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Cheap flights from Seattle to Montreal from C$ 145

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 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
28 Feb — 7 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Montreal are usually found in September or August, booked 76 days in advance, depart on a Friday or Thursday and return on a Friday

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 29 January 2026.

Sun 17/57:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Wed 20/55:30 p.m.
YUL
-
SEA
1 stop19h 10m
WestJet
Deal found 27/1C$ 386
Thu 30/47:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Sun 3/58:00 p.m.
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 27/1C$ 388
Thu 7/57:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Tue 12/58:00 p.m.
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 27/1C$ 390
Sat 2/57:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Wed 6/57:15 a.m.
YUL
-
SEA
1 stop14h 30m
WestJet
Deal found 27/1C$ 391
Fri 1/57:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Mon 4/57:15 a.m.
YUL
-
SEA
1 stop14h 30m
WestJet
Deal found 27/1C$ 395
Thu 30/47:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Mon 4/57:15 a.m.
YUL
-
SEA
1 stop14h 30m
WestJet
Deal found 27/1C$ 400
Fri 22/57:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Wed 27/58:00 p.m.
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 27/1C$ 413
Fri 29/57:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Mon 1/68:00 p.m.
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 28/1C$ 419

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 29 January 2026.

Round-trip from

C$ 386

One-way from

C$ 145

Popular in

December

Cheapest in

September

Average price

C$ 854
WestJet
  • WestJet
  • 17/5-20/5
  • 2 total stops
  • 27h 35m total
  • Seattle to Montreal
Search Deals
WestJet
  • WestJet
  • 29/4
  • 1 total stop
  • 8h 25m total
  • Seattle to Montreal
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 104 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 29 January 2026.
Use the filters below to find and compare flights from Seattle to Montreal that are best for you.

Fly from

Seattle

Fly to

Montreal

Route

Depart

Return

Price

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

Mon 4/5

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

1 stop14h 30m

C$ 400

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

7:25 p.m.-6:45 p.m.

2 stops26h 20m

C$ 424

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

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

2 stops15h 00m

C$ 424

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 23/3

3:10 p.m.-7:05 a.m.

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Wed 25/3

6:45 a.m.-2:19 p.m.

2 stops34h 34m

C$ 464

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 31/3

8:09 a.m.-12:38 a.m.

1 stop13h 29m

Montreal Pierre Elliott Trudeau Intl

Sun 5/4

7:00 a.m.-2:19 p.m.

1 stop10h 19m

C$ 481

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 30/4

7:35 p.m.-6:25 p.m.

2 stops19h 50m

Montreal Pierre Elliott Trudeau Intl

Sun 3/5

12:15 p.m.-9:40 a.m.

2 stops24h 25m

C$ 523

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 23/3

3:10 p.m.-7:05 a.m.

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Wed 25/3

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

1 stop15h 30m

C$ 572

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 23/3

3:10 p.m.-7:05 a.m.

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Fri 27/3

6:45 a.m.-5:39 p.m.

2 stops13h 54m

C$ 588

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 19/5

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

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Mon 25/5

7:25 p.m.-6:45 p.m.

2 stops26h 20m

C$ 597

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 2/3

11:55 a.m.-7:05 a.m.

2 stops16h 10m

Montreal Pierre Elliott Trudeau Intl

Tue 3/3

7:30 p.m.-2:19 p.m.

1 stop21h 49m

C$ 618

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/1

Showing 1-10 of 20 results
1
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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?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Montreal. Price data was last updated on 23 January 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$ 276). Flying from Seattle to Montreal in December is currently the most expensive (average of C$ 766). 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?

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 29 January 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
10,667 reviews
Check prices

Comfort

7.1

Crew

7.8

Boarding

7.3

Overall

7.1

Entertainment

6.8

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Shawna,Sep 2025

DCA - YYZ

Business class cabin was *freezing*. Landing was so hard it injured my back - no apology or explanation given
Air Canada
7.1
Good
10,667 reviews
Air Canada
7.1
Good
10,667 reviews
Check prices

Comfort

7.1

Crew

7.8

Boarding

7.3

Overall

7.1

Entertainment

6.8

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Shawna,Sep 2025

DCA - YYZ

Business class cabin was *freezing*. Landing was so hard it injured my back - no apology or explanation given

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 25m. 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$ 161), Air Canada (C$ 233), and United Airlines (C$ 324).

  • 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$ 276). Flying from Seattle to Montreal in December is currently the most expensive (average of C$ 766). 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.

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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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