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Cheap flights from Seattle to Montreal from C$ 142

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 15/3. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:02 p.m. - 7:05 a.m.
SEA
-
YUL
31h 03m2 stops
Multiple Airlines Logo
7:30 p.m. - 2:20 p.m.
YUL
-
SEA
21h 50m1 stop
C$ 364Multiple Airlines
Mon, 12 Jan - Wed, 21 Jan
Multiple Airlines Logo
1:11 p.m. - 7:05 a.m.
SEA
-
YUL
14h 54m2 stops
Multiple Airlines Logo
7:30 p.m. - 2:19 p.m.
YUL
-
SEA
21h 49m1 stop
C$ 370Multiple Airlines
Mon, 2 Feb - Mon, 9 Feb
Multiple Airlines Logo
9:02 p.m. - 7:05 a.m.
SEA
-
YUL
31h 03m2 stops
Multiple Airlines Logo
7:30 p.m. - 2:20 p.m.
YUL
-
SEA
21h 50m1 stop
C$ 377Multiple Airlines
Mon, 12 Jan - Wed, 21 Jan
Multiple Airlines Logo
10:05 p.m. - 7:05 a.m.
SEA
-
YUL
30h 00m2 stops
Multiple Airlines Logo
7:30 p.m. - 2:20 p.m.
YUL
-
SEA
21h 50m1 stop
C$ 378Multiple Airlines
Sun, 18 Jan - Wed, 28 Jan
Multiple Airlines Logo
1:11 p.m. - 7:05 a.m.
SEA
-
YUL
14h 54m2 stops
Multiple Airlines Logo
7:30 p.m. - 2:19 p.m.
YUL
-
SEA
21h 49m1 stop
C$ 379Multiple Airlines
Mon, 2 Feb - Mon, 9 Feb
WestJet Logo
3:10 p.m. - 7:05 a.m.
SEA
-
YUL
12h 55m1 stop
WestJet Logo
7:30 p.m. - 2:19 p.m.
YUL
-
SEA
21h 49m1 stop
C$ 381WestJet
Mon, 2 Feb - Mon, 9 Feb
Multiple Airlines Logo
1:11 p.m. - 7:05 a.m.
SEA
-
YUL
14h 54m2 stops
Multiple Airlines Logo
7:30 p.m. - 2:19 p.m.
YUL
-
SEA
21h 49m1 stop
C$ 382Multiple Airlines
Mon, 2 Feb - Mon, 9 Feb
WestJet Logo
7:05 a.m. - 12:42 a.m.
SEA
-
YUL
14h 37m1 stop
WestJet Logo
6:45 a.m. - 8:28 p.m.
YUL
-
SEA
16h 43m1 stop
C$ 386WestJet
Fri, 1 May - Fri, 8 May
WestJet Logo
3:10 p.m. - 7:05 a.m.
SEA
-
YUL
12h 55m1 stop
WestJet Logo
6:45 a.m. - 2:19 p.m.
YUL
-
SEA
34h 34m2 stops
C$ 402WestJet
Sun, 1 Mar - Sun, 8 Mar
WestJet Logo
7:05 a.m. - 12:42 a.m.
SEA
-
YUL
14h 37m1 stop
WestJet Logo
6:45 a.m. - 8:28 p.m.
YUL
-
SEA
16h 43m1 stop
C$ 407WestJet
Fri, 1 May - Mon, 4 May

WestJet flights from Seattle to Montreal

Our best WestJet deals on Seattle to Montreal flight tickets
WestJet
2 Feb
SEA3:10 p.m.Seattle/Tacoma Intl
12h 55m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
9 Feb
YUL7:30 p.m.Montreal Pierre Elliott Trudeau Intl
21h 49m
1 stop
SEA2:19 p.m.Seattle/Tacoma Intl
C$ 381
Find similar
WestJet
1 May
SEA7:05 a.m.Seattle/Tacoma Intl
14h 37m
1 stop
YUL12:42 a.m.Montreal Pierre Elliott Trudeau Intl
8 May
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
16h 43m
1 stop
SEA8:28 p.m.Seattle/Tacoma Intl
C$ 386
Find similar
WestJet
1 Mar
SEA3:10 p.m.Seattle/Tacoma Intl
12h 55m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
8 Mar
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
34h 34m
2 stops
SEA2:19 p.m.Seattle/Tacoma Intl
C$ 402
Find similar

Delta flights from Seattle to Montreal

Our best Delta deals on Seattle to Montreal flight tickets
Delta
23 Dec
SEA8:15 a.m.Seattle/Tacoma Intl
12h 44m
1 stop
YUL11:59 p.m.Montreal Pierre Elliott Trudeau Intl
10 Jan
YUL12:54 p.m.Montreal Pierre Elliott Trudeau Intl
11h 55m
1 stop
SEA9:49 p.m.Seattle/Tacoma Intl
C$ 1,203
Find similar
Delta
25 Dec
SEA12:00 p.m.Seattle/Tacoma Intl
8h 59m
1 stop
YUL11:59 p.m.Montreal Pierre Elliott Trudeau Intl
1 Jan
YUL12:37 p.m.Montreal Pierre Elliott Trudeau Intl
14h 21m
1 stop
SEA11:58 p.m.Seattle/Tacoma Intl
C$ 1,591
Find similar
Delta
23 Dec
SEA7:25 a.m.Seattle/Tacoma Intl
13h 34m
2 stops
YUL11:59 p.m.Montreal Pierre Elliott Trudeau Intl
31 Dec
YUL2:40 p.m.Montreal Pierre Elliott Trudeau Intl
11h 51m
1 stop
SEA11:31 p.m.Seattle/Tacoma Intl
C$ 1,671
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 21 December 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

Mon 12/1

9:02 p.m.-7:05 a.m.

2 stops31h 03m

Montreal Pierre Elliott Trudeau Intl

Wed 21/1

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

1 stop21h 50m

C$ 364

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 2/2

1:11 p.m.-7:05 a.m.

2 stops14h 54m

Montreal Pierre Elliott Trudeau Intl

Mon 9/2

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

1 stop21h 49m

C$ 370

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 12/1

9:02 p.m.-7:05 a.m.

2 stops31h 03m

Montreal Pierre Elliott Trudeau Intl

Wed 21/1

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

1 stop21h 50m

C$ 377

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 18/1

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

2 stops30h 00m

Montreal Pierre Elliott Trudeau Intl

Wed 28/1

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

1 stop21h 50m

C$ 378

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 2/2

1:11 p.m.-7:05 a.m.

2 stops14h 54m

Montreal Pierre Elliott Trudeau Intl

Mon 9/2

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

1 stop21h 49m

C$ 379

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 2/2

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

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Mon 9/2

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

1 stop21h 49m

C$ 381

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 2/2

1:11 p.m.-7:05 a.m.

2 stops14h 54m

Montreal Pierre Elliott Trudeau Intl

Mon 9/2

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

1 stop21h 49m

C$ 382

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 1/5

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

1 stop14h 37m

Montreal Pierre Elliott Trudeau Intl

Fri 8/5

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

1 stop16h 43m

C$ 386

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 1/3

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

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Sun 8/3

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

2 stops34h 34m

C$ 402

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 1/5

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

1 stop14h 37m

Montreal Pierre Elliott Trudeau Intl

Mon 4/5

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

1 stop16h 43m

C$ 407

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 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$ 665, 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$ 679.

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$ 674. 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$ 1,374.

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$ 314. Flights in the morning are often more expensive with an average ticket price of C$ 1,041.

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$ 805 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$ 486 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?

You could potentially save up to 68% on your flight if you consider stops on a Seattle to Montreal flight.

How have Seattle to Montreal flight prices changed over time?

As of December 2025, prices for Seattle to Montreal flights are approximately 25% 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 22m

Direct flights

Tue, Wed, Sat and Sun

Airports in Montreal

2 airports
The fastest flight from Seattle to Montreal takes 5h 22m
Direct flights go from Seattle to Montreal on Tuesday, Wednesday, Saturday and Sunday. There are no airlines offering direct flights.
There are 2 airports in Montreal. From Seattle there are direct flights to 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 5h 22m, 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 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?

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.

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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