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Cheap flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport from C$ 176

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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YUL
12 Mar — 19 Mar1
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 18 days in advance, depart on a Friday or Thursday 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 10 February 2026.

Mon 2/33:10 p.m.
SEA
-
YUL
1 stop12h 55m
WestJet
Mon 9/37:30 p.m.
YUL
-
SEA
1 stop21h 49m
WestJet
Deal found 9/2C$ 426
Tue 28/47:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Sun 3/58:00 p.m.
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 9/2C$ 427
Thu 28/57:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Mon 1/68:00 p.m.
YUL
-
SEA
1 stop25h 45m
WestJet
Deal found 10/2C$ 432
Wed 4/33:10 p.m.
SEA
-
YUL
1 stop12h 55m
WestJet
Mon 9/37:30 p.m.
YUL
-
SEA
1 stop21h 49m
WestJet
Deal found 9/2C$ 442
Fri 29/57:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Mon 1/68:00 p.m.
YUL
-
SEA
1 stop16h 40m
WestJet
Deal found 8/2C$ 444
Tue 5/57:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Tue 12/57:15 a.m.
YUL
-
SEA
1 stop14h 30m
WestJet
Deal found 8/2C$ 461
Thu 14/57:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Sun 17/57:15 a.m.
YUL
-
SEA
1 stop14h 30m
WestJet
Deal found 6/2C$ 464

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 10 February 2026.

Round-trip from

C$ 426

One-way from

C$ 176

Popular in

January

Cheapest in

May

Average price

C$ 817
WestJet
  • WestJet
  • 2/3-9/3
  • 2 total stops
  • 34h 44m total
  • Seattle to Montreal
Search Deals
WestJet
  • WestJet
  • 4/5
  • 1 total stop
  • 8h 30m total
  • Seattle to Montreal
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (C$ 319 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 63 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 10 February 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

Seattle

Fly to

Pierre Elliott Trudeau Intl

Route

Depart

Return

Price

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 2/3

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

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Mon 9/3

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

1 stop21h 49m

C$ 426

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 4/3

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

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Mon 9/3

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

1 stop21h 49m

C$ 442

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 14/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Sun 17/5

7:15 a.m.-6:45 p.m.

1 stop14h 30m

C$ 464

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 4/5

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Mon 18/5

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

1 stop16h 40m

C$ 467

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 29/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Mon 1/6

7:25 p.m.-6:45 p.m.

2 stops26h 20m

C$ 471

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 22/5

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Wed 27/5

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

1 stop16h 40m

C$ 494

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 12/6

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Fri 19/6

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

1 stop16h 40m

C$ 502

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 13/6

7:35 p.m.-7:00 a.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Tue 16/6

7:15 a.m.-9:00 p.m.

1 stop16h 45m

C$ 505

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 5/5

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

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Tue 12/5

6:45 a.m.-9:40 a.m.

2 stops29h 55m

C$ 517

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 25/3

7:55 a.m.-12:38 a.m.

1 stop13h 43m

Montreal Pierre Elliott Trudeau Intl

Wed 1/4

6:45 a.m.-7:25 p.m.

1 stop15h 40m

C$ 527

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/2

Showing 1-10 of 19 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 6 February 2026.

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 18 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$ 271). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in December is currently the most expensive (average of C$ 768). 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.

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

  • 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$ 151 on WestJet. Other airlines that offer cheap prices include Air Canada from C$ 234 and United Airlines from C$ 312 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, May is the cheapest month in which you can book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport (average of C$ 271). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in December is currently the most expensive (average of C$ 768). 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
Sherbrooke
Cornwall
Brossard
Montebello
Boucherville
Longueuil
Magog
Saint-Jean-sur-Richelieu
Bromont
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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Walla Walla to Pierre Elliott Trudeau Intl flights

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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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