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Cheap flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport from C$ 257

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 22/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YUL
26 Jul — 2 Aug1
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 Friday or Tuesday 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 26 June 2026.

Tue 13/107:35 p.m.
SEA
-
YUL
1 stop8h 30m
Multiple Airlines
Thu 15/106:00 p.m.
YUL
-
SEA
1 stop7h 42m
Multiple Airlines
Deal found 25/6C$ 566
Tue 22/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Wed 30/96:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 22/6C$ 569
Wed 23/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Wed 30/96:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 22/6C$ 570
Tue 13/103:00 p.m.
SEA
-
YUL
2 stops13h 10m
Air Canada
Thu 15/1010:40 a.m.
YUL
-
SEA
2 stops13h 24m
Air Canada
Deal found 25/6C$ 572
Wed 9/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Tue 29/96:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 25/6C$ 576
Wed 9/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Fri 25/96:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 25/6C$ 577
Thu 10/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Fri 25/96:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Deal found 25/6C$ 579
Sun 4/107:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Fri 9/107:15 a.m.
YUL
-
SEA
1 stop14h 30m
WestJet
Deal found 24/6C$ 580
Thu 13/83:00 p.m.
SEA
-
YUL
2 stops13h 10m
Air Canada
Wed 19/85:30 p.m.
YUL
-
SEA
1 stop8h 12m
Air Canada
Deal found 26/6C$ 582
Thu 13/87:35 p.m.
SEA
-
YUL
1 stop8h 30m
Multiple Airlines
Wed 19/85:30 p.m.
YUL
-
SEA
1 stop8h 12m
Multiple Airlines
Deal found 26/6C$ 584

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 26 June 2026.

Round-trip from

C$ 566

One-way from

C$ 257

Popular in

January

Cheapest in

October

Average price

C$ 1,132
Air Canada
  • Air Canada
  • 13/10-15/10
  • 2 total stops
  • 16h 12m total
  • Seattle to Montreal
Search Deals
WestJet
  • WestJet
  • 22/9
  • 1 total stop
  • 8h 30m total
  • Seattle to Montreal
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 215 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 54 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 26 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

Wed 8/7

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Tue 14/7

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

2 stops15h 00m

C$ 624

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 12/8

10:30 a.m.-12:25 a.m.

2 stops10h 55m

Montreal Pierre Elliott Trudeau Intl

Mon 17/8

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

1 stop16h 40m

C$ 643

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 2/12

3:15 p.m.-7:10 a.m.

2 stops12h 55m

Montreal Pierre Elliott Trudeau Intl

Wed 9/12

9:00 a.m.-2:37 p.m.

1 stop8h 37m

C$ 665

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 19/8

9:10 a.m.-11:52 p.m.

1 stop11h 42m

Montreal Pierre Elliott Trudeau Intl

Sun 23/8

7:00 a.m.-4:44 p.m.

1 stop12h 44m

C$ 690

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 21/8

9:10 a.m.-11:52 p.m.

1 stop11h 42m

Montreal Pierre Elliott Trudeau Intl

Tue 25/8

5:10 p.m.-10:05 p.m.

1 stop7h 55m

C$ 690

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 10/7

7:00 a.m.-11:45 p.m.

1 stop13h 45m

Montreal Pierre Elliott Trudeau Intl

Fri 17/7

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

1 stop28h 00m

C$ 701

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 12/8

9:10 a.m.-11:52 p.m.

1 stop11h 42m

Montreal Pierre Elliott Trudeau Intl

Sun 23/8

7:00 a.m.-4:44 p.m.

1 stop12h 44m

C$ 708
Quickest round-trip

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 9/8

11:11 p.m.-10:40 a.m.

1 stop8h 29m

Montreal Pierre Elliott Trudeau Intl

Sat 22/8

9:45 a.m.-5:42 p.m.

2 stops10h 57m

C$ 722

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 27/7

7:05 p.m.-8:16 a.m.

1 stop10h 11m

Montreal Pierre Elliott Trudeau Intl

Tue 4/8

9:45 a.m.-4:09 p.m.

1 stop9h 24m

C$ 724

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 22/7

7:05 p.m.-8:16 a.m.

1 stop10h 11m

Montreal Pierre Elliott Trudeau Intl

Wed 29/7

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

1 stop18h 07m

C$ 739

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/6

Showing 1-10 of 21 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$ 721). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in January is currently the most expensive (average of C$ 1,425). 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$ 158 on WestJet. Other airlines that offer cheap prices include Air Canada from C$ 244 and United Airlines from C$ 304 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$ 721). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in January is currently the most expensive (average of C$ 1,425). 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
Dorval
Trois-Rivières
Laval
Brossard
Sherbrooke
Longueuil
Cornwall
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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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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