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Cheap flights from Seattle to Montreal from C$ 161

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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
11 Jan — 18 Jan1
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 12 December 2025.

Sat 27/1211:10 p.m.SEA - YUL
1 stop14h 17mMultiple Airlines
Sun 4/17:30 p.m.YUL - SEA
2 stops40h 24mMultiple Airlines
Deal found 11/12C$ 958
Tue 23/128:00 p.m.SEA - YUL
1 stop7h 44mAir Canada
Sat 10/11:15 p.m.YUL - SEA
2 stops11h 51mAir Canada
Deal found 11/12C$ 1,078
Fri 26/125:50 a.m.SEA - YUL
1 stop8h 10mAir Canada
Fri 2/17:30 a.m.YUL - SEA
1 stop17h 36mAir Canada
Deal found 11/12C$ 1,092
Sat 13/1212:48 p.m.SEA - YUL
2 stops32h 42mMultiple Airlines
Tue 16/125:10 p.m.YUL - SEA
1 stop9h 09mMultiple Airlines
Deal found 10/12C$ 1,134
Thu 11/123:10 p.m.SEA - YUL
1 stop12h 55mWestJet
Thu 18/127:30 p.m.YUL - SEA
1 stop21h 50mWestJet
Deal found 10/12C$ 1,225
Wed 17/125:50 a.m.SEA - YUL
1 stop8h 10mAir Canada
Tue 23/123:10 p.m.YUL - SEA
1 stop10h 06mAir Canada
Deal found 9/12C$ 1,233
Mon 29/128:05 a.m.SEA - YUL
1 stop20h 00mMultiple Airlines
Sat 3/17:20 p.m.YUL - SEA
2 stops41h 51mMultiple Airlines
Deal found 10/12C$ 1,245
Wed 10/127:34 p.m.SEA - YUL
1 stop18h 15mUnited Airlines
Wed 24/125:25 p.m.YUL - SEA
1 stop19h 30mUnited Airlines
Deal found 10/12C$ 1,248
Wed 24/1211:10 p.m.SEA - YUL
1 stop14h 17mMultiple Airlines
Sat 3/17:20 p.m.YUL - SEA
2 stops40h 34mMultiple Airlines
Deal found 10/12C$ 1,251

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 12 December 2025.

Round-trip from

C$ 379

One-way from

C$ 161

Popular in

February

Cheapest in

September

Average price

C$ 1,026
WestJet
  • WestJet
  • 11/1-20/1
  • 2 total stops
  • 38h 00m total
  • Seattle to Montreal
Search Deals
WestJet
  • WestJet
  • 2/3
  • 1 total stop
  • 21h 03m total
  • Seattle to Montreal
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 188 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 12 December 2025.
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

Thu 8/1

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

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Thu 15/1

6:45 a.m.-7:17 p.m.

1 stop15h 32m

C$ 499

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 11/2

7:55 a.m.-12:38 a.m.

1 stop13h 43m

Montreal Pierre Elliott Trudeau Intl

Sun 15/2

6:45 a.m.-7:18 p.m.

1 stop15h 33m

C$ 550

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 14/1

3:39 p.m.-7:05 a.m.

2 stops12h 26m

Montreal Pierre Elliott Trudeau Intl

Mon 19/1

7:30 p.m.-7:52 p.m.

1 stop27h 22m

C$ 554

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 2/2

3:40 p.m.-7:10 a.m.

2 stops12h 30m

Montreal Pierre Elliott Trudeau Intl

Tue 3/2

10:10 a.m.-7:16 p.m.

2 stops12h 06m

C$ 563

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 2/2

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

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Tue 3/2

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

1 stop21h 49m

C$ 567

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 20/3

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

2 stops16h 10m

Montreal Pierre Elliott Trudeau Intl

Wed 25/3

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

2 stops34h 34m

C$ 574

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 8/2

5:50 a.m.-7:14 p.m.

2 stops10h 24m

Montreal Pierre Elliott Trudeau Intl

Fri 13/2

7:30 a.m.-2:31 p.m.

1 stop10h 01m

C$ 581

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 14/1

9:55 a.m.-8:55 p.m.

1 stop8h 00m

Montreal Pierre Elliott Trudeau Intl

Mon 19/1

4:10 p.m.-10:16 p.m.

1 stop9h 06m

C$ 582

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 27/5

7:05 a.m.-12:42 a.m.

1 stop14h 37m

Montreal Pierre Elliott Trudeau Intl

Sun 31/5

8:30 a.m.-8:28 p.m.

2 stops14h 58m

C$ 585

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 16/1

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

2 stops9h 35m

Montreal Pierre Elliott Trudeau Intl

Tue 20/1

1:25 p.m.-7:16 p.m.

1 stop8h 51m

C$ 589

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 22 results
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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 5 December 2025.

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$ 292). Flying from Seattle to Montreal in December is currently the most expensive (average of C$ 798). 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.

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 50% 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$ 626.

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: 7h 36m.

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.

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 12 December 2025.
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
10,516 reviews
Check prices

Boarding

7.3

Overall

7.1

Comfort

7.1

Crew

7.8

Food

6.3

Entertainment

6.8

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
10,516 reviews
Air Canada
7.1
Good
10,516 reviews
Check prices

Boarding

7.3

Overall

7.1

Comfort

7.1

Crew

7.8

Food

6.3

Entertainment

6.8

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?

    Air Canada and WestJet can get you from Seattle to Montreal in just under 12h 30m. Your travel time can differ by up to 25m. 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$ 211), Air Canada (C$ 237), and United Airlines (C$ 329).

  • 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$ 292). Flying from Seattle to Montreal in December is currently the most expensive (average of C$ 798). 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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Why should you use Cheapflights to find cheap flight tickets from Seattle to Montreal?

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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