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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle from C$ 237

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — SEA
17 Jun — 24 Jun1
1 adult

Cheapflights Tip: The best prices from Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl are usually found in October or August, booked 37 days in advance, depart on a Friday or Saturday and return on a Wednesday

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 12 June 2025.

Round-trip from

C$ 492

One-way from

C$ 252

Popular in

December

Cheapest in

October

Average price

C$ 671

Good round-trip deal

C$ 606 or less

Good one-way deal

C$ 339 or less
Air Canada
  • Air Canada
  • 4/9-5/9
  • 3 total stops
  • 23h 01m total
  • Montreal to Seattle
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WestJet
  • WestJet
  • 10/8
  • 1 total stop
  • 8h 58m total
  • Montreal to Seattle
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Highest demand for flights based on searches. 6% potential increase in price (C$ 65 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 25 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl.
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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 12 June 2025.

Thu 4/97:30 a.m.YUL - SEA
1 stop9h 46mAir Canada
Fri 5/92:55 p.m.SEA - YUL
2 stops13h 15mAir Canada
Deal found 12/6C$ 492
Tue 22/75:30 p.m.YUL - SEA
1 stop29h 58mWestJet
Tue 29/72:05 p.m.SEA - YUL
1 stop7h 38mWestJet
Deal found 11/6C$ 495
Tue 9/96:00 a.m.YUL - SEA
2 stops12h 52mUnited Airlines
Fri 12/97:34 p.m.SEA - YUL
2 stops12h 06mUnited Airlines
Deal found 10/6C$ 498
Thu 4/912:30 p.m.YUL - SEA
2 stops11h 49mAmerican Airlines
Mon 8/95:43 p.m.SEA - YUL
2 stops19h 47mAmerican Airlines
Deal found 12/6C$ 500
Sat 30/812:55 p.m.YUL - SEA
2 stops20h 40mDelta
Sun 7/97:10 a.m.SEA - YUL
2 stops13h 18mDelta
Deal found 12/6C$ 593
Tue 22/73:10 p.m.YUL - SEA
2 stops28h 15mMultiple Airlines
Tue 29/75:30 p.m.SEA - YUL
3 stops28h 07mMultiple Airlines
Deal found 11/6C$ 611

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 June 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

Thu 4/9

4:45 p.m.-7:31 p.m.

Nonstop5h 46m

Seattle/Tacoma Intl

Sun 7/9

7:15 a.m.-3:28 p.m.

Nonstop5h 13m

C$ 492

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 22/7

5:30 p.m.-8:28 p.m.

1 stop29h 58m

Seattle/Tacoma Intl

Tue 29/7

2:05 p.m.-12:43 a.m.

1 stop7h 38m

C$ 495

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 9/9

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

2 stops12h 52m

Seattle/Tacoma Intl

Fri 12/9

7:34 p.m.-10:40 a.m.

2 stops12h 06m

C$ 498

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 4/9

12:30 p.m.-9:19 p.m.

2 stops11h 49m

Seattle/Tacoma Intl

Mon 8/9

5:43 p.m.-4:30 p.m.

2 stops19h 47m

C$ 500

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 30/8

12:55 p.m.-6:35 a.m.

2 stops20h 40m

Seattle/Tacoma Intl

Sun 7/9

7:10 a.m.-11:28 p.m.

2 stops13h 18m

C$ 593

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 22/7

3:10 p.m.-4:25 p.m.

2 stops28h 15m

Seattle/Tacoma Intl

Tue 29/7

5:30 p.m.-12:37 a.m.

3 stops28h 07m

C$ 611

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 12/9

7:00 a.m.-12:59 p.m.

1 stop8h 59m

C$ 237

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 8/10

4:45 p.m.-7:31 p.m.

Nonstop5h 46m

C$ 275

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 27/9

9:45 a.m.-3:45 p.m.

1 stop9h 00m

C$ 282

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 7/7

8:10 a.m.-3:03 p.m.

2 stops33h 53m

C$ 290

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/6

Showing 1-10 of 11 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 9 June 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, January is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle (average of C$ 261). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in December is currently the most expensive (average of C$ 353). 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 June 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 53% on the flight price compared to flying at noon, which is usually more expensive.

Weekly flight availability from Montreal Pierre Elliott Trudeau Intl Airport to Seattle

Explore weekly flight availability from Pierre Elliott Trudeau Intl to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 12 June 2025.

The most flights from YUL to SEA are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 June 2025.
Get a feel of what it's like to fly with Delta, United Airlines and American Airlines from Montreal 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.
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
WestJet
7.2
Good
2,868 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,531 reviews
Delta
8.0
Very good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 2 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.

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

    Flying on Air Canada is currently your cheapest option to Seattle, with prices starting at C$ 492. Additional round-trip tickets that might be worth considering are offered by WestJet and United Airlines, with the lowest prices starting at C$ 495 and C$ 498, respectively. Air Canada is 28% 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$ 252. Users have also found prices from C$ 288 and C$ 308 on Air Canada and United Airlines, 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$ 568, our data indicates the cheapest price to be C$ 303. The most popular route (Montreal Pierre Elliott Trudeau Intl - Seattle/Tacoma Intl), is priced around C$ 498.

  • 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, January is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle (average of C$ 261). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in December is currently the most expensive (average of C$ 353). 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 Montreal Pierre Elliott Trudeau Intl Airport?

Book flights to Montreal Pierre Elliott Trudeau Intl Airport if you plan to visit one of these locations
Leavenworth
Tukwila
SeaTac
Tacoma
Marysville
Bothell
Renton
Olympia
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
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 12 June 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 357AverageC$ 551FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 492AverageC$ 621FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapestC$ 503AverageC$ 708FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 524AverageC$ 691FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 529AverageC$ 722FlexibilityNo 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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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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