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Cheap flights from Seattle to Montreal from C$ 166

SEA — YMQ
17 Oct — 24 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Montreal

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Montreal

Tue 20/107:35 p.m. -
1 stop8h 30m
Fri 23/106:45 a.m. -
2 stops15h 00m
Deal found 15/9C$ 421
Sat 17/107:35 p.m. -
1 stop8h 30m
Wed 21/106:45 a.m. -
2 stops15h 00m
Deal found 14/9C$ 427
Fri 16/107:35 p.m. -
1 stop8h 30m
Tue 20/108:00 p.m. -
1 stop16h 40m
Deal found 16/9C$ 432
Fri 16/107:35 p.m. -
1 stop8h 30m
Wed 21/106:45 a.m. -
2 stops15h 00m
Deal found 16/9C$ 438
Sat 17/107:35 p.m. -
1 stop8h 30m
Tue 20/108:00 p.m. -
1 stop16h 40m
Deal found 16/9C$ 442
Tue 20/107:35 p.m. -
1 stop8h 30m
Wed 28/106:45 a.m. -
2 stops10h 55m
Deal found 12/9C$ 443
Sun 18/107:35 p.m. -
1 stop8h 30m
Tue 20/108:00 p.m. -
1 stop16h 40m
Deal found 13/9C$ 448
Mon 19/107:35 p.m. -
1 stop8h 30m
Fri 23/106:45 a.m. -
2 stops15h 00m
Deal found 13/9C$ 449
Sat 17/107:35 p.m. -
1 stop8h 30m
Thu 22/107:15 a.m. -
1 stop14h 30m
Deal found 14/9C$ 450

Find flight deals from Seattle to Montreal

Round-trip from

C$ 421

One-way from

C$ 166

Popular in

June

Cheapest in

March

Average price

C$ 690
WestJet
  • WestJet
  • 20/10-23/10
  • 3 total stops
  • 23h 30m total
  • Seattle to Montreal
Search Deals
WestJet
  • WestJet
  • 22/10-31/12
  • 1 total stop
  • 8h 30m total
  • Seattle to Montreal
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 216 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
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 Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Fri 30/10

11:10 p.m.-11:57 a.m.

1 stop9h 47m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 238
Quickest round-trip

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Sat 31/10

1:42 p.m.-11:22 p.m.

1 stop6h 40m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 238

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Sun 1/11

8:25 a.m.-11:22 p.m.

1 stop11h 57m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 238

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Fri 26/2

6:00 a.m.-3:59 p.m.

1 stop6h 59m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 275

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Tue 19/1

6:00 a.m.-3:59 p.m.

1 stop6h 59m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 275

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Fri 6/11

11:34 p.m.-3:28 p.m.

2 stops12h 54m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 282

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Sat 12/12

7:30 p.m.-1:28 p.m.

2 stops14h 58m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 303

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Thu 5/11

10:10 a.m.-8:30 p.m.

1 stop7h 20m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 305

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Sun 1/11

8:40 a.m.-7:35 p.m.

1 stop7h 55m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 305

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Tue 13/10

7:35 p.m.-2:12 p.m.

1 stop15h 37m

Montreal Pierre Elliott Trudeau Intl

Tue 20/10

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

1 stop16h 40m

C$ 537

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/9

Showing 1-10 of 20 resultsSorted by cheapest first
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Best time to book a flight from Seattle to Montreal

Have a flexible travel schedule? Discover the best time to fly to Montreal from Seattle with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Seattle to Montreal

What is the cheapest month to book a flight from Seattle to Montreal?

Currently, March is the cheapest month in which you can book a flight from Seattle to Montreal (average of C$ 651). Flying from Seattle to Montreal in December is currently the most expensive (average of C$ 1,149). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Seattle to Montreal?

Airfare is below average for this route at the moment.
Seattle to Montreal flights typically cost between C$ 522 and C$ 862 in October.
The cheapest round-trip price found within the last 5 days was C$ 421 on WestJet (20 Oct-23 Oct).

How far ahead should I book a flight from Seattle to Montreal?

Booking 55 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Montreal. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Related info for your journey

  • What airport do you fly from for flights from Seattle to Montreal?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Montreal. On average, Seattle/Tacoma Intl has 0 outbound flights to Montreal per day from 0 airlines. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.

  • How long is the flight from Seattle to Montreal?

    Delta and United Airlines can get you from Seattle to Montreal in just under 11h 13m. Your travel time can differ by up to 3h 37m. Airlines will cover a distance of 3663 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Seattle to Montreal one-way?

    The cheapest airlines for a one-way flight from Seattle to Montreal are WestJet (C$ 135), Air Canada (C$ 289), and United Airlines (C$ 298).

  • Can I find deals for flights from Seattle to Montreal that include hotel bookings?

    Yes. In addition to deals on Seattle to Montreal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Montreal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Montreal.

  • Can I find deals for business class flights from Seattle to Montreal?

    Yes. Cheapflights offers flight deals from Seattle to Montreal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Montreal?

    Currently, March is the cheapest month in which you can book a flight from Seattle to Montreal (average of C$ 651). Flying from Seattle to Montreal in December is currently the most expensive (average of C$ 1,149). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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