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Cheap flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport from C$ 161

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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YUL
11 Jan — 18 Jan1
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 42 days in advance, depart on a Friday or Thursday and return on a Friday

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 12 December 2025.

Sat 27/1211:10 p.m.SEA - YUL
1 stop14h 17mMultiple Airlines
Sun 4/17:30 p.m.YUL - SEA
2 stops40h 24mMultiple Airlines
Deal found 11/12C$ 958
Tue 23/128:00 p.m.SEA - YUL
1 stop7h 44mAir Canada
Sat 10/11:15 p.m.YUL - SEA
2 stops11h 51mAir Canada
Deal found 11/12C$ 1,078
Fri 26/125:50 a.m.SEA - YUL
1 stop8h 10mAir Canada
Fri 2/17:30 a.m.YUL - SEA
1 stop17h 36mAir Canada
Deal found 11/12C$ 1,092
Sat 13/1212:48 p.m.SEA - YUL
2 stops32h 42mMultiple Airlines
Tue 16/125:10 p.m.YUL - SEA
1 stop9h 09mMultiple Airlines
Deal found 10/12C$ 1,134
Thu 11/123:10 p.m.SEA - YUL
1 stop12h 55mWestJet
Thu 18/127:30 p.m.YUL - SEA
1 stop21h 50mWestJet
Deal found 10/12C$ 1,225
Wed 17/125:50 a.m.SEA - YUL
1 stop8h 10mAir Canada
Tue 23/123:10 p.m.YUL - SEA
1 stop10h 06mAir Canada
Deal found 9/12C$ 1,233
Mon 29/128:05 a.m.SEA - YUL
1 stop20h 00mMultiple Airlines
Sat 3/17:20 p.m.YUL - SEA
2 stops41h 51mMultiple Airlines
Deal found 10/12C$ 1,245
Wed 10/127:34 p.m.SEA - YUL
1 stop18h 15mUnited Airlines
Wed 24/125:25 p.m.YUL - SEA
1 stop19h 30mUnited Airlines
Deal found 10/12C$ 1,248
Wed 24/1211:10 p.m.SEA - YUL
1 stop14h 17mMultiple Airlines
Sat 3/17:20 p.m.YUL - SEA
2 stops40h 34mMultiple Airlines
Deal found 10/12C$ 1,251

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 12 December 2025.

Round-trip from

C$ 379

One-way from

C$ 161

Popular in

December

Cheapest in

May

Average price

C$ 1,149
WestJet
  • WestJet
  • 11/1-20/1
  • 2 total stops
  • 38h 00m total
  • Seattle to Montreal
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WestJet
  • WestJet
  • 2/3
  • 1 total stop
  • 21h 03m total
  • Seattle to Montreal
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (C$ 225 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 12 December 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

Thu 8/1

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

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Thu 15/1

6:45 a.m.-7:17 p.m.

1 stop15h 32m

C$ 499

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 11/2

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

1 stop13h 43m

Montreal Pierre Elliott Trudeau Intl

Sun 15/2

6:45 a.m.-7:18 p.m.

1 stop15h 33m

C$ 550

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 14/1

3:39 p.m.-7:05 a.m.

2 stops12h 26m

Montreal Pierre Elliott Trudeau Intl

Mon 19/1

7:30 p.m.-7:52 p.m.

1 stop27h 22m

C$ 554

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 2/2

3:40 p.m.-7:10 a.m.

2 stops12h 30m

Montreal Pierre Elliott Trudeau Intl

Tue 3/2

10:10 a.m.-7:16 p.m.

2 stops12h 06m

C$ 563

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 2/2

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

1 stop12h 55m

Montreal Pierre Elliott Trudeau Intl

Tue 3/2

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

1 stop21h 49m

C$ 567

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 20/3

11:55 a.m.-7:05 a.m.

2 stops16h 10m

Montreal Pierre Elliott Trudeau Intl

Wed 25/3

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

2 stops34h 34m

C$ 574

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Sun 8/2

5:50 a.m.-7:14 p.m.

2 stops10h 24m

Montreal Pierre Elliott Trudeau Intl

Fri 13/2

7:30 a.m.-2:31 p.m.

1 stop10h 01m

C$ 581

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 14/1

9:55 a.m.-8:55 p.m.

1 stop8h 00m

Montreal Pierre Elliott Trudeau Intl

Mon 19/1

4:10 p.m.-10:16 p.m.

1 stop9h 06m

C$ 582

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 27/5

7:05 a.m.-12:42 a.m.

1 stop14h 37m

Montreal Pierre Elliott Trudeau Intl

Sun 31/5

8:30 a.m.-8:28 p.m.

2 stops14h 58m

C$ 585

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 16/1

8:10 a.m.-8:45 p.m.

2 stops9h 35m

Montreal Pierre Elliott Trudeau Intl

Tue 20/1

1:25 p.m.-7:16 p.m.

1 stop8h 51m

C$ 589

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 22 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 5 December 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 42 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$ 292). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in December is currently the most expensive (average of C$ 798). 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 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$ 211 on WestJet. Other airlines that offer cheap prices include Air Canada from C$ 237 and United Airlines from C$ 329 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$ 292). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in December is currently the most expensive (average of C$ 798). 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
Trois-Rivières
Brossard
Montebello
Boucherville
Longueuil
Drummondville
Magog
Saint-Jean-sur-Richelieu
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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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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