Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Seattle to Montreal from C$ 152

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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
11 Oct — 18 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Montreal are usually found in September or June, booked 65 days in advance, depart on a Friday or Thursday and return on a Wednesday

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 11 September 2025.

Round-trip from

C$ 439

One-way from

C$ 152

Popular in

February

Cheapest in

September

Average price

C$ 694

Good round-trip deal

C$ 1,111 or less
Air Canada
  • Air Canada
  • 25/9-28/9
  • 3 total stops
  • 30h 33m total
  • Seattle to Montreal
Search Deals
WestJet
  • WestJet
  • 7/10
  • 1 total stop
  • 7h 36m total
  • Seattle to Montreal
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 118 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Montreal (YMQ).
Search Deals

Find flight deals from Seattle to Montreal

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 11 September 2025.

Thu 25/98:40 a.m.SEA - YUL
2 stops12h 47mMultiple Airlines
Sun 28/97:30 a.m.YUL - SEA
1 stop17h 46mMultiple Airlines
Deal found 8/9C$ 439
Thu 25/98:40 a.m.SEA - YUL
2 stops12h 47mWestJet
Sun 28/96:45 a.m.YUL - SEA
2 stops40h 44mWestJet
Deal found 8/9C$ 457
Tue 23/97:05 a.m.SEA - YUL
2 stops14h 22mWestJet
Mon 29/96:45 a.m.YUL - SEA
2 stops16h 44mWestJet
Deal found 9/9C$ 461
Fri 26/91:15 p.m.SEA - YUL
2 stops32h 12mWestJet
Mon 29/96:45 a.m.YUL - SEA
2 stops16h 44mWestJet
Deal found 9/9C$ 463
Thu 25/98:40 a.m.SEA - YUL
2 stops12h 47mMultiple Airlines
Wed 1/107:00 a.m.YUL - SEA
1 stop12h 41mMultiple Airlines
Deal found 9/9C$ 475
Thu 25/97:15 a.m.SEA - YUL
Nonstop5h 13mAir Canada
Wed 1/109:15 a.m.YUL - SEA
2 stops12h 21mAir Canada
Deal found 9/9C$ 479
Thu 2/101:50 p.m.SEA - YUL
2 stops31h 37mWestJet
Sun 12/106:45 a.m.YUL - SEA
2 stops40h 44mWestJet
Deal found 8/9C$ 489
Fri 31/103:10 p.m.SEA - YUL
2 stops30h 33mWestJet
Mon 3/116:45 a.m.YUL - SEA
2 stops34h 35mWestJet
Deal found 9/9C$ 492
Wed 24/98:40 a.m.SEA - YUL
2 stops12h 47mWestJet
Mon 29/97:00 a.m.YUL - SEA
1 stop16h 29mWestJet
Deal found 10/9C$ 493

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 11 September 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 25/9

7:15 a.m.-3:28 p.m.

Nonstop5h 13m

Montreal Pierre Elliott Trudeau Intl

Sun 28/9

8:00 a.m.-10:16 p.m.

2 stops17h 16m

C$ 488

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 5/1

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

1 stop11h 01m

Montreal Pierre Elliott Trudeau Intl

Tue 6/1

4:15 p.m.-10:06 p.m.

1 stop8h 51m

C$ 502

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 23/9

5:35 p.m.-8:16 a.m.

1 stop11h 41m

Montreal Pierre Elliott Trudeau Intl

Mon 29/9

4:45 p.m.-7:31 p.m.

Nonstop5h 46m

C$ 532

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 2/10

7:37 p.m.-8:16 a.m.

1 stop9h 39m

Montreal Pierre Elliott Trudeau Intl

Tue 7/10

9:45 a.m.-3:45 p.m.

1 stop9h 00m

C$ 540

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 20/2

8:00 a.m.-8:18 p.m.

1 stop9h 18m

Montreal Pierre Elliott Trudeau Intl

Sun 22/2

3:10 p.m.-10:16 p.m.

1 stop10h 06m

C$ 552

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 26/9

5:26 p.m.-1:09 p.m.

2 stops16h 43m

Montreal Pierre Elliott Trudeau Intl

Tue 30/9

9:45 a.m.-3:45 p.m.

1 stop9h 00m

C$ 553

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 26/9

11:05 p.m.-3:33 p.m.

1 stop13h 28m

Montreal Pierre Elliott Trudeau Intl

Tue 30/9

7:50 a.m.-10:04 p.m.

1 stop17h 14m

C$ 554

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 3/10

5:31 p.m.-8:16 a.m.

1 stop11h 45m

Montreal Pierre Elliott Trudeau Intl

Mon 6/10

6:30 p.m.-12:59 a.m.

1 stop9h 29m

C$ 554

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 17/10

5:30 a.m.-4:36 p.m.

1 stop8h 06m

Montreal Pierre Elliott Trudeau Intl

Sun 19/10

7:30 a.m.-6:36 p.m.

1 stop14h 06m

C$ 560

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 7/10

2:05 p.m.-12:41 a.m.

1 stop7h 36m

C$ 152

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

Showing 1-10 of 20 results
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 29 August 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, October is the cheapest month in which you can book a flight from Seattle to Montreal (average of C$ 241). Flying from Seattle to Montreal in April is currently the most expensive (average of C$ 317). 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 11 September 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.

Weekly flight availability from Seattle to Montreal

Explore weekly flight availability from Seattle to Montreal. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 11 September 2025.

The most flights from SEA to YMQ are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

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$ 629.

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 11 September 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
10,000 reviews
Check prices

Comfort

7.1

Entertainment

6.8

Overall

7.1

Food

6.3

Crew

7.8

Boarding

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2024

TPA - YYZ

The pre boarding was a bit confusing but we got through it.
Air Canada
7.1
Good
10,000 reviews
Air Canada
7.1
Good
10,000 reviews
Check prices

Comfort

7.1

Entertainment

6.8

Overall

7.1

Food

6.3

Crew

7.8

Boarding

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2024

TPA - YYZ

The pre boarding was a bit confusing but we got through it.

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 2 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?

    Air Canada and United Airlines can get you from Seattle to Montreal in just under 5h 13m. Your travel time can differ by up to 4h 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$ 677. Air Canada is 17% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest flights from Seattle to Montreal?

    On average you can expect to pay C$ 1,113 for a flight from Seattle to Montreal. The cheapest flight overall is C$ 677 while the most popular route, (Seattle/Tacoma Intl - Montreal Pierre Elliott Trudeau Intl) is currently priced at C$ 442.

  • 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, October is the cheapest month in which you can book a flight from Seattle to Montreal (average of C$ 241). Flying from Seattle to Montreal in April is currently the most expensive (average of C$ 317). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 677AverageC$ 990FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.