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Cheap flights from Seattle to Montreal from C$ 172

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 30/6. 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. - 7:05 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$ 427WestJet
Tue, 30 Jun - Thu, 9 Jul
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$ 431WestJet
Sun, 19 Jul - Wed, 29 Jul
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$ 436WestJet
Tue, 30 Jun - Wed, 8 Jul
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$ 440WestJet
Wed, 1 Jul - Tue, 7 Jul
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$ 443WestJet
Sat, 25 Jul - Tue, 28 Jul
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
8:00 p.m. - 9:40 a.m.
YUL
-
SEA
16h 40m
1 stop
C$ 446WestJet
Sun, 19 Jul - Mon, 27 Jul
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$ 450WestJet
Fri, 28 Aug - Mon, 7 Sep
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
8:00 p.m. - 9:40 a.m.
YUL
-
SEA
16h 40m
1 stop
C$ 451WestJet
Tue, 28 Jul - Tue, 4 Aug
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$ 458WestJet
Sun, 19 Jul - Wed, 29 Jul
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$ 459WestJet
Mon, 24 Aug - Mon, 31 Aug

WestJet flights from Seattle to Montreal

Our best WestJet deals on Seattle to Montreal flight tickets
WestJet
30 Jun
SEA7:35 p.m.Seattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
9 Jul
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
C$ 427
WestJet
19 Jul
SEA7:35 p.m.Seattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
26 Jul
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
C$ 431
WestJet
30 Jun
SEA7:35 p.m.Seattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
7 Jul
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
C$ 436

Air Canada flights from Seattle to Montreal

Our best Air Canada deals on Seattle to Montreal flight tickets
Air Canada
24 May
SEA5:50 a.m.Seattle/Tacoma Intl
9h 40m
2 stops
YUL6:30 p.m.Montreal Pierre Elliott Trudeau Intl
28 May
YUL3:40 p.m.Montreal Pierre Elliott Trudeau Intl
8h 28m
1 stop
SEA9:08 p.m.Seattle/Tacoma Intl
C$ 842
Air Canada
25 May
SEA10:45 a.m.Seattle/Tacoma Intl
17h 25m
2 stops
YUL7:10 a.m.Montreal Pierre Elliott Trudeau Intl
26 May
YUL10:35 a.m.Montreal Pierre Elliott Trudeau Intl
13h 33m
2 stops
SEA9:08 p.m.Seattle/Tacoma Intl
C$ 950
Air Canada
25 May
SEA10:45 a.m.Seattle/Tacoma Intl
17h 25m
2 stops
YUL7:10 a.m.Montreal Pierre Elliott Trudeau Intl
26 May
YUL11:10 a.m.Montreal Pierre Elliott Trudeau Intl
12h 58m
1 stop
SEA9:08 p.m.Seattle/Tacoma Intl
C$ 978

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 12 May 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

Cheapest round-trip

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 30/6

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Thu 9/7

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

2 stops15h 00m

C$ 427

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 19/7

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Wed 29/7

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

2 stops15h 00m

C$ 431

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 30/6

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Wed 8/7

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

2 stops15h 00m

C$ 436

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 1/7

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Tue 7/7

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

2 stops15h 00m

C$ 440

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 25/7

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Tue 28/7

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

2 stops15h 00m

C$ 443

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 19/7

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Mon 27/7

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

1 stop16h 40m

C$ 446

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 28/8

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Mon 7/9

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

2 stops15h 00m

C$ 450

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 28/7

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Tue 4/8

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

1 stop16h 40m

C$ 451
Quickest round-trip

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 19/7

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Wed 29/7

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

1 stop14h 30m

C$ 458

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 24/8

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Mon 31/8

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

2 stops15h 00m

C$ 459

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 May. Flight prices, which tend to average around C$ 206, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of May, then book flights to Montreal from Seattle during September instead. Flights to Montreal in September, while not as cheap as those in May, still average around C$ 212.

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$ 668. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Montreal for around C$ 1,647.

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 from Seattle 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$ 948 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$ 369 on momondo.

Can stopping save me money on Seattle to Montreal flights?

You could potentially save up to 50% 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 May 2026, 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

8h 30m

Direct flights

None
The fastest flight from Seattle to Montreal takes 8h 30m
There are no direct flights from Seattle to Montreal. There are no popular flight routes from Seattle to Montreal.
Search flight deals

Frequently asked questions about flying from Seattle to Montreal

  • 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 8h 30m, 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