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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle from C$ 217

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 25/1. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — SEA
11 ene. — 18 ene.1
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 May or September, booked 37 days in advance, depart on a Friday or Tuesday and return on a Friday

Cheap flight deals from Pierre Elliott Trudeau Intl to Seattle

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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 12 diciembre 2025.

mié. 24/125:25 p.m.YUL - SEA
1 stop19h 30mUnited Airlines
lun. 19/17:00 a.m.SEA - YUL
1 stop8h 40mUnited Airlines
Deal found 10/12C$ 623
jue. 25/121:15 p.m.YUL - SEA
2 stops12h 01mAir Canada
mar. 30/125:50 a.m.SEA - YUL
1 stop8h 10mAir Canada
Deal found 9/12C$ 709
lun. 29/125:25 p.m.YUL - SEA
1 stop19h 31mUnited Airlines
mié. 4/28:40 a.m.SEA - YUL
2 stops23h 50mUnited Airlines
Deal found 10/12C$ 790
dom. 21/124:10 p.m.YUL - SEA
1 stop9h 06mAir Canada
sáb. 31/19:55 a.m.SEA - YUL
1 stop8h 05mAir Canada
Deal found 10/12C$ 852
dom. 21/129:15 a.m.YUL - SEA
1 stop14h 42mUnited Airlines
sáb. 31/112:40 p.m.SEA - YUL
2 stops18h 40mUnited Airlines
Deal found 10/12C$ 863
dom. 28/126:45 a.m.YUL - SEA
2 stops27h 35mWestJet
mié. 4/23:10 p.m.SEA - YUL
1 stop12h 55mWestJet
Deal found 10/12C$ 923

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 12 diciembre 2025.

Round-trip from

C$ 317

One-way from

C$ 217

Popular in

December

Cheapest in

May

Average price

C$ 760
WestJet
  • WestJet
  • 27/5-31/5
  • 2 total stops
  • 24h 00m total
  • Montreal to Seattle
Search Deals
WestJet
  • WestJet
  • 8/1
  • 1 total stop
  • 21h 50m total
  • Montreal to Seattle
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 12 diciembre 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

sáb. 6/6

6:45 a.m.-1:08 p.m.

1 stop9h 23m

Seattle/Tacoma Intl

dom. 7/6

7:05 a.m.-12:42 a.m.

1 stop14h 37m

C$ 397

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mié. 3/6

6:45 a.m.-1:08 p.m.

1 stop9h 23m

Seattle/Tacoma Intl

dom. 7/6

7:05 a.m.-12:42 a.m.

1 stop14h 37m

C$ 397

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

sáb. 21/3

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

2 stops34h 34m

Seattle/Tacoma Intl

mar. 31/3

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

1 stop12h 55m

C$ 439

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mié. 18/3

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

2 stops34h 34m

Seattle/Tacoma Intl

jue. 26/3

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

1 stop12h 55m

C$ 439

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mié. 18/3

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

2 stops34h 34m

Seattle/Tacoma Intl

dom. 29/3

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

2 stops30h 28m

C$ 441

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mar. 2/6

5:30 p.m.-1:08 p.m.

1 stop22h 38m

Seattle/Tacoma Intl

dom. 7/6

7:05 a.m.-12:42 a.m.

1 stop14h 37m

C$ 450

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

vie. 5/6

6:45 a.m.-8:28 p.m.

1 stop16h 43m

Seattle/Tacoma Intl

lun. 8/6

7:05 a.m.-12:42 a.m.

1 stop14h 37m

C$ 450

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mié. 18/3

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

1 stop21h 49m

Seattle/Tacoma Intl

mar. 31/3

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

1 stop12h 55m

C$ 451

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

dom. 15/3

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

1 stop21h 49m

Seattle/Tacoma Intl

jue. 26/3

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

1 stop12h 55m

C$ 451

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

dom. 15/3

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

1 stop21h 49m

Seattle/Tacoma Intl

mar. 31/3

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

1 stop12h 55m

C$ 451

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/12

Showing 1-10 of 20 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 5 December 2025.

The best time to book flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle is 37 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, November is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle (average of C$ 280). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in January is currently the most expensive (average of C$ 508). 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 12 diciembre 2025.

It’s typically best to fly out from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in the evening. Doing so could potentially save you 52% on the flight price compared to flying at noon, which is usually more expensive.

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 12 diciembre 2025.
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
8,007 reviews
Check prices

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

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
8,007 reviews
Delta
7.9
Good
8,007 reviews
Check prices

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

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
9,095 reviews
Delta
7.9
Good
8,007 reviews
Check prices

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

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
7.2
Good
11,050 reviews
Delta
7.9
Good
8,007 reviews
Check prices

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

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
3,195 reviews
Delta
7.9
Good
8,007 reviews
Check prices

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

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
10,516 reviews
Delta
7.9
Good
8,007 reviews
Check prices

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

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 9h 23m. 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$ 258. Additional round-trip tickets that might be worth considering are offered by Delta and WestJet, with the lowest prices starting at C$ 280 and C$ 367, respectively. American Airlines is 61% 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$ 215. Users have also found prices from C$ 270 and C$ 283 on Air Canada and Delta, respectively.

  • 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 C$ 280). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in January is currently the most expensive (average of C$ 508). 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
Tukwila
Mukilteo
Tacoma
Bothell
Cashmere
Olympia
Renton
Marysville
Lynnwood

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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 12 diciembre 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 280AverageC$ 566FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 367AverageC$ 548FlexibilityNo cancel feeOn-time60%
Search WestJet flights
American AirlinesCheapestC$ 455AverageC$ 559FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 497AverageC$ 693FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 534AverageC$ 727FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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

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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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