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Cheap flights from Seattle to Montreal from C$ 199

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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
14 Apr — 21 Apr1
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 77 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 15 March 2026.

Mon 4/57:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Fri 8/56:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 13/3C$ 464
Mon 27/47:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Mon 4/56:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 13/3C$ 465
Wed 13/57:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Wed 20/56:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 12/3C$ 466
Thu 7/57:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Sun 10/56:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 12/3C$ 468
Tue 5/57:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Sat 9/56:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 11/3C$ 469
Mon 25/510:30 a.m.
SEA
-
YUL
2 stops10h 55m
WestJet
Mon 1/66:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 13/3C$ 476
Thu 14/510:30 a.m.
SEA
-
YUL
2 stops10h 55m
WestJet
Sun 17/57:00 a.m.
YUL
-
SEA
2 stops14h 45m
WestJet
Deal found 11/3C$ 479
Tue 2/67:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Tue 16/66:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 13/3C$ 482
Wed 29/47:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Wed 6/56:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 15/3C$ 486
Tue 28/47:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Thu 30/48:00 p.m.
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 13/3C$ 495

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 15 March 2026.

Round-trip from

C$ 464

One-way from

C$ 199

Popular in

December

Cheapest in

March

Average price

C$ 461
WestJet
  • WestJet
  • 4/5-8/5
  • 3 total stops
  • 23h 30m total
  • Seattle to Montreal
Search Deals
4/5
  • 4/5
  • 2 total stops
  • 30h 46m total
  • Seattle to Montreal
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 125 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 15 March 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

Thu 7/5

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Sun 10/5

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

2 stops15h 00m

C$ 468

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 26/4

9:54 p.m.-9:20 a.m.

2 stops32h 26m

Montreal Pierre Elliott Trudeau Intl

Wed 6/5

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

1 stop14h 30m

C$ 589

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 27/5

7:35 p.m.-11:45 p.m.

1 stop25h 10m

Montreal Pierre Elliott Trudeau Intl

Tue 9/6

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

1 stop16h 40m

C$ 670

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 22/5

10:30 a.m.-7:05 a.m.

1 stop17h 35m

Montreal Pierre Elliott Trudeau Intl

Mon 1/6

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

1 stop16h 40m

C$ 696

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 25/4

11:59 p.m.-4:05 p.m.

1 stop13h 06m

Montreal Pierre Elliott Trudeau Intl

Sat 2/5

6:10 a.m.-10:47 p.m.

1 stop19h 37m

C$ 734
Quickest round-trip

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 22/6

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Thu 2/7

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

1 stop14h 30m

C$ 753

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 3/5

10:30 a.m.-7:05 a.m.

1 stop17h 35m

Montreal Pierre Elliott Trudeau Intl

Wed 6/5

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

2 stops15h 00m

C$ 757

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 3/5

11:53 p.m.-2:16 p.m.

1 stop11h 23m

Montreal Pierre Elliott Trudeau Intl

Wed 6/5

1:15 p.m.-10:47 p.m.

1 stop12h 32m

C$ 772

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 13/7

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Sun 26/7

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

1 stop16h 40m

C$ 777

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 7/4

5:30 a.m.-11:13 p.m.

2 stops14h 43m

Montreal Pierre Elliott Trudeau Intl

Tue 14/4

9:30 a.m.-6:28 p.m.

2 stops11h 58m

C$ 808

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

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?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Montreal. Price data was last updated on 13 March 2026.

Booking 76 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$ 270). Flying from Seattle to Montreal in December is currently the most expensive (average of C$ 774). 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.

Reviews of airlines servicing Montreal

Get insights into the airlines that provide service to Montreal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Montreal. Reviews last updated 15 March 2026.
See what other customers who have flown with Air Canada from Seattle to Montreal have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,801 reviews
Check prices

Comfort

7.1

Overall

7.1

Food

6.3

Crew

7.8

Entertainment

6.8

Boarding

7.3

Reviews

1 / 20
8.0
Excellent

Dr vandana,Feb 2026

SFO - YYC

It was good, the lounge facilities can be better with some vegetarian options. Overall good
Air Canada
7.1
Good
10,801 reviews
Air Canada
7.1
Good
10,801 reviews
Check prices

Comfort

7.1

Overall

7.1

Food

6.3

Crew

7.8

Entertainment

6.8

Boarding

7.3

Reviews

1 / 20
8.0
Excellent

Dr vandana,Feb 2026

SFO - YYC

It was good, the lounge facilities can be better with some vegetarian options. Overall good

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 can get you from Seattle to Montreal in just under 8h 30m. Your travel time can differ by up to . Airlines will cover a distance of 3663 km.

  • 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$ 236), and United Airlines (C$ 314).

  • 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$ 270). Flying from Seattle to Montreal in December is currently the most expensive (average of C$ 774). 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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