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Cheap flights from Seattle to Montreal from C$ 145

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 29/4. 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.
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
WestJet Logo
5:30 p.m. - 9:40 a.m.
YUL
-
SEA
19h 10m
1 stop
C$ 386WestJet
Sun, 17 May - Wed, 20 May
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
WestJet Logo
8:00 p.m. - 9:40 a.m.
YUL
-
SEA
16h 40m
1 stop
C$ 388WestJet
Thu, 30 Apr - Sun, 3 May
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
WestJet Logo
8:00 p.m. - 9:40 a.m.
YUL
-
SEA
16h 40m
1 stop
C$ 390WestJet
Thu, 7 May - Tue, 12 May
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
WestJet Logo
7:15 a.m. - 6:45 p.m.
YUL
-
SEA
14h 30m
1 stop
C$ 391WestJet
Sat, 2 May - Wed, 6 May
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
WestJet Logo
5:30 p.m. - 9:40 a.m.
YUL
-
SEA
19h 10m
1 stop
C$ 394WestJet
Sun, 17 May - Wed, 20 May
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
WestJet Logo
7:15 a.m. - 6:45 p.m.
YUL
-
SEA
14h 30m
1 stop
C$ 395WestJet
Fri, 1 May - Mon, 4 May
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
WestJet Logo
7:15 a.m. - 6:45 p.m.
YUL
-
SEA
14h 30m
1 stop
C$ 400WestJet
Thu, 30 Apr - Mon, 4 May
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
WestJet Logo
6:45 a.m. - 6:45 p.m.
YUL
-
SEA
15h 00m
2 stops
C$ 402WestJet
Thu, 7 May - Tue, 12 May
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
WestJet Logo
7:25 p.m. - 9:40 a.m.
YUL
-
SEA
17h 15m
2 stops
C$ 403WestJet
Thu, 30 Apr - Mon, 4 May
WestJet Logo
7:35 p.m. - 7:00 a.m.
SEA
-
YUL
8h 25m
1 stop
WestJet Logo
8:00 p.m. - 9:40 a.m.
YUL
-
SEA
16h 40m
1 stop
C$ 413WestJet
Fri, 22 May - Wed, 27 May

WestJet flights from Seattle to Montreal

Our best WestJet deals on Seattle to Montreal flight tickets
WestJet
17 May
SEA7:35 p.m.Seattle/Tacoma Intl
8h 25m
1 stop
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
20 May
YUL5:30 p.m.Montreal Pierre Elliott Trudeau Intl
19h 10m
1 stop
SEA9:40 a.m.Seattle/Tacoma Intl
C$ 386
WestJet
30 Apr
SEA7:35 p.m.Seattle/Tacoma Intl
8h 25m
1 stop
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
3 May
YUL8:00 p.m.Montreal Pierre Elliott Trudeau Intl
16h 40m
1 stop
SEA9:40 a.m.Seattle/Tacoma Intl
C$ 388
WestJet
7 May
SEA7:35 p.m.Seattle/Tacoma Intl
8h 25m
1 stop
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
12 May
YUL8:00 p.m.Montreal Pierre Elliott Trudeau Intl
16h 40m
1 stop
SEA9:40 a.m.Seattle/Tacoma Intl
C$ 390

Air Canada flights from Seattle to Montreal

Our best Air Canada deals on Seattle to Montreal flight tickets
Air Canada
14 Mar
SEA3:40 p.m.Seattle/Tacoma Intl
12h 33m
2 stops
YUL7:13 a.m.Montreal Pierre Elliott Trudeau Intl
21 Mar
YUL2:25 p.m.Montreal Pierre Elliott Trudeau Intl
11h 31m
2 stops
SEA10:56 p.m.Seattle/Tacoma Intl
C$ 595
Air Canada
22 Feb
SEA5:50 a.m.Seattle/Tacoma Intl
8h 10m
1 stop
YUL5:00 p.m.Montreal Pierre Elliott Trudeau Intl
3 Mar
YUL7:30 a.m.Montreal Pierre Elliott Trudeau Intl
10h 31m
1 stop
SEA3:01 p.m.Seattle/Tacoma Intl
C$ 600
Air Canada
22 Feb
SEA5:50 a.m.Seattle/Tacoma Intl
8h 10m
1 stop
YUL5:00 p.m.Montreal Pierre Elliott Trudeau Intl
3 Mar
YUL8:05 a.m.Montreal Pierre Elliott Trudeau Intl
9h 56m
2 stops
SEA3:01 p.m.Seattle/Tacoma Intl
C$ 604

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 29 January 2026.
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

Sun 17/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Wed 20/5

5:30 p.m.-9:40 a.m.

1 stop19h 10m

C$ 386

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 30/4

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Sun 3/5

8:00 p.m.-9:40 a.m.

1 stop16h 40m

C$ 388

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 7/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Tue 12/5

8:00 p.m.-9:40 a.m.

1 stop16h 40m

C$ 390

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 2/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Wed 6/5

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

1 stop14h 30m

C$ 391

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 17/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Wed 20/5

5:30 p.m.-9:40 a.m.

1 stop19h 10m

C$ 394

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 1/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Mon 4/5

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

1 stop14h 30m

C$ 395

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 30/4

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Mon 4/5

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

1 stop14h 30m

C$ 400

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 7/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Tue 12/5

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

2 stops15h 00m

C$ 402

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 30/4

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Mon 4/5

7:25 p.m.-9:40 a.m.

2 stops17h 15m

C$ 403

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 22/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Wed 27/5

8:00 p.m.-9:40 a.m.

1 stop16h 40m

C$ 413

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$ 654, 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$ 683.

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$ 654. 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$ 1,351.

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$ 804 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$ 478 on momondo.

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

There is only 1 cabin class 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 57% 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 January 2026, prices for Seattle to Montreal flights are approximately 8% more expensive 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 07m

Direct flights

Mon, Tue, Wed, Fri, Sat and Sun

Airports in Montreal

2 airports
The fastest flight from Seattle to Montreal takes 5h 07m
Direct flights go from Seattle to Montreal on Monday, Tuesday, Wednesday, Friday, 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 07m, 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