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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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YUL
23 Aug — 30 Aug1
1 adult

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 18 August 2025.

Round-trip from

C$ 409

One-way from

C$ 184

Popular in

April

Cheapest in

May

Average price

C$ 800

Good round-trip deal

C$ 691 or less

Good one-way deal

C$ 237 or less
WestJet
  • WestJet
  • 16/9-23/9
  • 2 total stops
  • 16h 35m total
  • Seattle to Montreal
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WestJet
  • WestJet
  • 16/9
  • 1 total stop
  • 7h 36m total
  • Seattle to Montreal
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 1% potential price decrease (C$ 22 potential savings vs. average RT price).
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Average for round-trip flights in August 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 18 August 2025.

Tue 16/92:05 p.m.SEA - YUL
1 stop7h 36mWestJet
Tue 23/97:00 a.m.YUL - SEA
1 stop8h 59mWestJet
Deal found 18/8C$ 409
Wed 17/91:50 p.m.SEA - YUL
1 stop7h 51mWestJet
Tue 23/97:00 a.m.YUL - SEA
1 stop8h 59mWestJet
Deal found 16/8C$ 427
Wed 17/91:50 p.m.SEA - YUL
2 stops21h 19mMultiple Airlines
Tue 23/97:00 a.m.YUL - SEA
1 stop8h 59mMultiple Airlines
Deal found 16/8C$ 437
Mon 15/98:40 a.m.SEA - YUL
1 stop26h 30mMultiple Airlines
Wed 15/107:00 a.m.YUL - SEA
1 stop8h 59mMultiple Airlines
Deal found 16/8C$ 441
Fri 10/101:50 p.m.SEA - YUL
1 stop7h 51mWestJet
Mon 20/107:00 a.m.YUL - SEA
1 stop8h 59mWestJet
Deal found 16/8C$ 442
Thu 4/91:50 p.m.SEA - YUL
1 stop7h 51mWestJet
Wed 10/97:00 a.m.YUL - SEA
1 stop8h 59mWestJet
Deal found 16/8C$ 444
Sat 6/91:50 p.m.SEA - YUL
1 stop7h 51mWestJet
Tue 23/97:00 a.m.YUL - SEA
1 stop8h 59mWestJet
Deal found 16/8C$ 450
Wed 17/91:50 p.m.SEA - YUL
1 stop7h 51mWestJet
Mon 22/97:00 a.m.YUL - SEA
1 stop8h 59mWestJet
Deal found 16/8C$ 455
Wed 17/97:55 a.m.SEA - YUL
1 stop27h 14mMultiple Airlines
Wed 24/96:45 a.m.YUL - SEA
2 stops35h 46mMultiple Airlines
Deal found 16/8C$ 457
Wed 1/101:50 p.m.SEA - YUL
1 stop7h 51mWestJet
Sun 5/107:00 a.m.YUL - SEA
1 stop8h 59mWestJet
Deal found 15/8C$ 461

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 18 August 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

Tue 16/9

2:05 p.m.-12:41 a.m.

1 stop7h 36m

Montreal Pierre Elliott Trudeau Intl

Tue 23/9

7:00 a.m.-12:59 p.m.

1 stop8h 59m

C$ 409

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 17/9

1:50 p.m.-12:41 a.m.

1 stop7h 51m

Montreal Pierre Elliott Trudeau Intl

Tue 23/9

7:00 a.m.-12:59 p.m.

1 stop8h 59m

C$ 427

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 17/9

1:50 p.m.-2:09 p.m.

2 stops21h 19m

Montreal Pierre Elliott Trudeau Intl

Tue 23/9

7:00 a.m.-12:59 p.m.

1 stop8h 59m

C$ 437

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 15/9

8:40 a.m.-2:10 p.m.

1 stop26h 30m

Montreal Pierre Elliott Trudeau Intl

Wed 15/10

7:00 a.m.-12:59 p.m.

1 stop8h 59m

C$ 441

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 10/10

1:50 p.m.-12:41 a.m.

1 stop7h 51m

Montreal Pierre Elliott Trudeau Intl

Mon 20/10

7:00 a.m.-12:59 p.m.

1 stop8h 59m

C$ 442

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 4/9

1:50 p.m.-12:41 a.m.

1 stop7h 51m

Montreal Pierre Elliott Trudeau Intl

Sat 13/9

7:00 a.m.-12:59 p.m.

1 stop8h 59m

C$ 444

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 4/9

1:50 p.m.-12:41 a.m.

1 stop7h 51m

Montreal Pierre Elliott Trudeau Intl

Wed 10/9

7:00 a.m.-12:59 p.m.

1 stop8h 59m

C$ 444

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sat 6/9

1:50 p.m.-12:41 a.m.

1 stop7h 51m

Montreal Pierre Elliott Trudeau Intl

Tue 9/9

7:00 a.m.-12:59 p.m.

1 stop8h 59m

C$ 450

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 10/9

1:50 p.m.-12:41 a.m.

1 stop7h 51m

Montreal Pierre Elliott Trudeau Intl

Tue 23/9

7:00 a.m.-12:59 p.m.

1 stop8h 59m

C$ 450

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 16/9

2:05 p.m.-12:41 a.m.

1 stop7h 36m

C$ 184

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/8

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 8 August 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$ 317). 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 18 August 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.

Weekly flight availability from Seattle to Montreal Pierre Elliott Trudeau Intl Airport

Explore weekly flight availability from Seattle to Pierre Elliott Trudeau Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 18 August 2025.

The most flights from SEA to YUL are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

What’s the top layover airport for flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?

Share of one-stop round-trip flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

Calgary (YYC) – chosen by Cheapflights users on 50% of one-stop itineraries from Seattle to Montreal Pierre Elliott Trudeau Intl Airport on Cheapflights.

What’s the cheapest layover airport for flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?

Average round-trip fare for 1-stop flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 627.

What’s the fastest layover option from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?

Shortest average travel time for 1-stop one-way flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Calgary (YYC) have the shortest average one-way travel time for 1-stop routes: 7h 36m.

Which airport typically offers the quickest layover for flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?

Average layover duration for 1-stop one-way flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via San Francisco (SFO) offer the fastest connection on this route, with an average layover time of 1h 06m.

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 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 7h 36m. The distance from Seattle to Montreal Pierre Elliott Trudeau Intl Airport is about 3663 km.

  • What are the cheapest flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?

    On average you can expect to pay C$ 946 for a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport. The cheapest flight overall is C$ 237 while the most popular route, (Seattle/Tacoma Intl - Montreal Pierre Elliott Trudeau Intl) is currently priced at C$ 457.

  • 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$ 317). 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
Longueuil
Montebello
Brossard
Drummondville
Trois-Rivières
Saint-Jean-sur-Richelieu
Boucherville
Saint-Sauveur
Bromont
North Hatley
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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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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