Find flights
When to book
Airlines
FAQs

Cheap flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport from C$ 231

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 23/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YUL
26 Nov — 3 Dec1
1 adult
1 adult, Economy, 0 bags

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 27 October 2025.

Round-trip from

C$ 390

One-way from

C$ 231

Popular in

April

Cheapest in

May

Average price

C$ 736
WestJet
  • WestJet
  • 27/2-2/3
  • 2 total stops
  • 37h 59m total
  • Seattle to Montreal
Search Deals
23/11
  • 23/11
  • 1 total stop
  • 14h 17m total
  • Seattle to Montreal
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from Seattle to Pierre Elliott Trudeau Intl

Enter your travel dates to find the best prices.

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 27 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 25/10C$ 537
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$ 539
Sun 23/1111:10 p.m.SEA - YUL
1 stop14h 17mMultiple Airlines
Wed 3/126:45 a.m.YUL - SEA
2 stops30h 21mMultiple Airlines
Deal found 25/10C$ 546
Sun 23/1111:10 p.m.SEA - YUL
1 stop14h 17mMultiple Airlines
Mon 1/126:45 a.m.YUL - SEA
2 stops34h 35mMultiple Airlines
Deal found 25/10C$ 547
Sun 23/1111:10 p.m.SEA - YUL
1 stop14h 17mMultiple Airlines
Tue 2/127:30 p.m.YUL - SEA
1 stop22h 05mMultiple Airlines
Deal found 25/10C$ 549
Sun 23/1111:10 p.m.SEA - YUL
1 stop14h 17mMultiple Airlines
Sun 30/116:00 p.m.YUL - SEA
1 stop23h 20mMultiple Airlines
Deal found 25/10C$ 556
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$ 560
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$ 567
Mon 24/113:10 p.m.SEA - YUL
1 stop19h 22mMultiple Airlines
Wed 3/126:45 a.m.YUL - SEA
2 stops10h 50mMultiple Airlines
Deal found 25/10C$ 568
Thu 27/113:10 p.m.SEA - YUL
1 stop19h 22mMultiple Airlines
Wed 3/126:45 a.m.YUL - SEA
2 stops10h 50mMultiple Airlines
Deal found 25/10C$ 571

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 27 October 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

Sun 1/3

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

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Mon 2/3

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

1 stop21h 49m

C$ 462

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 25/2

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

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Mon 2/3

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

1 stop21h 49m

C$ 462

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 18/2

3:10 p.m.-12:38 a.m.

2 stops30h 28m

Montreal Pierre Elliott Trudeau Intl

Wed 25/2

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

1 stop21h 49m

C$ 470

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 27/2

3:10 p.m.-12:38 a.m.

2 stops30h 28m

Montreal Pierre Elliott Trudeau Intl

Mon 2/3

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

2 stops34h 34m

C$ 505

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 19/1

3:10 p.m.-12:43 a.m.

2 stops30h 33m

Montreal Pierre Elliott Trudeau Intl

Fri 23/1

6:45 a.m.-2:38 p.m.

2 stops34h 53m

C$ 515

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 4/12

3:10 p.m.-12:43 a.m.

2 stops30h 33m

Montreal Pierre Elliott Trudeau Intl

Sun 7/12

7:30 p.m.-2:20 p.m.

1 stop21h 50m

C$ 575

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 25/11

3:10 p.m.-1:32 p.m.

1 stop19h 22m

Montreal Pierre Elliott Trudeau Intl

Sun 30/11

6:00 p.m.-2:20 p.m.

1 stop23h 20m

C$ 610

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 11/12

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

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Mon 15/12

6:45 a.m.-2:20 p.m.

2 stops34h 35m

C$ 614

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.-2:20 p.m.

2 stops34h 35m

C$ 633

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 5/4

3:10 p.m.-3:13 p.m.

1 stop21h 03m

Montreal Pierre Elliott Trudeau Intl

Thu 9/4

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

1 stop21h 49m

C$ 635

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/10

Showing 1-10 of 18 results
1
2

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 24 October 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, May is the cheapest month in which you can book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport (average of C$ 287). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in November is currently the most expensive (average of C$ 444). 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 27 October 2025.

One of the essential ways to save on airfare from Seattle to Montreal Pierre Elliott Trudeau Intl Airport is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 71% on airfare.

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 27 October 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
10,370 reviews
Check prices

Crew

7.8

Entertainment

6.8

Boarding

7.3

Comfort

7.1

Overall

7.1

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
10,370 reviews
Air Canada
7.1
Good
10,370 reviews
Check prices

Crew

7.8

Entertainment

6.8

Boarding

7.3

Comfort

7.1

Overall

7.1

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 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 0 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 12h 55m. The distance from Seattle to Montreal Pierre Elliott Trudeau Intl Airport is about 3663 km.

  • 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$ 684 on this airline. Air Canada is 12% 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 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, May is the cheapest month in which you can book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport (average of C$ 287). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in November is currently the most expensive (average of C$ 444). 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
Cornwall
Sherbrooke
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

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

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
Walla Walla to Pierre Elliott Trudeau Intl flights
Pasco 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 27 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 684AverageC$ 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 Pierre Elliott Trudeau Intl?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Pierre Elliott Trudeau Intl from Seattle today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Seattle to Pierre Elliott Trudeau Intl?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Pierre Elliott Trudeau Intl.

Can Cheapflights find flights from Seattle to Pierre Elliott Trudeau Intl with no change fees?

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.

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.