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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle from C$ 282

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — SEA
27 Aug — 3 Sep1
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 81 days in advance, depart on a Wednesday or Saturday and return on a Wednesday

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 July 2026.

Sat 12/96:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Sat 19/910:30 a.m.
SEA
-
YUL
2 stops10h 55m
WestJet
Deal found 25/7C$ 550
Thu 22/1012:30 p.m.
YUL
-
SEA
1 stop10h 45m
American Airlines
Mon 26/109:42 p.m.
SEA
-
YUL
2 stops11h 39m
American Airlines
Deal found 25/7C$ 551
Sun 13/97:15 a.m.
YUL
-
SEA
1 stop29h 25m
WestJet
Sat 19/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Deal found 25/7C$ 553
Tue 25/86:10 a.m.
YUL
-
SEA
2 stops15h 58m
United Airlines
Tue 1/95:20 p.m.
SEA
-
YUL
2 stops14h 20m
United Airlines
Deal found 26/7C$ 554
Sat 19/96:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Fri 25/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Deal found 24/7C$ 556
Thu 20/86:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Fri 28/810:30 a.m.
SEA
-
YUL
2 stops10h 55m
WestJet
Deal found 26/7C$ 557
Fri 18/95:45 p.m.
YUL
-
SEA
2 stops28h 00m
WestJet
Sun 27/910:30 a.m.
SEA
-
YUL
2 stops10h 55m
WestJet
Deal found 26/7C$ 558
Tue 20/106:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Wed 21/1010:30 a.m.
SEA
-
YUL
2 stops10h 55m
WestJet
Deal found 25/7C$ 560
Sat 10/106:45 a.m.
YUL
-
SEA
2 stops15h 00m
WestJet
Thu 15/1010:30 a.m.
SEA
-
YUL
2 stops10h 55m
WestJet
Deal found 23/7C$ 561
Fri 21/85:45 p.m.
YUL
-
SEA
2 stops18h 55m
WestJet
Fri 28/87:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Deal found 23/7C$ 563
Fri 18/95:30 p.m.
YUL
-
SEA
1 stop28h 15m
WestJet
Fri 25/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Deal found 25/7C$ 564
Sun 20/95:45 p.m.
YUL
-
SEA
2 stops28h 00m
WestJet
Sat 26/97:35 p.m.
SEA
-
YUL
1 stop8h 30m
WestJet
Deal found 25/7C$ 566

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 July 2026.

Round-trip from

C$ 550

One-way from

C$ 282

Popular in

June

Cheapest in

February

Average price

C$ 814
WestJet
  • WestJet
  • 12/9-19/9
  • 4 total stops
  • 25h 55m total
  • Montreal to Seattle
Search Deals
Air Canada
  • Air Canada
  • 16/9
  • 1 total stop
  • 7h 47m total
  • Montreal to Seattle
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 150 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 28 July 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
Quickest round-trip

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 12/9

9:45 a.m.-5:42 p.m.

2 stops10h 57m

Seattle/Tacoma Intl

Sat 19/9

7:00 a.m.-5:30 p.m.

1 stop7h 30m

C$ 554

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 2/9

6:00 a.m.-3:52 p.m.

2 stops12h 52m

Seattle/Tacoma Intl

Sat 12/9

5:20 p.m.-8:16 a.m.

1 stop11h 56m

C$ 554

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 25/8

9:15 a.m.-4:06 p.m.

1 stop9h 51m

Seattle/Tacoma Intl

Tue 1/9

5:20 p.m.-10:40 a.m.

2 stops14h 20m

C$ 554

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 22/8

9:45 a.m.-8:43 p.m.

2 stops13h 58m

Seattle/Tacoma Intl

Sat 29/8

3:30 p.m.-8:16 a.m.

1 stop13h 46m

C$ 554

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 5/10

6:00 a.m.-2:49 p.m.

1 stop11h 49m

Seattle/Tacoma Intl

Mon 19/10

11:59 p.m.-11:38 a.m.

1 stop8h 39m

C$ 567

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 25/8

6:10 a.m.-11:32 a.m.

1 stop8h 22m

Seattle/Tacoma Intl

Mon 31/8

5:13 p.m.-10:40 a.m.

1 stop14h 27m

C$ 577

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 19/8

11:23 a.m.-11:04 p.m.

2 stops14h 41m

Seattle/Tacoma Intl

Fri 28/8

6:52 p.m.-10:40 a.m.

2 stops12h 48m

C$ 577

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 22/8

6:45 a.m.-9:00 p.m.

2 stops17h 15m

Seattle/Tacoma Intl

Sun 30/8

7:35 p.m.-4:45 p.m.

2 stops18h 10m

C$ 585

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 28/8

9:45 a.m.-11:04 p.m.

2 stops16h 19m

Seattle/Tacoma Intl

Mon 31/8

6:30 a.m.-8:16 a.m.

2 stops22h 46m

C$ 599

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 8/9

1:10 p.m.-9:04 p.m.

1 stop10h 54m

Seattle/Tacoma Intl

Wed 28/10

8:40 a.m.-8:43 p.m.

1 stop9h 03m

C$ 611

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/7

Showing 1-10 of 21 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?

The best time to book flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle is 80 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, February is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle (average of C$ 588). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in June is currently the most expensive (average of C$ 879). 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?

Airfare is below average for this route at the moment.

Montreal Pierre Elliott Trudeau Intl Airport to Seattle flights typically cost between C$ 601 and C$ 866 in September.
The cheapest round-trip price found within the last 5 days was C$ 550 on WestJet (12 Sep-19 Sep).

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 July 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
7.8
Good
8,489 reviews
Check prices

Crew

8.5

Food

7.2

Entertainment

7.8

Comfort

7.8

Boarding

8.1

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
Delta
7.8
Good
8,489 reviews
Delta
7.8
Good
8,489 reviews
Check prices

Crew

8.5

Food

7.2

Entertainment

7.8

Comfort

7.8

Boarding

8.1

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
United Airlines
7.4
Good
10,047 reviews
Delta
7.8
Good
8,489 reviews
Check prices

Crew

8.5

Food

7.2

Entertainment

7.8

Comfort

7.8

Boarding

8.1

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
WestJet
7.2
Good
3,415 reviews
Delta
7.8
Good
8,489 reviews
Check prices

Crew

8.5

Food

7.2

Entertainment

7.8

Comfort

7.8

Boarding

8.1

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
American Airlines
7.1
Good
11,845 reviews
Delta
7.8
Good
8,489 reviews
Check prices

Crew

8.5

Food

7.2

Entertainment

7.8

Comfort

7.8

Boarding

8.1

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
Air Canada
7.1
Good
11,400 reviews
Delta
7.8
Good
8,489 reviews
Check prices

Crew

8.5

Food

7.2

Entertainment

7.8

Comfort

7.8

Boarding

8.1

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,

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 10h 57m. Fly via United Airlines 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 Delta is currently your cheapest option to Seattle, with prices starting at C$ 287. Additional round-trip tickets that might be worth considering are offered by WestJet and American Airlines, with the lowest prices starting at C$ 417 and C$ 428, respectively. Delta is 59% 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, February is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle (average of C$ 588). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in June is currently the most expensive (average of C$ 879). 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
Kent
Leavenworth
Mukilteo
Tacoma
Renton
Cashmere
Lynnwood
Ellensburg
Tukwila
Olympia
Marysville
Federal Way
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
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 28 July 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 287AverageC$ 715FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 417AverageC$ 533FlexibilityNo cancel feeOn-time60%
Search WestJet flights
American AirlinesCheapestC$ 428AverageC$ 636FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 507AverageC$ 879FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 547AverageC$ 736FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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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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