Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

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.
1 adult

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Early arrival? Instantly customize your results

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Seattle to Montreal

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$ 499United 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$ 500Air 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$ 501
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$ 503Air Canada
Find Deal
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$ 506WestJet
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$ 508
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$ 529Delta
Find Deal
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$ 532WestJet
Find Deal
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$ 546American Airlines
Find Deal
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$ 555American Airlines
Find Deal
Wed, 29 Oct - Thu, 6 Nov

United Airlines flights from Seattle to Montreal

Our best United Airlines deals on Seattle to Montreal flight tickets
United Airlines
2 Oct
SEA3:28 p.m.Seattle/Tacoma Intl
13h 48m
1 stop
YUL8:16 a.m.Montreal Pierre Elliott Trudeau Intl
22 Oct
YUL9:45 a.m.Montreal Pierre Elliott Trudeau Intl
9h 00m
1 stop
SEA3:45 p.m.Seattle/Tacoma Intl
C$ 499
Find similar
United Airlines
11 Oct
SEA7:05 a.m.Seattle/Tacoma Intl
11h 24m
2 stops
YUL9:29 p.m.Montreal Pierre Elliott Trudeau Intl
15 Oct
YUL9:45 a.m.Montreal Pierre Elliott Trudeau Intl
9h 00m
1 stop
SEA3:45 p.m.Seattle/Tacoma Intl
C$ 507
Find similar
United Airlines
3 Oct
SEA5:31 p.m.Seattle/Tacoma Intl
11h 45m
1 stop
YUL8:16 a.m.Montreal Pierre Elliott Trudeau Intl
24 Oct
YUL3:41 p.m.Montreal Pierre Elliott Trudeau Intl
9h 36m
1 stop
SEA10:17 p.m.Seattle/Tacoma Intl
C$ 514
Find similar

WestJet flights from Seattle to Montreal

Our best WestJet deals on Seattle to Montreal 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$ 506
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$ 532
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$ 547
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 16 September 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 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$ 499

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$ 500

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$ 501

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$ 503

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$ 506

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$ 508

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$ 529

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$ 532

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$ 546

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$ 555

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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$ 666, 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$ 680.

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$ 675. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Montreal for around C$ 1,188.

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$ 1,042.

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$ 760 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$ 546 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.

How have Seattle to Montreal flight prices changed over time?

As of September 2025, prices for Seattle to Montreal flights are approximately 17% 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

Best price found

C$ 675

Fastest flight time

5h 13m

Direct flights

Every day

Airports in Montreal

1 airport
The best flight deal from Seattle to Montreal found on momondo in the last 72 hours is C$ 675
The fastest flight from Seattle to Montreal takes 5h 13m
Direct flights go from Seattle to Montreal every day.
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 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?

    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$ 675Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights

  • Air Canada Flights From Seattle to Montreal

    Air Canada flight deals from Seattle to Montreal start from C$ 489 round-trip. Over the 7 Air Canada flights for this route in a normal week, average airfare is usually C$ 714 round-trip - but some users have found much cheaper deals with momondo.

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 16/10
Thu 23/10
By creating a price alert you accept our terms of use and privacy policy.

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