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Cheap flights from Seattle to Montreal from C$ 141

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 17/10. 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

United Airlines Logo
3:28 p.m. - 8:16 a.m.SEA-YUL
13h 48m1 stop
United Airlines Logo
9:45 a.m. - 3:45 p.m.YUL-SEA
9h 00m1 stop
C$ 500United Airlines
Find Deal
Thu, 2 Oct - Wed, 22 Oct
Air Canada Logo
5:30 a.m. - 7:32 p.m.SEA-YUL
11h 02m2 stops
Air Canada Logo
7:30 a.m. - 2:16 p.m.YUL-SEA
9h 46m1 stop
C$ 501Air Canada
Find Deal
Wed, 1 Oct - Sat, 25 Oct
Logo
7:55 a.m. - 12:43 a.m.SEA-YUL
13h 48m1 stop
Logo
4:15 p.m. - 2:20 p.m.YUL-SEA
25h 05m1 stop
C$ 502
Find Deal
Mon, 17 Nov - Wed, 19 Nov
Air Canada Logo
10:00 a.m. - 8:50 p.m.SEA-YUL
7h 50m1 stop
Air Canada Logo
3:30 p.m. - 9:45 p.m.YUL-SEA
9h 15m1 stop
C$ 504Air Canada
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Sat, 4 Oct - Fri, 24 Oct
WestJet Logo
8:40 a.m. - 12:27 a.m.SEA-YUL
12h 47m2 stops
WestJet Logo
6:45 a.m. - 12:59 p.m.YUL-SEA
33h 14m2 stops
C$ 507WestJet
Find Deal
Thu, 2 Oct - Fri, 24 Oct
Logo
4:47 p.m. - 10:40 a.m.SEA-YUL
14h 53m1 stop
Logo
6:00 a.m. - 10:59 a.m.YUL-SEA
7h 59m1 stop
C$ 509
Find Deal
Sat, 4 Oct - Sun, 12 Oct
Delta Logo
9:45 p.m. - 1:35 p.m.SEA-YUL
12h 50m1 stop
Delta Logo
12:55 p.m. - 10:03 p.m.YUL-SEA
12h 08m1 stop
C$ 530Delta
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Fri, 3 Oct - Tue, 28 Oct
WestJet Logo
8:40 a.m. - 12:27 a.m.SEA-YUL
36h 47m2 stops
WestJet Logo
6:45 a.m. - 7:21 p.m.YUL-SEA
15h 36m2 stops
C$ 533WestJet
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Sat, 18 Oct - Wed, 22 Oct
American Airlines Logo
11:15 p.m. - 3:18 p.m.SEA-YUL
13h 03m1 stop
American Airlines Logo
7:30 a.m. - 10:09 p.m.YUL-SEA
17h 39m1 stop
C$ 547American Airlines
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Fri, 7 Nov - Sat, 15 Nov
American Airlines Logo
12:34 a.m. - 11:40 a.m.SEA-YUL
8h 06m1 stop
American Airlines Logo
4:00 p.m. - 11:05 p.m.YUL-SEA
10h 05m1 stop
C$ 556American Airlines
Find Deal
Wed, 29 Oct - Thu, 6 Nov

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
2 Oct
SEA8:40 a.m.Seattle/Tacoma Intl
12h 47m
2 stops
YUL12:27 a.m.Montreal Pierre Elliott Trudeau Intl
24 Oct
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
33h 14m
2 stops
SEA12:59 p.m.Seattle/Tacoma Intl
C$ 507
Find similar
WestJet
18 Oct
SEA8:40 a.m.Seattle/Tacoma Intl
36h 47m
2 stops
YUL12:27 a.m.Montreal Pierre Elliott Trudeau Intl
22 Oct
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
15h 36m
2 stops
SEA7:21 p.m.Seattle/Tacoma Intl
C$ 533
Find similar
WestJet
23 Oct
SEA8:40 a.m.Seattle/Tacoma Intl
12h 47m
2 stops
YUL12:27 a.m.Montreal Pierre Elliott Trudeau Intl
26 Oct
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
34h 35m
3 stops
SEA2:20 p.m.Seattle/Tacoma Intl
C$ 548
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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
7 Nov
SEA11:15 p.m.Seattle/Tacoma Intl
13h 03m
1 stop
YUL3:18 p.m.Montreal Pierre Elliott Trudeau Intl
15 Nov
YUL7:30 a.m.Montreal Pierre Elliott Trudeau Intl
17h 39m
1 stop
SEA10:09 p.m.Seattle/Tacoma Intl
C$ 547
Find similar
American Airlines
29 Oct
SEA12:34 a.m.Seattle/Tacoma Intl
8h 06m
1 stop
YUL11:40 a.m.Montreal Pierre Elliott Trudeau Intl
6 Nov
YUL4:00 p.m.Montreal Pierre Elliott Trudeau Intl
10h 05m
1 stop
SEA11:05 p.m.Seattle/Tacoma Intl
C$ 556
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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 15 September 2025.
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

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 2/10

3:28 p.m.-8:16 a.m.

1 stop13h 48m

Montreal Pierre Elliott Trudeau Intl

Wed 22/10

9:45 a.m.-3:45 p.m.

1 stop9h 00m

C$ 500

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 1/10

5:30 a.m.-7:32 p.m.

2 stops11h 02m

Montreal Pierre Elliott Trudeau Intl

Sat 25/10

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

1 stop9h 46m

C$ 501

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 17/11

7:55 a.m.-12:43 a.m.

1 stop13h 48m

Montreal Pierre Elliott Trudeau Intl

Wed 19/11

4:15 p.m.-2:20 p.m.

1 stop25h 05m

C$ 502

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 4/10

10:00 a.m.-8:50 p.m.

1 stop7h 50m

Montreal Pierre Elliott Trudeau Intl

Fri 24/10

3:30 p.m.-9:45 p.m.

1 stop9h 15m

C$ 504

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 2/10

8:40 a.m.-12:27 a.m.

2 stops12h 47m

Montreal Pierre Elliott Trudeau Intl

Fri 24/10

6:45 a.m.-12:59 p.m.

2 stops33h 14m

C$ 507

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 4/10

4:47 p.m.-10:40 a.m.

1 stop14h 53m

Montreal Pierre Elliott Trudeau Intl

Sun 12/10

6:00 a.m.-10:59 a.m.

1 stop7h 59m

C$ 509

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 3/10

9:45 p.m.-1:35 p.m.

1 stop12h 50m

Montreal Pierre Elliott Trudeau Intl

Tue 28/10

12:55 p.m.-10:03 p.m.

1 stop12h 08m

C$ 530

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 18/10

8:40 a.m.-12:27 a.m.

2 stops36h 47m

Montreal Pierre Elliott Trudeau Intl

Wed 22/10

6:45 a.m.-7:21 p.m.

2 stops15h 36m

C$ 533

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 7/11

11:15 p.m.-3:18 p.m.

1 stop13h 03m

Montreal Pierre Elliott Trudeau Intl

Sat 15/11

7:30 a.m.-10:09 p.m.

1 stop17h 39m

C$ 547

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 29/10

12:34 a.m.-11:40 a.m.

1 stop8h 06m

Montreal Pierre Elliott Trudeau Intl

Thu 6/11

4:00 p.m.-11:05 p.m.

1 stop10h 05m

C$ 556

Flights are sorted by cheapest round-trip flights 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 cheapest month to fly to Montreal Pierre Elliott Trudeau Intl Airport?

The month of May is, on average, the cheapest month to fly to Montreal Pierre Elliott Trudeau Intl Airport from Seattle, with most prices found around C$ 556. The month of June is another great option to travel to Montreal Pierre Elliott Trudeau Intl Airport, with average flight prices from Seattle averaging around C$ 642.

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 Friday when prices can be found for as low as C$ 676. This is often the case because there is less demand to fly during this day of the week. On the other hand, Saturday 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$ 1,190.

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 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$ 761 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$ 547 on momondo.

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

There are 2 cabin classes available to choose from on Seattle/Tacoma Intl to Montreal Pierre Elliott Trudeau Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

As of September 2025, prices for Seattle to Montreal Pierre Elliott Trudeau Intl Airport flights are approximately 19% 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

Best price found

C$ 296

Fastest flight time

5h 13m

Direct flights

Tue, Wed, Thu, Fri, Sat and Sun
The best one-way flight to Montreal Pierre Elliott Trudeau Intl Airport from Seattle in the past 72 hours is C$ 296. The best round-trip flight deal from Seattle to Montreal Pierre Elliott Trudeau Intl Airport found on momondo in the last 72 hours is C$ 676.
The fastest flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport takes 5h 13m
Direct flights go from Seattle to Montreal Pierre Elliott Trudeau Intl Airport on Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday. The only airline offering direct flights is Air Canada.
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  • 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 5h 13m, 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 many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Montreal Pierre Elliott Trudeau Intl Airport?

  • 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?

  • What is the most popular airline from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?

Best airlines flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport

Compare and see reviews for airlines that fly from Seattle to Montreal Pierre Elliott Trudeau Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom C$ 676Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights

  • Air Canada Flights From Seattle to Montreal Pierre Elliott Trudeau Intl Airport

    Across 7 Air Canada flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport this week, the average price was C$ 714, with the best Air Canada deals starting from C$ 489 round-trip. 10,000 users have rated Air Canada on momondo, with an average score of 7.1/10.

Travelling to a place near Montreal?

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