Find flights
When to book
Airlines
FAQs

Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle from C$ 258

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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — SEA
14 Apr — 21 Apr1
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 June, booked 71 days in advance, depart on a Wednesday or Friday 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 15 March 2026.

Sat 25/47:30 a.m.
YUL
-
SEA
1 stop10h 01m
WestJet
Sat 2/57:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Deal found 11/3C$ 376
Sat 25/47:30 a.m.
YUL
-
SEA
1 stop10h 01m
WestJet
Fri 1/57:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Deal found 11/3C$ 380
Wed 13/56:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Sat 23/57:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Deal found 13/3C$ 403
Mon 11/56:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Sat 16/57:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Deal found 12/3C$ 407
Wed 22/46:45 a.m.
YUL
-
SEA
2 stops34h 34m
WestJet
Wed 29/47:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Deal found 11/3C$ 420
Thu 4/66:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Sat 13/67:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Deal found 13/3C$ 421

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 15 March 2026.

Round-trip from

C$ 376

One-way from

C$ 258

Popular in

December

Cheapest in

February

Average price

C$ 731
WestJet
  • WestJet
  • 25/4-2/5
  • 2 total stops
  • 18h 31m total
  • Montreal to Seattle
Search Deals
WestJet
  • WestJet
  • 9/6
  • 2 total stops
  • 15h 00m total
  • Montreal to Seattle
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 39 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 March 2026
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 15 March 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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 7/4

4:15 p.m.-2:19 p.m.

1 stop25h 04m

Seattle/Tacoma Intl

Thu 9/4

3:10 p.m.-12:38 a.m.

2 stops54h 28m

C$ 534

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 22/7

5:30 p.m.-9:40 a.m.

1 stop19h 10m

Seattle/Tacoma Intl

Mon 27/7

7:00 a.m.-7:05 a.m.

1 stop21h 05m

C$ 638

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 7/4

6:10 a.m.-11:48 a.m.

1 stop8h 38m

Seattle/Tacoma Intl

Thu 9/4

10:35 p.m.-10:40 a.m.

1 stop9h 05m

C$ 642

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 16/4

6:00 a.m.-2:17 p.m.

1 stop11h 17m

Seattle/Tacoma Intl

Mon 20/4

7:15 a.m.-11:51 p.m.

2 stops13h 36m

C$ 643

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 7/4

12:42 p.m.-9:13 p.m.

2 stops11h 31m

Seattle/Tacoma Intl

Tue 14/4

8:30 p.m.-11:59 a.m.

2 stops12h 29m

C$ 645

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 15/5

8:00 p.m.-9:40 a.m.

1 stop16h 40m

Seattle/Tacoma Intl

Sat 16/5

7:35 p.m.-7:05 a.m.

1 stop8h 30m

C$ 646

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 8/4

2:20 p.m.-8:53 p.m.

1 stop9h 33m

Seattle/Tacoma Intl

Sun 12/4

11:59 p.m.-10:40 a.m.

1 stop7h 41m

C$ 652

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 15/4

11:23 a.m.-10:56 p.m.

2 stops14h 33m

Seattle/Tacoma Intl

Wed 29/4

6:30 a.m.-10:06 p.m.

2 stops12h 36m

C$ 652

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 16/4

5:00 p.m.-12:34 a.m.

1 stop10h 34m

Seattle/Tacoma Intl

Mon 20/4

11:59 p.m.-10:40 a.m.

1 stop7h 41m

C$ 652

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 9/4

6:00 a.m.-2:20 p.m.

1 stop11h 20m

Seattle/Tacoma Intl

Thu 16/4

8:20 a.m.-11:26 p.m.

1 stop12h 06m

C$ 653

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/3

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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 13 March 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$ 257). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in February is currently the most expensive (average of C$ 572). 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 15 March 2026.
See what other customers who have flown with Delta,United Airlines, andWestJet 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
8,293 reviews
Check prices

Entertainment

7.8

Overall

7.9

Food

7.2

Comfort

7.9

Crew

8.5

Boarding

8.1

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
8,293 reviews
Delta
7.9
Good
8,293 reviews
Check prices

Entertainment

7.8

Overall

7.9

Food

7.2

Comfort

7.9

Crew

8.5

Boarding

8.1

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
9,427 reviews
Delta
7.9
Good
8,293 reviews
Check prices

Entertainment

7.8

Overall

7.9

Food

7.2

Comfort

7.9

Crew

8.5

Boarding

8.1

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
3,295 reviews
Delta
7.9
Good
8,293 reviews
Check prices

Entertainment

7.8

Overall

7.9

Food

7.2

Comfort

7.9

Crew

8.5

Boarding

8.1

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
7.1
Good
11,472 reviews
Delta
7.9
Good
8,293 reviews
Check prices

Entertainment

7.8

Overall

7.9

Food

7.2

Comfort

7.9

Crew

8.5

Boarding

8.1

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
10,801 reviews
Delta
7.9
Good
8,293 reviews
Check prices

Entertainment

7.8

Overall

7.9

Food

7.2

Comfort

7.9

Crew

8.5

Boarding

8.1

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 8h 38m. Fly via WestJet, United Airlines, or Delta to get the fastest option. The distance between Montreal Pierre Elliott Trudeau Intl Airport and Seattle is about 3663 km. 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?

    Flying on American Airlines is currently your cheapest option to Seattle, with prices starting at C$ 256. Additional round-trip tickets that might be worth considering are offered by Delta and WestJet, with the lowest prices starting at C$ 279 and C$ 355, respectively. American Airlines is 60% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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$ 257). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in February is currently the most expensive (average of C$ 572). 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
SeaTac
Leavenworth
Mukilteo
Tacoma
Kent
Bothell
Cashmere
Tukwila
Olympia
Renton
Marysville
Lynnwood
Kirkland

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
Pierre Elliott Trudeau Intl to Pasco flights

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 15 March 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 256AverageC$ 556FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapestC$ 279AverageC$ 661FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 355AverageC$ 496FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 493AverageC$ 715FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 498AverageC$ 679FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Seattle from Pierre Elliott Trudeau Intl today with Cheapflights!

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.