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Cheap flights from Seattle to Montreal from C$ 163

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 16/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
30 May — 6 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Montreal are usually found in March or September, booked 76 days in advance, depart on a Friday or Thursday and return on a Wednesday

Cheap flight deals from Seattle to Montreal

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Montreal
Explore the most affordable flight options available from Seattle to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2026.

Wed 19/87:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Wed 2/96:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 25/4C$ 384
Tue 4/87:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Fri 7/86:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 28/4C$ 386
Tue 11/87:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Tue 18/86:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 29/4C$ 387
Tue 4/87:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Mon 10/86:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 28/4C$ 397
Tue 8/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Tue 29/96:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 26/4C$ 404
Tue 18/87:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Tue 25/88:00 p.m.
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 26/4C$ 405
Thu 10/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Tue 15/96:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 29/4C$ 409
Sat 19/910:30 a.m.
SEA
-
YUL
2 stops10h 55m
WestJet
Mon 28/96:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 25/4C$ 410
Wed 1/77:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Tue 7/76:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 28/4C$ 415
Tue 4/87:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Tue 11/88:00 p.m.
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 28/4C$ 416

Find flight deals from Seattle to Montreal

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Montreal (YMQ). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 30 April 2026.

Round-trip from

C$ 384

One-way from

C$ 163

Popular in

December

Cheapest in

March

Average price

C$ 865
WestJet
  • WestJet
  • 19/8-2/9
  • 3 total stops
  • 23h 30m total
  • Seattle to Montreal
Search Deals
WestJet
  • WestJet
  • 16/7
  • 1 total stop
  • 8h 30m total
  • Seattle to Montreal
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 138 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights 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, Cheapflights users made 629,999 searches. Data last updated 30 April 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 6/10

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Sat 10/10

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

1 stop19h 10m

C$ 707

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 2/8

10:30 a.m.-4:45 p.m.

2 stops27h 15m

Montreal Pierre Elliott Trudeau Intl

Sun 9/8

7:20 p.m.-11:07 p.m.

1 stop30h 47m

C$ 742

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 27/5

9:30 a.m.-11:41 p.m.

2 stops11h 11m

Montreal Pierre Elliott Trudeau Intl

Mon 1/6

5:06 p.m.-6:33 a.m.

2 stops16h 27m

C$ 770

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 27/5

9:30 a.m.-11:41 p.m.

2 stops11h 11m

Montreal Pierre Elliott Trudeau Intl

Tue 2/6

7:10 a.m.-4:35 p.m.

2 stops12h 25m

C$ 770

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 26/5

10:35 a.m.-11:41 p.m.

2 stops10h 06m

Montreal Pierre Elliott Trudeau Intl

Tue 2/6

7:10 a.m.-4:35 p.m.

2 stops12h 25m

C$ 798

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 26/5

9:30 a.m.-11:41 p.m.

2 stops11h 11m

Montreal Pierre Elliott Trudeau Intl

Fri 29/5

12:40 p.m.-6:35 a.m.

2 stops20h 55m

C$ 798

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 30/5

5:00 p.m.-10:40 a.m.

1 stop14h 40m

Montreal Pierre Elliott Trudeau Intl

Tue 2/6

3:25 p.m.-11:44 p.m.

1 stop11h 19m

C$ 799

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 28/5

10:35 a.m.-11:41 p.m.

2 stops10h 06m

Montreal Pierre Elliott Trudeau Intl

Mon 1/6

6:00 a.m.-11:05 a.m.

1 stop8h 05m

C$ 800
Quickest round-trip

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 11/10

8:10 a.m.-7:45 p.m.

1 stop8h 35m

Montreal Pierre Elliott Trudeau Intl

Wed 14/10

2:20 p.m.-8:24 p.m.

1 stop9h 04m

C$ 822

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 26/5

6:25 p.m.-11:59 a.m.

2 stops14h 34m

Montreal Pierre Elliott Trudeau Intl

Thu 28/5

12:49 p.m.-12:12 a.m.

2 stops14h 23m

C$ 825

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/4

Showing 1-10 of 21 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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Booking 73 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.

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

Currently, May is the cheapest month in which you can book a flight from Seattle to Montreal (average of C$ 207). Flying from Seattle to Montreal in November is currently the most expensive (average of C$ 424). 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?

What’s the top layover airport for flights from Seattle to Montreal?

Share of one-stop round-trip flights from Seattle to Montreal chosen by Cheapflights users in the past 12 months, using the same layover each way.

Calgary (YYC) – chosen by Cheapflights users on 75% of one-stop itineraries from Seattle to Montreal on Cheapflights.

What’s the cheapest layover airport for flights from Seattle to Montreal?

Average round-trip fare for 1-stop flights from Seattle to Montreal, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 555.

What’s the fastest layover option from Seattle to Montreal?

Shortest average travel time for 1-stop one-way flights from Seattle to Montreal, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Calgary (YYC) have the shortest average one-way travel time for 1-stop routes: 8h 30m.

Which airport typically offers the quickest layover for flights from Seattle to Montreal?

Average layover duration for 1-stop one-way flights from Seattle to Montreal, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via San Francisco (SFO) offer the fastest connection on this route, with an average layover time of 1h 06m.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Montreal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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?

    WestJet and Delta can get you from Seattle to Montreal in just under 8h 30m. Your travel time can differ by up to 2h 41m. 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$ 152), Air Canada (C$ 235), and United Airlines (C$ 313).

  • 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, May is the cheapest month in which you can book a flight from Seattle to Montreal (average of C$ 207). Flying from Seattle to Montreal in November is currently the most expensive (average of C$ 424). 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.

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By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Montreal from Seattle.

Can Cheapflights find flights from Seattle to Montreal with no change fees?

Need flexible booking options for your flight to Montreal from Seattle? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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