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$133+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — SEA
feb. 11 — feb. 181
mié. 2/11
mié. 2/18
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl are usually found in February or January, booked 71 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 enero 12, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$209
(oojo)

One-way from

$133
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$417

Good one-way deal

$297 or less
Provider with most accurate pricing for Montreal Pierre Elliott Trudeau Intl-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Montreal Pierre Elliott Trudeau Intl-Seattle/Tacoma Intl flights.
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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. 3% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 enero 12, 2026.

This oojo deal was found by Cheapflights users on 1/12. 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.
mar. 5/56:45 am
YUL
-
SEA
1 stop9h 23m
WestJet
dom. 5/102:05 pm
SEA
-
YUL
1 stop7h 37m
WestJet
Deal found 1/12$209
This Kiwi.com deal was found by Cheapflights users on 1/11. 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.
mar. 4/286:45 am
YUL
-
SEA
1 stop9h 23m
WestJet
lun. 5/42:05 pm
SEA
-
YUL
1 stop7h 37m
WestJet
Deal found 1/11$217
This oojo deal was found by Cheapflights users on 1/12. 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.
dom. 4/56:45 am
YUL
-
SEA
2 stops34h 34m
WestJet
sáb. 5/22:05 pm
SEA
-
YUL
1 stop7h 37m
WestJet
Deal found 1/12$240
This FlightHub deal was found by Cheapflights users on 1/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/214:15 pm
YUL
-
SEA
1 stop25h 04m
WestJet
lun. 4/272:05 pm
SEA
-
YUL
1 stop7h 37m
WestJet
Deal found 1/11$242
This Trip.com deal was found by Cheapflights users on 1/11. 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.
mié. 4/224:15 pm
YUL
-
SEA
1 stop25h 04m
WestJet
mar. 4/282:05 pm
SEA
-
YUL
1 stop7h 37m
WestJet
Deal found 1/11$244
This oojo deal was found by Cheapflights users on 1/12. 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.
jue. 2/56:45 am
YUL
-
SEA
2 stops34h 34m
WestJet
mar. 2/103:10 pm
SEA
-
YUL
2 stops30h 28m
WestJet
Deal found 1/12$250
This oojo deal was found by Cheapflights users on 1/12. 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.
sáb. 2/76:45 am
YUL
-
SEA
2 stops34h 34m
WestJet
mar. 2/103:10 pm
SEA
-
YUL
2 stops30h 28m
WestJet
Deal found 1/12$259
This FlightHub deal was found by Cheapflights users on 1/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/234:15 pm
YUL
-
SEA
1 stop25h 04m
WestJet
dom. 4/262:05 pm
SEA
-
YUL
1 stop7h 37m
WestJet
Deal found 1/11$263
This oojo deal was found by Cheapflights users on 1/11. 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.
mié. 5/136:45 am
YUL
-
SEA
1 stop16h 43m
WestJet
sáb. 5/237:05 am
SEA
-
YUL
2 stops14h 35m
WestJet
Deal found 1/11$270

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 enero 12, 2026.
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

jue. 4/23

4:15 pm-2:19 pm

1 stop25h 04m

Seattle/Tacoma Intl

lun. 4/27

2:05 pm-12:42 am

1 stop7h 37m

$244

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

jue. 2/5

6:45 am-2:19 pm

2 stops34h 34m

Seattle/Tacoma Intl

mar. 2/10

3:10 pm-7:05 am

1 stop12h 55m

$257

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

jue. 4/23

4:15 pm-2:19 pm

1 stop25h 04m

Seattle/Tacoma Intl

dom. 4/26

2:05 pm-12:42 am

1 stop7h 37m

$263

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mar. 4/21

4:15 pm-2:19 pm

1 stop25h 04m

Seattle/Tacoma Intl

mar. 4/28

2:05 pm-12:42 am

1 stop7h 37m

$263

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mié. 5/13

5:30 pm-1:08 pm

1 stop22h 38m

Seattle/Tacoma Intl

sáb. 5/23

7:05 am-12:40 am

2 stops14h 35m

$270

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mar. 5/5

6:45 am-1:08 pm

2 stops33h 23m

Seattle/Tacoma Intl

dom. 5/10

7:05 am-12:40 am

2 stops14h 35m

$271

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

jue. 4/23

6:45 am-2:19 pm

2 stops34h 34m

Seattle/Tacoma Intl

mar. 4/28

2:05 pm-12:42 am

1 stop7h 37m

$286

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mar. 2/3

6:45 am-7:17 pm

1 stop15h 32m

Seattle/Tacoma Intl

jue. 2/5

9:25 pm-7:05 am

2 stops30h 40m

$294

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mar. 2/3

6:45 am-7:17 pm

1 stop15h 32m

Seattle/Tacoma Intl

mar. 2/10

7:55 am-12:38 am

1 stop13h 43m

$297

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

jue. 2/5

6:45 am-7:17 pm

1 stop15h 32m

Seattle/Tacoma Intl

mar. 2/10

7:55 am-12:38 am

1 stop13h 43m

$299

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/12

Showing 1-10 of 20 results
1
2

Compare providers for flights from Pierre Elliott Trudeau Intl to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Pierre Elliott Trudeau Intl to Seattle in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Montreal Pierre Elliott Trudeau Intl Airport-Seattle flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Montreal Pierre Elliott Trudeau Intl Airport-Seattle flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Montreal Pierre Elliott Trudeau Intl Airport-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Montreal Pierre Elliott Trudeau Intl Airport-Seattle flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Montreal Pierre Elliott Trudeau Intl Airport-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 January 9, 2026.

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 71 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, November is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle (average of $203). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in January is currently the most expensive (average of $365). 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.

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

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 enero 12, 2026.
Get a feel of what it's like to fly with United Airlines 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.
United Airlines
7.4
Good
9,143 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,143 reviews
United Airlines
7.4
Good
9,143 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Air Canada
7.1
Good
10,616 reviews
United Airlines
7.4
Good
9,143 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 0 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 WestJet fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in about 25h 04m. The time it takes to get you to your destination can typically vary by up to . The distance from Montreal Pierre Elliott Trudeau Intl Airport to Seattle is about 2276 mi.

  • 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 $263. Another airline that can offer you cheap pricing is Air Canada. United Airlines is currently priced 44% 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 WestJet, with whom users have recently found tickets for as low as $134. However, be on the lookout for offers from Air Canada and Delta, 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 $297 for a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle. The cheapest flight overall is $243 while the most popular route, (Montreal Pierre Elliott Trudeau Intl - Seattle/Tacoma Intl) is currently priced at $239.

  • 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, November is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle (average of $203). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in January is currently the most expensive (average of $365). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
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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 enero 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$316Average$488FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$543Average$890FlexibilityNo cancel feeOn-time69%

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