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Cheap flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport from C$ 184

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 31/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YUL
17 Oct — 24 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Montreal Pierre Elliott Trudeau Intl are usually found in May or June, booked 54 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from Seattle to Pierre Elliott Trudeau Intl

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Pierre Elliott Trudeau Intl (YUL). 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 17 September 2025.

Round-trip from

C$ 502

One-way from

C$ 184

Popular in

April

Cheapest in

May

Average price

C$ 707

Good round-trip deal

C$ 672 or less

Good one-way deal

C$ 294 or less
WestJet
  • WestJet
  • 22/11-29/11
  • 3 total stops
  • 55h 27m total
  • Seattle to Montreal
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31/10
  • 31/10
  • 3 total stops
  • 25h 32m total
  • Seattle to Montreal
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Highest demand for flights based on searches. 0% potential increase in price (C$ 7 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 22 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Montreal Pierre Elliott Trudeau Intl.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Montreal Pierre Elliott Trudeau Intl.
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Find flight deals from Seattle to Pierre Elliott Trudeau Intl

Cheapest flights from Seattle to Pierre Elliott Trudeau Intl
Explore the most affordable flight options available from Seattle to Pierre Elliott Trudeau Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Sat 22/113:20 p.m.SEA - YUL
1 stop20h 52mWestJet
Sat 29/116:45 a.m.YUL - SEA
2 stops34h 35mWestJet
Deal found 17/9C$ 502
Sat 4/102:55 p.m.SEA - YUL
2 stops13h 15mAir Canada
Tue 7/101:30 p.m.YUL - SEA
2 stops12h 01mAir Canada
Deal found 15/9C$ 505
Sat 11/105:31 p.m.SEA - YUL
1 stop11h 45mMultiple Airlines
Tue 14/104:00 p.m.YUL - SEA
1 stop8h 45mMultiple Airlines
Deal found 15/9C$ 506
Thu 2/105:30 a.m.SEA - YUL
2 stops11h 02mAir Canada
Tue 7/105:00 a.m.YUL - SEA
1 stop8h 59mAir Canada
Deal found 15/9C$ 508
Thu 2/1012:00 p.m.SEA - YUL
1 stop9h 40mAir Canada
Sun 12/106:00 a.m.YUL - SEA
1 stop7h 59mAir Canada
Deal found 14/9C$ 509
Fri 3/107:37 p.m.SEA - YUL
2 stops12h 03mUnited Airlines
Tue 7/109:45 a.m.YUL - SEA
1 stop9h 00mUnited Airlines
Deal found 15/9C$ 510
Mon 6/107:37 p.m.SEA - YUL
1 stop9h 39mUnited Airlines
Wed 15/106:30 p.m.YUL - SEA
1 stop9h 29mUnited Airlines
Deal found 16/9C$ 512
Thu 20/113:10 p.m.SEA - YUL
1 stop19h 22mMultiple Airlines
Sun 23/116:45 a.m.YUL - SEA
1 stop15h 32mMultiple Airlines
Deal found 17/9C$ 513
Sun 19/108:40 a.m.SEA - YUL
2 stops36h 47mWestJet
Wed 22/106:45 a.m.YUL - SEA
2 stops39h 36mWestJet
Deal found 16/9C$ 514
Wed 8/1010:00 a.m.SEA - YUL
2 stops11h 40mAir Canada
Sun 12/106:00 a.m.YUL - SEA
1 stop7h 59mAir Canada
Deal found 15/9C$ 516
Wed 1/102:55 p.m.SEA - YUL
2 stops13h 15mAir Canada
Sun 5/108:00 a.m.YUL - SEA
2 stops17h 31mAir Canada
Deal found 14/9C$ 517
Thu 20/113:10 p.m.SEA - YUL
1 stop19h 22mMultiple Airlines
Mon 24/117:25 p.m.YUL - SEA
2 stops21h 55mMultiple Airlines
Deal found 16/9C$ 520

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Pierre Elliott Trudeau Intl 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 17 September 2025.
Use the filters below to find and compare flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport that are best for you.

Fly from

Seattle

Fly to

Pierre Elliott Trudeau Intl

Route

Depart

Return

Price

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 11/10

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

1 stop11h 45m

Montreal Pierre Elliott Trudeau Intl

Tue 14/10

4:00 p.m.-9:45 p.m.

1 stop8h 45m

C$ 506

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 2/10

12:00 p.m.-12:40 a.m.

1 stop9h 40m

Montreal Pierre Elliott Trudeau Intl

Sun 12/10

6:00 a.m.-10:59 a.m.

1 stop7h 59m

C$ 509

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 3/10

7:37 p.m.-10:40 a.m.

2 stops12h 03m

Montreal Pierre Elliott Trudeau Intl

Tue 7/10

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

1 stop9h 00m

C$ 510

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 6/10

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

1 stop9h 39m

Montreal Pierre Elliott Trudeau Intl

Wed 15/10

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

1 stop9h 29m

C$ 512

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 19/11

3:10 p.m.-3:12 p.m.

1 stop21h 02m

Montreal Pierre Elliott Trudeau Intl

Sun 23/11

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

1 stop15h 32m

C$ 514

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 1/10

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

Nonstop5h 13m

Montreal Pierre Elliott Trudeau Intl

Sun 5/10

8:00 a.m.-6:36 p.m.

2 stops13h 36m

C$ 523

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 2/3

10:05 a.m.-9:00 p.m.

1 stop7h 55m

Montreal Pierre Elliott Trudeau Intl

Thu 5/3

7:30 a.m.-3:01 p.m.

1 stop10h 31m

C$ 524

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 29/9

6:35 a.m.-10:06 p.m.

2 stops12h 31m

Montreal Pierre Elliott Trudeau Intl

Tue 30/9

6:15 a.m.-5:53 p.m.

2 stops14h 38m

C$ 531

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 31/10

5:50 a.m.-5:03 p.m.

1 stop8h 13m

Montreal Pierre Elliott Trudeau Intl

Mon 3/11

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

1 stop10h 06m

C$ 532

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 17/1

8:00 a.m.-7:48 p.m.

1 stop8h 48m

Montreal Pierre Elliott Trudeau Intl

Sat 24/1

1:10 p.m.-10:06 p.m.

2 stops11h 56m

C$ 536

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/9

Showing 1-10 of 18 results
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Best time to book a flight from Seattle to Pierre Elliott Trudeau Intl

Have a flexible travel schedule? Discover the best time to fly to Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl Airport

How far ahead should I book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Pierre Elliott Trudeau Intl. Price data was last updated on 12 September 2025.

The price you pay for your flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 54 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?

Currently, October is the cheapest month in which you can book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport (average of C$ 241). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in April is currently the most expensive (average of C$ 316). 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 YUL?

Find hourly flight availability from Seattle to Pierre Elliott Trudeau Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 September 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport as you normally would.

Reviews of airlines servicing Pierre Elliott Trudeau Intl

Get insights into the airlines that provide service to Pierre Elliott Trudeau Intl. 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 Pierre Elliott Trudeau Intl. Reviews last updated 17 September 2025.
Read through reviews of airlines operating flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport, such as Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,000 reviews
Check prices

Entertainment

6.8

Food

6.3

Overall

7.1

Comfort

7.1

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

Entertainment

6.8

Food

6.3

Overall

7.1

Comfort

7.1

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 Pierre Elliott Trudeau Intl. 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 Pierre Elliott Trudeau Intl?

    Seattle/Tacoma Intl (SEA), located 18.4 km from the city centre, is the airport you fly out of when you book flights from Seattle to Montreal Pierre Elliott Trudeau Intl. 1 airline have flights from Seattle/Tacoma Intl to Montreal Pierre Elliott Trudeau Intl on a regular basis. Booking flights from Seattle/Tacoma Intl to Montreal Pierre Elliott Trudeau Intl should not be difficult; the airport handles an average of 2 outbound flights to Montreal Pierre Elliott Trudeau Intl per day.

  • How long is the flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?

    Departing from Seattle to Montreal Pierre Elliott Trudeau Intl Airport will take you 9h 40m. The distance from Seattle to Montreal Pierre Elliott Trudeau Intl Airport is about 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 Pierre Elliott Trudeau Intl Airport round-trip?

    Our cheapest airline available from Seattle to Montreal Pierre Elliott Trudeau Intl Airport is Air Canada. Our recent data shows that you can find tickets from as low as C$ 672 on this airline. Air Canada is 11% 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 Pierre Elliott Trudeau Intl Airport?

    On average you can expect to pay C$ 825 for a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport. The cheapest flight overall is C$ 231 while the most popular route, (Seattle/Tacoma Intl - Montreal Pierre Elliott Trudeau Intl) is currently priced at C$ 393.

  • Can I find deals for flights from Seattle to Pierre Elliott Trudeau Intl that include hotel bookings?

    Yes. In addition to deals on Seattle to Pierre Elliott Trudeau Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Pierre Elliott Trudeau Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Pierre Elliott Trudeau Intl.

  • Can I find deals for business class flights from Seattle to Pierre Elliott Trudeau Intl?

    Yes. Cheapflights offers flight deals from Seattle to Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl Airport?

    Currently, October is the cheapest month in which you can book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport (average of C$ 241). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in April is currently the most expensive (average of C$ 316). 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

Travelling to a place near Montreal Pierre Elliott Trudeau Intl Airport?

Book flights to Montreal Pierre Elliott Trudeau Intl Airport if you plan to visit one of these locations
Laval
Dorval
Sherbrooke
Cornwall
Brossard
Longueuil
Montebello
Trois-Rivières
Drummondville
Saint-Jean-sur-Richelieu
Boucherville
Bromont
North Hatley
Louiseville

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Pierre Elliott Trudeau Intl

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Pierre Elliott Trudeau Intl flights
Pasco to Pierre Elliott Trudeau Intl flights
Walla Walla to Pierre Elliott Trudeau Intl flights

Top airline flying from Seattle to Pierre Elliott Trudeau Intl

Discover the top airline that operate flights from Seattle to Pierre Elliott Trudeau Intl. 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 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 672AverageC$ 983FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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How does Cheapflights help users find flights from Seattle to Pierre Elliott Trudeau Intl?

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Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Pierre Elliott Trudeau Intl flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Seattle to Pierre Elliott Trudeau Intl become cheaper?

Yes, Cheapflights offers price alerts on Seattle to Pierre Elliott Trudeau Intl flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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