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Cheap flights from Seattle to Montreal from C$ 257

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 22/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to Montreal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
Multiple Airlines Logo
6:00 p.m. - 10:42 p.m.
YUL
-
SEA
7h 42m
1 stop
C$ 566Multiple Airlines
Tue, 13 Oct - Thu, 15 Oct
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
6:45 a.m. - 6:45 p.m.
YUL
-
SEA
15h 00m
2 stops
C$ 569WestJet
Tue, 22 Sep - Wed, 30 Sep
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
6:45 a.m. - 6:45 p.m.
YUL
-
SEA
15h 00m
2 stops
C$ 570WestJet
Wed, 23 Sep - Wed, 30 Sep
Air Canada Logo
3:00 p.m. - 7:10 a.m.
SEA
-
YUL
13h 10m
2 stops
Air Canada Logo
10:40 a.m. - 9:04 p.m.
YUL
-
SEA
13h 24m
2 stops
C$ 572Air Canada
Tue, 13 Oct - Thu, 15 Oct
Air Canada Logo
3:00 p.m. - 7:10 a.m.
SEA
-
YUL
13h 10m
2 stops
Air Canada Logo
2:10 p.m. - 9:04 p.m.
YUL
-
SEA
9h 54m
1 stop
C$ 574Air Canada
Tue, 13 Oct - Thu, 15 Oct
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
6:45 a.m. - 6:45 p.m.
YUL
-
SEA
15h 00m
2 stops
C$ 576WestJet
Wed, 9 Sep - Tue, 29 Sep
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
6:45 a.m. - 6:45 p.m.
YUL
-
SEA
15h 00m
2 stops
C$ 577WestJet
Wed, 9 Sep - Fri, 25 Sep
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
6:45 a.m. - 6:45 p.m.
YUL
-
SEA
15h 00m
2 stops
C$ 579WestJet
Thu, 10 Sep - Fri, 25 Sep
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
7:15 a.m. - 6:45 p.m.
YUL
-
SEA
14h 30m
1 stop
C$ 580WestJet
Sun, 4 Oct - Fri, 9 Oct
Air Canada Logo
3:00 p.m. - 7:10 a.m.
SEA
-
YUL
13h 10m
2 stops
Air Canada Logo
5:30 p.m. - 10:42 p.m.
YUL
-
SEA
8h 12m
1 stop
C$ 582Air Canada
Thu, 13 Aug - Wed, 19 Aug

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American Airlines flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport

Our best American Airlines deals on Seattle to Montreal Pierre Elliott Trudeau Intl Airport flight tickets
American Airlines
11 Aug
SEA11:16 p.m.Seattle/Tacoma Intl
12h 28m
1 stop
YUL2:44 p.m.Montreal Pierre Elliott Trudeau Intl
12 Aug
YUL5:34 p.m.Montreal Pierre Elliott Trudeau Intl
18h 55m
1 stop
SEA9:29 a.m.Seattle/Tacoma Intl
C$ 630
American Airlines
8 Jul
SEA2:09 p.m.Seattle/Tacoma Intl
18h 34m
1 stop
YUL11:43 a.m.Montreal Pierre Elliott Trudeau Intl
14 Jul
YUL1:05 p.m.Montreal Pierre Elliott Trudeau Intl
12h 51m
1 stop
SEA10:56 p.m.Seattle/Tacoma Intl
C$ 671
American Airlines
8 Jul
SEA2:09 p.m.Seattle/Tacoma Intl
18h 34m
1 stop
YUL11:43 a.m.Montreal Pierre Elliott Trudeau Intl
14 Jul
YUL1:05 p.m.Montreal Pierre Elliott Trudeau Intl
11h 30m
1 stop
SEA9:35 p.m.Seattle/Tacoma Intl
C$ 673

WestJet flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport

Our best WestJet deals on Seattle to Montreal Pierre Elliott Trudeau Intl Airport flight tickets
WestJet
22 Sep
SEA7:35 p.m.Seattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
30 Sep
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
C$ 569
WestJet
23 Sep
SEA7:35 p.m.Seattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
30 Sep
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
C$ 570
WestJet
9 Sep
SEA7:35 p.m.Seattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
29 Sep
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
C$ 576

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport 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 26 June 2026.
Use the filters below to find and compare flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 13/10

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Thu 15/10

6:00 p.m.-10:42 p.m.

1 stop7h 42m

C$ 566

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 22/9

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Wed 30/9

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

2 stops15h 00m

C$ 569

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 23/9

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Wed 30/9

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

2 stops15h 00m

C$ 570

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 13/10

3:00 p.m.-7:10 a.m.

2 stops13h 10m

Montreal Pierre Elliott Trudeau Intl

Thu 15/10

10:40 a.m.-9:04 p.m.

2 stops13h 24m

C$ 572

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 13/10

3:00 p.m.-7:10 a.m.

2 stops13h 10m

Montreal Pierre Elliott Trudeau Intl

Thu 15/10

2:10 p.m.-9:04 p.m.

1 stop9h 54m

C$ 574

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 9/9

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Tue 29/9

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

2 stops15h 00m

C$ 576

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 9/9

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Fri 25/9

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

2 stops15h 00m

C$ 577

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 10/9

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Fri 25/9

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

2 stops15h 00m

C$ 579

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 4/10

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Fri 9/10

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

1 stop14h 30m

C$ 580

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 13/8

3:00 p.m.-7:10 a.m.

2 stops13h 10m

Montreal Pierre Elliott Trudeau Intl

Wed 19/8

5:30 p.m.-10:42 p.m.

1 stop8h 12m

C$ 582

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 Pierre Elliott Trudeau Intl Airport

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 Pierre Elliott Trudeau Intl Airport?

What is the cheapest month to fly to Montreal Pierre Elliott Trudeau Intl Airport?

The month of October is, on average, the cheapest month to fly to Montreal Pierre Elliott Trudeau Intl Airport from Seattle, with most prices found around C$ 721. The month of August is another great option to travel to Montreal Pierre Elliott Trudeau Intl Airport, with average flight prices from Seattle averaging around C$ 836.

What is the cheapest day to depart on your flight to Montreal Pierre Elliott Trudeau Intl Airport?

The cheapest day to depart on your flight to Montreal Pierre Elliott Trudeau Intl Airport is on a Sunday when prices can be found for as low as C$ 914. This is often the case because there is less demand to fly during this day of the week. On the other hand, Wednesday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 1,713.

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

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

How far in advance should I book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?

You are more likely to see cheaper flights to Montreal Pierre Elliott Trudeau Intl Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Montreal Pierre Elliott Trudeau Intl Airport for around C$ 1,022 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Montreal Pierre Elliott Trudeau Intl Airport from Seattle for as low as C$ 390 on momondo.

What cabin class options are available on Seattle to Montreal Pierre Elliott Trudeau Intl Airport flights?

There is only 1 cabin class available to choose from on Seattle to Montreal Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl Airport flights?

You could potentially save up to 47% on your flight if you consider stops on a Seattle to Montreal Pierre Elliott Trudeau Intl Airport flight.

How have Seattle to Montreal Pierre Elliott Trudeau Intl Airport flight prices changed over time?

As of June 2026, prices for Seattle to Montreal Pierre Elliott Trudeau Intl Airport flights are approximately 33% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport

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

Cheap Seattle to Montreal Pierre Elliott Trudeau Intl Airport (SEA to YUL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport

Fastest flight time

7h 21m

Direct flights

None
The fastest flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport takes 7h 21m
There are no direct flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport. There are no popular flight routes from Seattle to Montreal Pierre Elliott Trudeau Intl Airport.
Search flight deals

Frequently asked questions about flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport

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

    A flight from Seattle/Tacoma Intl to Montreal Pierre Elliott Trudeau Intl will travel around 3660.5 km. Flights usually cover this in 7h 21m, 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 Pierre Elliott Trudeau Intl Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Montreal Pierre Elliott Trudeau Intl Airport are updated daily.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Montreal Pierre Elliott Trudeau Intl Airport.

  • What documentation or ID do you need to fly to Montreal Pierre Elliott Trudeau Intl Airport?

    The travel and health documents required for your trip to Montreal Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl Airport. 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 Pierre Elliott Trudeau Intl Airport?

Travelling to a place near Montreal?

Book flights to Montreal if you plan to visit one of these locations
Laval
Trois-Rivières
Sherbrooke
Brossard
Montebello
Dorval
Longueuil
Cornwall
Boucherville
North Hatley
Drummondville
Saint-Sauveur
Magog
Bromont
Saint-Jean-sur-Richelieu
Sutton
Waterloo

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Montreal for you.

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

Yes. momondo allows you to filter the results for Seattle to Montreal flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to Montreal?

Once you have performed a search for Seattle to Montreal flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Seattle to Montreal now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Montreal and let you know when they change.

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