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Pierre Elliott Trudeau Intl

$144+ Cheap flights from Seattle (SEA) to Pierre Elliott Trudeau Intl (YUL)

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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YUL
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
1 adult, Economy
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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 Monday or Saturday and return on a Monday

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 July 28, 2025.

Round-trip from

$351
(Trip.com)

One-way from

$144
(Kiwi.com)

Popular in

April

Cheapest in

May

Average price

$587

Good round-trip deal

$465 or less

Good one-way deal

$247 or less
From Seattle/Tacoma Intl to Montreal Pierre Elliott Trudeau Intl
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One-way flight from Seattle/Tacoma Intl to Montreal Pierre Elliott Trudeau Intl
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 28, 2025.

This Trip.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/181:50 pmSEA - YUL
2 stops14h 17mWestJet
Wed 10/87:00 amYUL - SEA
1 stop8h 59mWestJet
Deal found 7/27$351
This flugladen.de deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/108:37 amSEA - YUL
2 stops13h 00mMultiple Airlines
Wed 9/177:00 amYUL - SEA
1 stop8h 59mMultiple Airlines
Deal found 7/27$357
This Flightnetwork deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/102:55 pmSEA - YUL
2 stops13h 15mAir Canada
Wed 9/1710:15 amYUL - SEA
2 stops11h 21mAir Canada
Deal found 7/27$374
This American Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/255:47 pmSEA - YUL
1 stop18h 02mAmerican Airlines
Fri 9/265:15 pmYUL - SEA
1 stop19h 06mAmerican Airlines
Deal found 7/26$420

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 2,558,603 searches. Data last updated July 28, 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 9/18

1:50 pm-7:07 am

2 stops14h 17m

Montreal Pierre Elliott Trudeau Intl

Mon 9/22

7:00 am-12:59 pm

1 stop8h 59m

$351

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 9/10

8:37 am-12:37 am

2 stops13h 00m

Montreal Pierre Elliott Trudeau Intl

Wed 9/17

7:00 am-12:59 pm

1 stop8h 59m

$357

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 9/10

2:55 pm-7:10 am

2 stops13h 15m

Montreal Pierre Elliott Trudeau Intl

Wed 9/17

10:15 am-6:36 pm

2 stops11h 21m

$374

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 9/25

5:47 pm-2:49 pm

1 stop18h 02m

Montreal Pierre Elliott Trudeau Intl

Fri 9/26

5:15 pm-9:21 am

1 stop19h 06m

$420

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 9/17

1:50 pm-2:09 pm

2 stops21h 19m

$144

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 9/18

7:05 am-7:07 am

3 stops21h 02m

$145

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 8/18

7:20 am-3:29 pm

Nonstop5h 09m

$195

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 8/20

7:34 pm-8:16 am

1 stop9h 42m

$199

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 8/19

12:46 am-4:42 pm

1 stop12h 56m

$238

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

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 July 25, 2025.

The best time to book flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport is 54 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?

Currently, January is the cheapest month in which you can book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport (average of $270). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in July is currently the most expensive (average of $409). 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 July 28, 2025.

When flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 66% versus a flight in the morning.

What is the cheapest day to fly from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Pierre Elliott Trudeau Intl. Price data was last updated on July 20, 2025.

Travelers seeking maximum savings on their Seattle to Montreal Pierre Elliott Trudeau Intl Airport flight should consider departing on Thursday afternoons when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 July 28, 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).

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

Reviews of airlines servicing Pierre Elliott Trudeau Intl

Get insights into the airlines that provide service to Pierre Elliott Trudeau Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Pierre Elliott Trudeau Intl. Reviews last updated July 28, 2025.
Read reviews from past customers who have flown United Airlines, American Airlines, and WestJet from Seattle to Montreal Pierre Elliott Trudeau Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,892 reviews

Food

6.6

Overall

7.4

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,892 reviews
United Airlines
7.4
Good
8,892 reviews

Food

6.6

Overall

7.4

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,892 reviews

Food

6.6

Overall

7.4

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
WestJet
7.2
Good
2,968 reviews
United Airlines
7.4
Good
8,892 reviews

Food

6.6

Overall

7.4

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.1
Good
9,813 reviews
United Airlines
7.4
Good
8,892 reviews

Food

6.6

Overall

7.4

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl. On average, Seattle/Tacoma Intl has 2 outbound flights to Montreal Pierre Elliott Trudeau Intl per day from 5 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • What are the cheapest airlines flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport round-trip?

    Currently priced at $351, WestJet will fly you from Seattle to Montreal Pierre Elliott Trudeau Intl Airport and back. In addition to WestJet, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Air Canada and American Airlines - these airlines can fly you to your destination from $374 and $420, respectively. WestJet is 36% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Seattle to Montreal Pierre Elliott Trudeau Intl Airport one-way?

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as $145. Users have also found prices from $195 and $199 on Air Canada and United Airlines, respectively.

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

    While on average a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport is generally $1,871, our data shows the cheapest flight currently is $194. When looking at the most popular route, (Seattle/Tacoma Intl - Montreal Pierre Elliott Trudeau Intl), you can expect to pay $361 for that flight.

  • 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, January is the cheapest month in which you can book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport (average of $270). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in July is currently the most expensive (average of $409). 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

Traveling 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
Longueuil
Brossard
Sherbrooke
Dorval

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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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Top 5 airlines flying from Seattle to Pierre Elliott Trudeau Intl

Discover the top 5 airlines that operate flights from Seattle to Pierre Elliott Trudeau Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$228Average$616FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$270Average$605FlexibilityNo cancel feeOn-time67%
WestJetCheapest$313Average$530FlexibilityNo cancel feeOn-time60%
DeltaCheapest$455Average$656FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$465Average$668FlexibilityNo cancel feeOn-time71%

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