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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle from C$ 270

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle departing on 6/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
7:30 a.m. - 2:31 p.m.
YUL
-
SEA
10h 01m
1 stop
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 420WestJet
Sat, 25 Apr - Fri, 1 May
WestJet Logo
7:30 a.m. - 2:31 p.m.
YUL
-
SEA
10h 01m
1 stop
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 424WestJet
Sat, 25 Apr - Fri, 1 May
WestJet Logo
7:30 a.m. - 2:31 p.m.
YUL
-
SEA
10h 01m
1 stop
WestJet Logo
10:30 a.m. - 12:25 a.m.
SEA
-
YUL
10h 55m
2 stops
C$ 429WestJet
Sat, 25 Apr - Fri, 1 May
WestJet Logo
7:00 a.m. - 2:19 p.m.
YUL
-
SEA
10h 19m
1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.
SEA
-
YUL
12h 55m
1 stop
C$ 431WestJet
Sun, 5 Apr - Thu, 9 Apr
WestJet Logo
7:00 a.m. - 2:19 p.m.
YUL
-
SEA
10h 19m
1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.
SEA
-
YUL
12h 55m
1 stop
C$ 434WestJet
Sun, 5 Apr - Thu, 9 Apr
WestJet Logo
7:30 a.m. - 9:40 a.m.
YUL
-
SEA
29h 10m
1 stop
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 454WestJet
Sat, 25 Apr - Fri, 1 May
WestJet Logo
6:45 a.m. - 6:45 p.m.
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 460WestJet
Wed, 13 May - Sat, 23 May
WestJet Logo
6:45 a.m. - 6:45 p.m.
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 461WestJet
Wed, 13 May - Sat, 23 May
WestJet Logo
8:00 p.m. - 6:45 p.m.
YUL
-
SEA
25h 45m
1 stop
WestJet Logo
7:35 p.m. - 7:05 a.m.
SEA
-
YUL
8h 30m
1 stop
C$ 462WestJet
Sat, 25 Apr - Sat, 2 May
WestJet Logo
8:00 p.m. - 6:45 p.m.
YUL
-
SEA
25h 45m
1 stop
WestJet Logo
10:30 a.m. - 12:25 a.m.
SEA
-
YUL
10h 55m
2 stops
C$ 464WestJet
Sat, 25 Apr - Fri, 1 May

WestJet flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle

Our best WestJet deals on Montreal Pierre Elliott Trudeau Intl Airport to Seattle flight tickets
WestJet
5 Apr
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
10h 19m
1 stop
SEA2:19 p.m.Seattle/Tacoma Intl
9 Apr
SEA3:10 p.m.Seattle/Tacoma Intl
12h 55m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 431
WestJet
5 Apr
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
10h 19m
1 stop
SEA2:19 p.m.Seattle/Tacoma Intl
9 Apr
SEA3:10 p.m.Seattle/Tacoma Intl
12h 55m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 434
WestJet
25 Apr
YUL7:30 a.m.Montreal Pierre Elliott Trudeau Intl
29h 10m
1 stop
SEA9:40 a.m.Seattle/Tacoma Intl
1 May
SEA7:35 p.m.Seattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 454

Delta flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle

Our best Delta deals on Montreal Pierre Elliott Trudeau Intl Airport to Seattle flight tickets
Delta
18 Apr
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
12h 40m
2 stops
SEA4:40 p.m.Seattle/Tacoma Intl
25 Apr
SEA8:50 a.m.Seattle/Tacoma Intl
11h 36m
2 stops
YUL11:26 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 545
Delta
31 Mar
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
8h 18m
1 stop
SEA12:18 p.m.Seattle/Tacoma Intl
9 Jun
SEA11:25 a.m.Seattle/Tacoma Intl
9h 34m
1 stop
YUL11:59 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 919
Delta
5 Apr
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
8h 18m
1 stop
SEA12:18 p.m.Seattle/Tacoma Intl
9 Jun
SEA11:10 p.m.Seattle/Tacoma Intl
16h 44m
2 stops
YUL6:54 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 936

momondo Fare Finder

 
Customize your flight search to find flights from Montreal Pierre Elliott Trudeau Intl Airport 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, momondo users made 96,600 searches. Data last updated 24 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
Quickest round-trip

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 25/4

7:30 a.m.-2:31 p.m.

1 stop10h 01m

Seattle/Tacoma Intl

Fri 1/5

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

1 stop8h 30m

C$ 420

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 25/4

7:30 a.m.-2:31 p.m.

1 stop10h 01m

Seattle/Tacoma Intl

Fri 1/5

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

1 stop8h 30m

C$ 424

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 25/4

7:30 a.m.-2:31 p.m.

1 stop10h 01m

Seattle/Tacoma Intl

Fri 1/5

10:30 a.m.-12:25 a.m.

2 stops10h 55m

C$ 429

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 5/4

7:00 a.m.-2:19 p.m.

1 stop10h 19m

Seattle/Tacoma Intl

Thu 9/4

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

1 stop12h 55m

C$ 431

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 5/4

7:00 a.m.-2:19 p.m.

1 stop10h 19m

Seattle/Tacoma Intl

Thu 9/4

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

1 stop12h 55m

C$ 434

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 25/4

7:30 a.m.-9:40 a.m.

1 stop29h 10m

Seattle/Tacoma Intl

Fri 1/5

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

1 stop8h 30m

C$ 454

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

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

1 stop8h 30m

C$ 460

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

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

1 stop8h 30m

C$ 461

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 25/4

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

1 stop25h 45m

Seattle/Tacoma Intl

Sat 2/5

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

1 stop8h 30m

C$ 462

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 25/4

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

1 stop25h 45m

Seattle/Tacoma Intl

Fri 1/5

10:30 a.m.-12:25 a.m.

2 stops10h 55m

C$ 464

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Montreal Pierre Elliott Trudeau Intl Airport to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Montreal Pierre Elliott Trudeau Intl Airport and Seattle?

What is the cheapest month to fly to Seattle?

If you aren’t able to travel to Seattle during the month of February, then flying in June is also cheap. Prices for this month can be found on momondo for an average of C$ 590.

What is the cheapest day to depart on your flight to Seattle?

Our data shows that Wednesday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 666. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around C$ 726. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

What is the cheapest Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl flight route?

Fly from Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl for the best Montreal Pierre Elliott Trudeau Intl - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Montreal Pierre Elliott Trudeau Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around C$ 645 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Montreal Pierre Elliott Trudeau Intl Airport for as low as C$ 420 on momondo.

What cabin class options are available on Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl flights?

There is only 1 cabin class available to choose from on Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Montreal Pierre Elliott Trudeau Intl Airport to Seattle flights?

You could potentially save up to 27% on your flight if you consider stops on a Montreal Pierre Elliott Trudeau Intl Airport to Seattle flight.

How have Montreal Pierre Elliott Trudeau Intl Airport to Seattle flight prices changed over time?

As of March 2026, prices for Montreal Pierre Elliott Trudeau Intl Airport to Seattle flights are approximately 14% more expensive when compared to flights at the same time last year.

When to book flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Montreal Pierre Elliott Trudeau Intl Airport to Seattle (YUL to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle

Fastest flight time

8h 10m

Direct flights

None
The fastest flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle takes 8h 10m
There are no direct flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle. There are no popular flight routes from Montreal Pierre Elliott Trudeau Intl Airport to Seattle.
Search flight deals

  • How far is Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl by plane?

    Seattle/Tacoma Intl is 3660.5 km away from Montreal Pierre Elliott Trudeau Intl. In terms of flight time, this usually takes a little over 8h 10m.

  • When did momondo last update prices for flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle/Tacoma Intl Airport are updated daily.

  • How many operators does momondo search for flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle/Tacoma Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Montreal Pierre Elliott Trudeau Intl Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

  • What is the most popular airline from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

Best airlines flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle

Compare and see reviews for airlines that fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom C$ 256Free CancellationRating
7.1
11,491 reviews
Search American Airlines flights
DeltaPriceFrom C$ 279Free CancellationRating
7.9
8,321 reviews
Search Delta flights
WestJetPriceFrom C$ 355Free CancellationRating
7.2
3,300 reviews
Search WestJet flights
United AirlinesPriceFrom C$ 462Free CancellationRating
7.4
9,470 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 492Free CancellationRating
7.1
10,836 reviews
Search Air Canada flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Lynnwood
Leavenworth
SeaTac
Tacoma
Marysville
Redmond
Kirkland
Puyallup
Tukwila
Olympia
Ocean Shores
Ellensburg
Bainbridge Island
Gig Harbor
Renton
Centralia
Kent
Edmonds
Federal Way
Shelton

Why use momondo?

Why should I use momondo to find a flight deal from Montreal to Seattle?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from Montreal.

Can I find flights from Montreal to Seattle with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Seattle from Montreal with this policy.

How can momondo help me find flights from Montreal to Seattle?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Montreal.

I’m not ready to book a flight from Montreal to Seattle right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Montreal to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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