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Cheap flights from Seattle to Montreal from C$ 182

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 19/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
27 Nov — 4 Dec1
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 65 days in advance, depart on a Friday or Thursday and return on a Friday

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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 28 October 2025.

Thu 4/123:10 p.m.SEA - YUL
1 stop12h 55mWestJet
Sun 7/127:30 p.m.YUL - SEA
1 stop21h 50mWestJet
Deal found 27/10C$ 533
Mon 24/113:10 p.m.SEA - YUL
1 stop21h 02mWestJet
Mon 1/127:30 p.m.YUL - SEA
1 stop21h 50mWestJet
Deal found 25/10C$ 538
Fri 12/123:10 p.m.SEA - YUL
1 stop19h 22mMultiple Airlines
Fri 19/122:30 p.m.YUL - SEA
2 stops24h 01mMultiple Airlines
Deal found 28/10C$ 545
Sun 23/117:56 p.m.SEA - YUL
1 stop17h 31mMultiple Airlines
Sun 30/115:25 p.m.YUL - SEA
2 stops23h 55mMultiple Airlines
Deal found 26/10C$ 555
Mon 24/113:10 p.m.SEA - YUL
1 stop19h 22mMultiple Airlines
Mon 1/126:45 a.m.YUL - SEA
2 stops34h 35mMultiple Airlines
Deal found 25/10C$ 559
Tue 18/113:10 p.m.SEA - YUL
1 stop19h 22mMultiple Airlines
Sun 23/116:00 p.m.YUL - SEA
1 stop23h 20mMultiple Airlines
Deal found 26/10C$ 564
Tue 18/113:10 p.m.SEA - YUL
1 stop19h 22mMultiple Airlines
Mon 24/116:45 a.m.YUL - SEA
2 stops10h 35mMultiple Airlines
Deal found 26/10C$ 566
Mon 24/113:10 p.m.SEA - YUL
1 stop19h 22mMultiple Airlines
Sun 30/115:25 p.m.YUL - SEA
2 stops23h 55mMultiple Airlines
Deal found 26/10C$ 568

Cheap 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 28 October 2025.

Round-trip from

C$ 386

One-way from

C$ 182

Popular in

December

Cheapest in

September

Average price

C$ 853
WestJet
  • WestJet
  • 30/1-2/2
  • 2 total stops
  • 34h 44m total
  • Seattle to Montreal
Search Deals
WestJet
  • WestJet
  • 19/4
  • 2 total stops
  • 30h 28m total
  • Seattle to Montreal
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 68 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 28 October 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 11/12

11:10 p.m.-4:27 p.m.

1 stop14h 17m

Montreal Pierre Elliott Trudeau Intl

Thu 18/12

6:45 a.m.-10:11 a.m.

2 stops30h 26m

C$ 575

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 6/12

3:20 p.m.-1:32 p.m.

1 stop19h 12m

Montreal Pierre Elliott Trudeau Intl

Fri 12/12

6:00 p.m.-7:53 p.m.

1 stop28h 53m

C$ 604

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 2/3

11:59 p.m.-2:00 p.m.

1 stop11h 01m

Montreal Pierre Elliott Trudeau Intl

Thu 5/3

6:00 a.m.-6:58 p.m.

1 stop15h 58m

C$ 694

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 26/11

7:15 a.m.-11:42 p.m.

2 stops13h 27m

Montreal Pierre Elliott Trudeau Intl

Wed 3/12

7:10 a.m.-6:26 p.m.

2 stops14h 16m

C$ 708

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 16/11

6:00 a.m.-5:21 p.m.

1 stop8h 21m

Montreal Pierre Elliott Trudeau Intl

Sat 22/11

7:10 a.m.-6:41 p.m.

2 stops14h 31m

C$ 720

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 20/11

11:00 p.m.-11:40 a.m.

1 stop9h 40m

Montreal Pierre Elliott Trudeau Intl

Sun 23/11

7:10 a.m.-3:35 p.m.

2 stops11h 25m

C$ 720

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 19/11

12:05 p.m.-11:42 p.m.

2 stops8h 37m

Montreal Pierre Elliott Trudeau Intl

Mon 24/11

4:45 p.m.-10:23 p.m.

1 stop8h 38m

C$ 720

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 15/11

11:10 p.m.-11:59 a.m.

1 stop9h 49m

Montreal Pierre Elliott Trudeau Intl

Fri 21/11

7:10 a.m.-3:35 p.m.

2 stops11h 25m

C$ 720

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 14/11

9:28 a.m.-11:42 p.m.

1 stop11h 14m

Montreal Pierre Elliott Trudeau Intl

Wed 19/11

7:10 a.m.-9:14 p.m.

2 stops17h 04m

C$ 720

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 15/11

1:49 p.m.-11:42 p.m.

1 stop6h 53m

Montreal Pierre Elliott Trudeau Intl

Wed 19/11

7:10 a.m.-3:35 p.m.

2 stops11h 25m

C$ 720

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/10

Showing 1-10 of 20 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 24 October 2025.

Booking 65 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$ 287). Flying from Seattle to Montreal in November is currently the most expensive (average of C$ 443). 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 is the cheapest time of day to fly from SEA to YMQ?

Find hourly flight availability from Seattle to Montreal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 October 2025.

When flying from Seattle to Montreal, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 71% versus a flight in the morning.

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 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$ 635.

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 28 October 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
10,371 reviews
Check prices

Boarding

7.3

Comfort

7.1

Crew

7.8

Entertainment

6.8

Food

6.3

Overall

7.1

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
10,371 reviews
Air Canada
7.1
Good
10,371 reviews
Check prices

Boarding

7.3

Comfort

7.1

Crew

7.8

Entertainment

6.8

Food

6.3

Overall

7.1

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 1 airline. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.

  • How long is the flight from Seattle to Montreal?

    United Airlines and Delta can get you from Seattle to Montreal in just under 11h 01m. Your travel time can differ by up to 2h 26m. Airlines will cover a distance of 3663 km. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from Seattle to Montreal round-trip?

    Cheapflights users have booked flights from Seattle to Montreal round-trip from C$ 683. Air Canada is 16% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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$ 287). Flying from Seattle to Montreal in November is currently the most expensive (average of C$ 443). 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

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Seattle to Montreal

Discover the top airline that operate flights from Seattle to Montreal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 28 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 683AverageC$ 999FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Montreal?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Seattle to Montreal. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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.

Can Cheapflights notify me if prices for flights from Seattle to Montreal become cheaper?

Of course! You can now track prices for flights from Seattle to Montreal and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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