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Cheap flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport from C$ 255

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 18/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YUL
14 Jul — 21 Jul1
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 October or August, booked 76 days in advance, depart on a Thursday or Saturday and return on a Wednesday

Cheap 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 14 June 2026.

Sat 5/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
Multiple Airlines
Sat 12/91:10 p.m.
YUL
-
SEA
2 stops10h 54m
Multiple Airlines
Deal found 12/6C$ 543
Sun 27/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Mon 12/106:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 13/6C$ 561
Sat 29/87:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Mon 7/96:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 10/6C$ 562
Fri 3/77:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Thu 9/76:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 10/6C$ 564
Mon 13/77:35 p.m.
SEA
-
YUL
1 stop8h 30m
Multiple Airlines
Tue 21/710:40 a.m.
YUL
-
SEA
2 stops13h 27m
Multiple Airlines
Deal found 10/6C$ 566
Mon 13/73:00 p.m.
SEA
-
YUL
2 stops13h 10m
Air Canada
Tue 21/710:40 a.m.
YUL
-
SEA
2 stops13h 27m
Air Canada
Deal found 10/6C$ 568
Mon 24/87:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Tue 8/96:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 13/6C$ 571
Sun 13/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Fri 18/96:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 12/6C$ 572
Wed 8/77:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Tue 14/76:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 12/6C$ 573
Wed 30/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Mon 12/106:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 13/6C$ 575
Sun 27/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Wed 7/106:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 13/6C$ 576

Find 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 14 June 2026.

Round-trip from

C$ 543

One-way from

C$ 238

Popular in

January

Cheapest in

October

Average price

C$ 1,060
Air Canada
  • Air Canada
  • 5/9-12/9
  • 3 total stops
  • 19h 24m total
  • Seattle to Montreal
Search Deals
Air Canada
  • Air Canada
  • 16/9
  • 1 total stop
  • 8h 21m total
  • Seattle to Montreal
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 225 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 55 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

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 14 June 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 16/11

11:50 p.m.-5:07 p.m.

1 stop14h 17m

Montreal Pierre Elliott Trudeau Intl

Sun 22/11

10:30 a.m.-8:54 p.m.

2 stops13h 24m

C$ 673
Quickest round-trip

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 27/7

8:15 a.m.-7:45 p.m.

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Tue 4/8

6:00 a.m.-2:16 p.m.

1 stop11h 16m

C$ 698

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 2/8

7:00 a.m.-12:25 a.m.

2 stops14h 25m

Montreal Pierre Elliott Trudeau Intl

Tue 11/8

8:00 p.m.-9:00 p.m.

1 stop28h 00m

C$ 706

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 14/7

7:35 p.m.-7:05 a.m.

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Thu 23/7

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

2 stops15h 00m

C$ 708

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 8/7

7:05 p.m.-10:40 a.m.

2 stops12h 35m

Montreal Pierre Elliott Trudeau Intl

Fri 10/7

6:35 p.m.-1:29 a.m.

1 stop9h 54m

C$ 712

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 15/7

10:30 a.m.-4:45 p.m.

2 stops27h 15m

Montreal Pierre Elliott Trudeau Intl

Sun 19/7

8:00 p.m.-9:40 a.m.

1 stop16h 40m

C$ 716

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 10/7

11:00 p.m.-4:10 p.m.

1 stop14h 10m

Montreal Pierre Elliott Trudeau Intl

Wed 22/7

6:00 a.m.-9:07 p.m.

1 stop18h 07m

C$ 729

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 16/11

3:10 p.m.-12:33 a.m.

2 stops30h 23m

Montreal Pierre Elliott Trudeau Intl

Sun 22/11

6:45 a.m.-1:20 p.m.

2 stops33h 35m

C$ 780

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 26/6

9:45 a.m.-11:28 p.m.

1 stop10h 43m

Montreal Pierre Elliott Trudeau Intl

Sun 12/7

7:00 a.m.-4:49 p.m.

1 stop12h 49m

C$ 794

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 15/7

7:00 a.m.-4:45 p.m.

2 stops30h 45m

Montreal Pierre Elliott Trudeau Intl

Mon 20/7

6:45 a.m.-9:00 p.m.

2 stops17h 15m

C$ 838

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

Showing 1-10 of 22 resultsSorted by cheapest first
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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?

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 74 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$ 698). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in January is currently the most expensive (average of C$ 1,401). 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.

How much does it cost to fly round-trip from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?

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. 0 airlines 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 8h 30m. 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 are the cheapest airlines to fly from Seattle to Montreal Pierre Elliott Trudeau Intl Airport one-way?

    One-way options have recently been found by users for as low as C$ 155 on WestJet. Other airlines that offer cheap prices include Air Canada from C$ 240 and United Airlines from C$ 320 one-way.

  • 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$ 698). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in January is currently the most expensive (average of C$ 1,401). 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
Trois-Rivières
Brossard
Sherbrooke
Cornwall
Longueuil
Montebello
Magog
Boucherville
Bromont
Saint-Jean-sur-Richelieu
Drummondville
North Hatley
Saint-Sauveur
Louiseville

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

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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.

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