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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle from C$ 235

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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — SEA
27 Feb — 6 Mar1
1 adult
1 adult, Economy, 0 bags
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 Friday or Monday and return on a Friday

Cheap flight deals from Pierre Elliott Trudeau Intl to Seattle

Enter your travel dates to find the best prices.

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 28 January 2026.

Thu 5/37:30 p.m.
YUL
-
SEA
1 stop21h 49m
WestJet
Fri 5/67:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Deal found 27/1C$ 353
Thu 7/58:00 p.m.
YUL
-
SEA
1 stop16h 40m
WestJet
Sun 10/57:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Deal found 28/1C$ 355
Wed 13/56:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Sat 23/57:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Deal found 27/1C$ 362
Sun 17/56:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Sat 23/57:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Deal found 26/1C$ 381
Tue 3/37:30 p.m.
YUL
-
SEA
1 stop21h 49m
WestJet
Thu 4/67:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Deal found 27/1C$ 383
Wed 4/36:45 a.m.
YUL
-
SEA
2 stops34h 34m
WestJet
Thu 4/67:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Deal found 27/1C$ 387
Tue 3/37:30 p.m.
YUL
-
SEA
1 stop21h 49m
WestJet
Sat 6/67:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Deal found 27/1C$ 392
Wed 4/36:45 a.m.
YUL
-
SEA
2 stops34h 34m
WestJet
Wed 3/67:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Deal found 27/1C$ 396
Tue 3/37:30 p.m.
YUL
-
SEA
1 stop21h 49m
WestJet
Fri 5/67:35 p.m.
SEA
-
YUL
1 stop8h 25m
WestJet
Deal found 27/1C$ 398
Mon 9/37:30 p.m.
YUL
-
SEA
1 stop21h 49m
WestJet
Fri 13/33:10 p.m.
SEA
-
YUL
1 stop12h 55m
WestJet
Deal found 27/1C$ 399

Find 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 28 January 2026.

Round-trip from

C$ 353

One-way from

C$ 235

Popular in

December

Cheapest in

February

Average price

C$ 580

Good round-trip deal

C$ 625 or less
WestJet
  • WestJet
  • 5/3-5/6
  • 2 total stops
  • 30h 14m total
  • Montreal to Seattle
Search Deals
WestJet
  • WestJet
  • 3/5
  • 1 total stop
  • 16h 40m total
  • Montreal to Seattle
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl.
Search Deals

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 629,999 searches. Data last updated 28 January 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

Mon 16/3

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

2 stops34h 34m

Seattle/Tacoma Intl

Mon 23/3

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

1 stop12h 55m

C$ 392

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 27/5

8:00 p.m.-6:45 p.m.

1 stop25h 45m

Seattle/Tacoma Intl

Sun 31/5

7:35 p.m.-6:25 p.m.

2 stops19h 50m

C$ 392

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 9/3

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

1 stop21h 49m

Seattle/Tacoma Intl

Fri 13/3

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

1 stop12h 55m

C$ 399

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 13/5

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

2 stops15h 00m

Seattle/Tacoma Intl

Sat 23/5

10:30 a.m.-6:25 p.m.

2 stops28h 55m

C$ 413

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 3/3

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

1 stop21h 49m

Seattle/Tacoma Intl

Sat 6/6

7:35 p.m.-6:25 p.m.

2 stops19h 50m

C$ 450

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 5/3

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

2 stops34h 34m

Seattle/Tacoma Intl

Mon 8/6

7:35 p.m.-6:25 p.m.

2 stops19h 50m

C$ 461

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 10/2

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

1 stop21h 49m

Seattle/Tacoma Intl

Tue 24/2

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

1 stop13h 43m

C$ 507

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 9/2

6:45 a.m.-10:54 a.m.

2 stops31h 09m

Seattle/Tacoma Intl

Fri 1/5

10:30 a.m.-12:42 a.m.

1 stop11h 12m

C$ 522

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 17/5

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

2 stops15h 00m

Seattle/Tacoma Intl

Sat 23/5

7:35 p.m.-6:25 p.m.

2 stops19h 50m

C$ 525

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 4/3

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

2 stops34h 34m

Seattle/Tacoma Intl

Mon 8/6

7:35 p.m.-12:40 a.m.

2 stops26h 05m

C$ 544

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/1

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 23 January 2026.

The best time to book flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle is 71 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 Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

Currently, April is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle (average of C$ 271). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in January is currently the most expensive (average of C$ 500). 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 28 January 2026.
See what other customers who have flown with Delta,United Airlines, andAmerican Airlines from Montreal Pierre Elliott Trudeau Intl Airport to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,122 reviews
Check prices

Food

7.2

Boarding

8.1

Crew

8.5

Entertainment

7.8

Comfort

7.9

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,122 reviews
Delta
7.9
Good
8,122 reviews
Check prices

Food

7.2

Boarding

8.1

Crew

8.5

Entertainment

7.8

Comfort

7.9

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,206 reviews
Delta
7.9
Good
8,122 reviews
Check prices

Food

7.2

Boarding

8.1

Crew

8.5

Entertainment

7.8

Comfort

7.9

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,201 reviews
Delta
7.9
Good
8,122 reviews
Check prices

Food

7.2

Boarding

8.1

Crew

8.5

Entertainment

7.8

Comfort

7.9

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
WestJet
7.2
Good
3,251 reviews
Delta
7.9
Good
8,122 reviews
Check prices

Food

7.2

Boarding

8.1

Crew

8.5

Entertainment

7.8

Comfort

7.9

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air Canada
7.1
Good
10,664 reviews
Delta
7.9
Good
8,122 reviews
Check prices

Food

7.2

Boarding

8.1

Crew

8.5

Entertainment

7.8

Comfort

7.9

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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?

    For a flight from Montreal Pierre Elliott Trudeau Intl to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 18.4 km from the centre of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 0 inbound flights from Montreal Pierre Elliott Trudeau Intl per day. 5 airlines have flights to Seattle/Tacoma Intl from Montreal Pierre Elliott Trudeau Intl on a regular basis.

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

    There are many flights that can get you from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in 34h 34m. Fly via WestJet to get the fastest option. The distance between Montreal Pierre Elliott Trudeau Intl Airport and Seattle is about 3663 km.

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

    Flying on American Airlines is currently your cheapest option to Seattle, with prices starting at C$ 255. Additional round-trip tickets that might be worth considering are offered by Delta and WestJet, with the lowest prices starting at C$ 278 and C$ 353, respectively. American Airlines is 60% cheaper than the average price of flights available within the next 90 days to this destination.

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

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 213. Users have also found prices from C$ 259 and C$ 280 on Air Canada and Delta, respectively.

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

    Looking for the cheapest flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle? While on average our users pay C$ 697, our data indicates the cheapest price to be C$ 625. The most popular route (Montreal Pierre Elliott Trudeau Intl - Seattle/Tacoma Intl), is priced around C$ 470.

  • 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, April is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle (average of C$ 271). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in January is currently the most expensive (average of C$ 500). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
SeaTac
Mukilteo
Tacoma
Kent
Tukwila
Bothell
Cashmere
Olympia
Renton
Lynnwood
Marysville
Kirkland

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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.
Pierre Elliott Trudeau Intl to Portland flights
Pierre Elliott Trudeau Intl to Spokane flights
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Top 5 airlines flying from Pierre Elliott Trudeau Intl to Seattle

Discover the top 5 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 629,999 searches. Data last updated 28 January 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 255AverageC$ 536FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapestC$ 278AverageC$ 611FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 353AverageC$ 524FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 491AverageC$ 679FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 512AverageC$ 712FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Pierre Elliott Trudeau Intl to Seattle?

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Why should you use Cheapflights to find cheap flight tickets from Pierre Elliott Trudeau Intl to Seattle?

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 Pierre Elliott Trudeau Intl to Seattle.

Can Cheapflights find flights from Pierre Elliott Trudeau Intl to Seattle with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Pierre Elliott Trudeau Intl to Seattle flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Pierre Elliott Trudeau Intl to Seattle become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Seattle from Pierre Elliott Trudeau Intl today and book when prices fit your budget.

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