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$173+ Cheap flights from Pierre Elliott Trudeau Intl (YUL) to Seattle (SEA)

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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — SEA
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl are usually found in October or August, booked 37 days in advance, depart on a Monday or Thursday and return on a Monday

Cheap flight deals from Pierre Elliott Trudeau Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Pierre Elliott Trudeau Intl (YUL) to Seattle (SEA). 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 September 15, 2025.

Round-trip from

$332
(oojo)

One-way from

$173
(Mytrip)

Popular in

December

Cheapest in

October

Average price

$476

Good round-trip deal

$263 or less

Good one-way deal

$259 or less
From Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl
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One-way flight from Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 7% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl.
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Find flight deals from Pierre Elliott Trudeau Intl to Seattle

Cheapest flights from Pierre Elliott Trudeau Intl to Seattle
Explore the most affordable flight options available from Pierre Elliott Trudeau Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This oojo deal was found by Cheapflights users on 9/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/216:45 amYUL - SEA
2 stops33h 14mWestJet
Wed 10/293:10 pmSEA - YUL
2 stops30h 33mWestJet
Deal found 9/14$332
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:30 pmYUL - SEA
2 stops22h 05mMultiple Airlines
Thu 10/303:10 pmSEA - YUL
1 stop19h 22mMultiple Airlines
Deal found 9/14$334
This oojo deal was found by Cheapflights users on 9/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/216:45 amYUL - SEA
2 stops34h 53mWestJet
Sun 11/233:10 pmSEA - YUL
2 stops30h 33mWestJet
Deal found 9/14$337
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:30 pmYUL - SEA
2 stops22h 05mMultiple Airlines
Mon 10/2711:10 pmSEA - YUL
1 stop14h 17mMultiple Airlines
Deal found 9/14$338
This deal was found by Cheapflights users on 9/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/67:30 amYUL - SEA
1 stop10h 01mAir Canada
Fri 12/128:15 amSEA - YUL
1 stop10h 37mAir Canada
Deal found 9/14$341
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/176:45 amYUL - SEA
2 stops12h 18mMultiple Airlines
Mon 10/202:05 pmSEA - YUL
1 stop7h 36mMultiple Airlines
Deal found 9/15$343
This Air Canada deal was found by Cheapflights users on 9/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/118:00 amYUL - SEA
2 stops13h 36mAir Canada
Fri 10/313:40 pmSEA - YUL
2 stops12h 30mAir Canada
Deal found 9/14$344
This deal was found by Cheapflights users on 9/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/84:10 pmYUL - SEA
1 stop9h 06mAir Canada
Sat 12/138:15 amSEA - YUL
1 stop10h 37mAir Canada
Deal found 9/14$347
This Air Canada deal was found by Cheapflights users on 9/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:00 amYUL - SEA
1 stop7h 59mAir Canada
Mon 10/275:50 amSEA - YUL
1 stop10h 35mAir Canada
Deal found 9/14$351
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/125:30 pmYUL - SEA
2 stops16h 41mMultiple Airlines
Thu 10/231:50 pmSEA - YUL
1 stop7h 51mMultiple Airlines
Deal found 9/15$352
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/14:45 pmYUL - SEA
Nonstop5h 46mAir Canada
Mon 10/137:15 amSEA - YUL
Nonstop5h 13mAir Canada
Deal found 9/13$353
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/119:50 pmYUL - SEA
1 stop16h 09mAir Canada
Sat 10/187:30 amSEA - YUL
1 stop7h 50mAir Canada
Deal found 9/13$354

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pierre Elliott Trudeau Intl to Seattle 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 September 15, 2025.
Use the filters below to find and compare flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle that are best for you.

Fly from

Pierre Elliott Trudeau Intl

Fly to

Seattle

Route

Depart

Return

Price

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 11/8

6:00 am-2:31 pm

2 stops11h 31m

Seattle/Tacoma Intl

Sat 11/15

5:50 am-7:53 pm

2 stops11h 03m

$334

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 10/11

8:00 am-6:36 pm

2 stops13h 36m

Seattle/Tacoma Intl

Mon 10/27

3:40 pm-7:10 am

2 stops12h 30m

$344

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 10/3

9:45 am-3:45 pm

1 stop9h 00m

Seattle/Tacoma Intl

Mon 10/13

7:15 am-3:28 pm

Nonstop5h 13m

$353

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 10/11

9:50 pm-10:59 am

1 stop16h 09m

Seattle/Tacoma Intl

Sat 10/18

7:30 am-6:20 pm

1 stop7h 50m

$354

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 12/25

2:35 pm-11:29 pm

1 stop11h 54m

Seattle/Tacoma Intl

Tue 12/30

12:59 am-1:44 pm

1 stop9h 45m

$355

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 10/6

9:50 pm-10:59 am

1 stop16h 09m

Seattle/Tacoma Intl

Fri 10/31

3:40 pm-7:10 am

2 stops12h 30m

$356

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 10/3

6:00 am-10:59 am

1 stop7h 59m

Seattle/Tacoma Intl

Mon 10/13

5:30 am-4:36 pm

1 stop8h 06m

$359

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 10/18

10:45 am-10:39 pm

2 stops14h 54m

Seattle/Tacoma Intl

Fri 10/24

1:50 pm-12:41 am

1 stop7h 51m

$362

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 9/28

4:45 pm-7:31 pm

Nonstop5h 46m

Seattle/Tacoma Intl

Sun 10/5

7:15 am-3:28 pm

Nonstop5h 13m

$366

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 10/2

4:45 pm-7:31 pm

Nonstop5h 46m

Seattle/Tacoma Intl

Mon 10/6

11:10 pm-2:50 pm

1 stop12h 40m

$366

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 21 results
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Best time to book a flight from Pierre Elliott Trudeau Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Pierre Elliott Trudeau Intl 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 Montreal Pierre Elliott Trudeau Intl Airport to Seattle

How far ahead should I book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Pierre Elliott Trudeau Intl to Seattle. Price data was last updated on September 12, 2025.

To ensure you get the cheapest price possible for a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle, you should look to book at least 37 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle (average of $238). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in June is currently the most expensive (average of $387). 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 YUL to SEA?

Find hourly flight availability from Pierre Elliott Trudeau Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 29% on flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle by exploring options for tickets in the afternoon.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated September 15, 2025.
Get a feel of what it's like to fly with WestJet and Air Canada from Montreal Pierre Elliott Trudeau Intl Airport to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
WestJet
7.2
Good
3,091 reviews

Crew

7.9

Food

6.2

Entertainment

6.1

Overall

7.2

Comfort

7.1

Boarding

7.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

YYJ - YVR

everything was good except we were so delayed we had to sleep on the floor in the vancouver airport … we were stranded there for 12 hours, no vouchers, no compensation, just a cold floor and we arrived at our final destination the following afternoon
WestJet
7.2
Good
3,091 reviews
WestJet
7.2
Good
3,091 reviews

Crew

7.9

Food

6.2

Entertainment

6.1

Overall

7.2

Comfort

7.1

Boarding

7.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

YYJ - YVR

everything was good except we were so delayed we had to sleep on the floor in the vancouver airport … we were stranded there for 12 hours, no vouchers, no compensation, just a cold floor and we arrived at our final destination the following afternoon
Air Canada
7.1
Good
10,000 reviews
WestJet
7.2
Good
3,091 reviews

Crew

7.9

Food

6.2

Entertainment

6.1

Overall

7.2

Comfort

7.1

Boarding

7.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

YYJ - YVR

everything was good except we were so delayed we had to sleep on the floor in the vancouver airport … we were stranded there for 12 hours, no vouchers, no compensation, just a cold floor and we arrived at our final destination the following afternoon

Related info for your journey

Find useful and relevant information for your journey from Pierre Elliott Trudeau Intl to Seattle. 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 into for flights to Seattle from Montreal Pierre Elliott Trudeau Intl?

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

  • How long is the flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

    Airlines like Air Canada and Delta fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in about 11h 31m. The time it takes to get you to your destination can typically vary by up to 23m. The distance from Montreal Pierre Elliott Trudeau Intl Airport to Seattle is about 2276 mi. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle round-trip from $270. Another airline that can offer you cheap pricing is Air Canada. WestJet is currently priced 46% below the average price you’ll pay for this route.

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

    The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as $179. However, be on the lookout for offers from Delta and United Airlines, as they are both options that can get you from Montreal Pierre Elliott Trudeau Intl Airport to Seattle for a low price.

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

    On average you can expect to pay $397 for a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle. The cheapest flight overall is $182 while the most popular route, (Montreal Pierre Elliott Trudeau Intl - Seattle/Tacoma Intl) is currently priced at $264.

  • Can I find deals for flights from Pierre Elliott Trudeau Intl to Seattle that include hotel bookings?

    Yes. In addition to deals on Pierre Elliott Trudeau Intl to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Pierre Elliott Trudeau Intl to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Pierre Elliott Trudeau Intl to Seattle.

  • Can I find deals for business class flights from Pierre Elliott Trudeau Intl to Seattle?

    Yes. Cheapflights offers flight deals from Pierre Elliott Trudeau Intl to Seattle 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 Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle (average of $238). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in June is currently the most expensive (average of $387). 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

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Alternative routes for Pierre Elliott Trudeau Intl to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Pierre Elliott Trudeau Intl to Seattle

Discover the top 2 airlines that operate flights from Pierre Elliott Trudeau Intl to Seattle. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$270Average$595FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$326Average$469FlexibilityNo cancel feeOn-time67%

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