec
Air Canada Logo
10:05 a.m. - 9:00 p.m.SEA-YUL
7h 55m1 stop
Air Canada Logo
9:00 a.m. - 2:31 p.m.YUL-SEA
8h 31m1 stop
C$ 398Air Canada
Find Deal
Thu, 4 Dec - Wed, 10 Dec

WestJet flights from Seattle to Montreal

Our best WestJet deals on Seattle to Montreal flight tickets
WestJet
7 May
SEA2:05 p.m.Seattle/Tacoma Intl
7h 37m
1 stop
YUL12:42 a.m.Montreal Pierre Elliott Trudeau Intl
11 May
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
9h 23m
1 stop
SEA1:08 p.m.Seattle/Tacoma Intl
C$ 313
Find similar
WestJet
30 Apr
SEA2:05 p.m.Seattle/Tacoma Intl
7h 37m
1 stop
YUL12:42 a.m.Montreal Pierre Elliott Trudeau Intl
3 May
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
9h 23m
1 stop
SEA1:08 p.m.Seattle/Tacoma Intl
C$ 317
Find similar
WestJet
4 May
SEA2:05 p.m.Seattle/Tacoma Intl
7h 37m
1 stop
YUL12:42 a.m.Montreal Pierre Elliott Trudeau Intl
8 May
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
9h 23m
1 stop
SEA1:08 p.m.Seattle/Tacoma Intl
C$ 320
Find similar

Air Canada flights from Seattle to Montreal

Our best Air Canada deals on Seattle to Montreal flight tickets
Air Canada
4 Dec
SEA10:05 a.m.Seattle/Tacoma Intl
10h 04m
2 stops
YUL11:09 p.m.Montreal Pierre Elliott Trudeau Intl
10 Dec
YUL8:05 a.m.Montreal Pierre Elliott Trudeau Intl
9h 26m
2 stops
SEA2:31 p.m.Seattle/Tacoma Intl
C$ 373
Find similar
Air Canada
4 Dec
SEA8:00 p.m.Seattle/Tacoma Intl
7h 44m
1 stop
YUL6:44 a.m.Montreal Pierre Elliott Trudeau Intl
10 Dec
YUL8:05 a.m.Montreal Pierre Elliott Trudeau Intl
9h 26m
2 stops
SEA2:31 p.m.Seattle/Tacoma Intl
C$ 392
Find similar
Air Canada
4 Dec
SEA10:05 a.m.Seattle/Tacoma Intl
7h 55m
1 stop
YUL9:00 p.m.Montreal Pierre Elliott Trudeau Intl
10 Dec
YUL9:00 a.m.Montreal Pierre Elliott Trudeau Intl
8h 31m
1 stop
SEA2:31 p.m.Seattle/Tacoma Intl
C$ 398
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Montreal 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 November 2025.
Use the filters below to find and compare flights from Seattle to Montreal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 7/5

2:05 p.m.-12:42 a.m.

1 stop7h 37m

Montreal Pierre Elliott Trudeau Intl

Mon 11/5

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

1 stop9h 23m

C$ 313

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 30/4

2:05 p.m.-12:42 a.m.

1 stop7h 37m

Montreal Pierre Elliott Trudeau Intl

Sun 3/5

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

1 stop9h 23m

C$ 317

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 4/5

2:05 p.m.-12:42 a.m.

1 stop7h 37m

Montreal Pierre Elliott Trudeau Intl

Fri 8/5

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

1 stop9h 23m

C$ 320

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 27/3

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

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Sun 5/4

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

1 stop10h 19m

C$ 357

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 4/12

10:05 a.m.-11:09 p.m.

2 stops10h 04m

Montreal Pierre Elliott Trudeau Intl

Wed 10/12

8:05 a.m.-2:31 p.m.

2 stops9h 26m

C$ 373

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 16/2

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

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Mon 23/2

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

1 stop25h 04m

C$ 387

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 23/1

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

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Sun 25/1

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

1 stop21h 50m

C$ 388

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 4/5

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

2 stops14h 35m

Montreal Pierre Elliott Trudeau Intl

Fri 8/5

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

1 stop9h 23m

C$ 391

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 4/12

8:00 p.m.-6:44 a.m.

1 stop7h 44m

Montreal Pierre Elliott Trudeau Intl

Wed 10/12

8:05 a.m.-2:31 p.m.

2 stops9h 26m

C$ 392

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 4/12

10:05 a.m.-9:00 p.m.

1 stop7h 55m

Montreal Pierre Elliott Trudeau Intl

Wed 10/12

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

1 stop8h 31m

C$ 398

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 Montreal from

How to get the cheapest flight ticket from Seattle to Montreal

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 Seattle and Montreal?

What is the cheapest month to fly to Montreal?

The cheapest month to fly to Montreal from Seattle is in September. Flight prices, which tend to average around C$ 676, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Montreal from Seattle during August instead. Flights to Montreal in August, while not as cheap as those in September, still average around C$ 690.

What is the cheapest day to depart on your flight to Montreal?

Our data shows that Friday is the least expensive day to fly to Montreal. Tickets to fly out on this day can be as low as C$ 685. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Montreal for around C$ 1,395.

What is the cheapest time of day to depart on your flight to Montreal?

Our data shows that the cheapest Seattle to Montreal flights are usually those with departure times in the evening. Our users have found flights to Montreal in the evening for as low as C$ 319. Flights in the morning are often more expensive with an average ticket price of C$ 1,063.

What is the cheapest Seattle/Tacoma Intl to Montreal flight route?

Fly from Seattle/Tacoma Intl to Montreal Pierre Elliott Trudeau Intl for the best Seattle/Tacoma Intl - Montreal flight prices

How far in advance should I book a flight to Montreal?

You are more likely to see cheaper flights to Montreal from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Montreal for around C$ 783 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Montreal from Seattle for as low as C$ 554 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to Montreal flights?

There are 2 cabin classes available to choose from on Seattle/Tacoma Intl to Montreal 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 Seattle to Montreal flights?

No. A direct flight is the cheapest option for a flight between Seattle to Montreal.

How have Seattle to Montreal flight prices changed over time?

As of November 2025, prices for Seattle to Montreal flights are approximately 32% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Montreal

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Montreal according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Montreal (SEA to YMQ) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Montreal

Fastest flight time

5h 09m

Direct flights

Tue and Fri

Airports in Montreal

1 airport
The fastest flight from Seattle to Montreal takes 5h 09m
Direct flights go from Seattle to Montreal on Tuesday and Friday. There are no airlines offering direct flights.
There is 1 airport near Montreal: Montreal Pierre Elliott Trudeau Intl (YUL)
Search flight deals

  • How far is Seattle/Tacoma Intl to Montreal by plane?

    The straight-line distance from Seattle/Tacoma Intl to Montreal is 3672.5 km. Flights usually cover this in 7h 37m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Montreal?

    Prices for flights from Seattle/Tacoma Intl Airport to Montreal refresh daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Montreal?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Montreal?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Montreal.

  • What documentation or ID do you need to fly to Montreal?

    The travel and health documents required for your trip to Montreal can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Montreal. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Seattle to Montreal?

  • What is the most popular airline from Seattle to Montreal?

Best airlines flying from Seattle to Montreal

Compare and see reviews for airlines that fly from Seattle to Montreal with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom C$ 685Free CancellationRating
7.1
10,463 reviews
Search Air Canada flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Montreal?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Montreal from Seattle.

Can I find flights from Seattle to Montreal with flexible booking policies on momondo?

Flights from Seattle to Montreal 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 Seattle to Montreal?

momondo provides multiple filters to help you find the best flight to Montreal from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Seattle to Montreal right now. Can momondo alert me if prices change?

Price alerts on flights to Montreal from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Montreal trip

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Find better results for your trip to Canada

Fly into one of these airports located in Montreal

Airports listed have a maximum distance of 15.1 km from Montreal
Montreal St Hubert Airport
Montreal Pierre Elliott Trudeau Intl Airport