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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle from C$ 232

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 14/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
4:15 p.m. - 2:19 p.m.YUL-SEA
25h 04m1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
C$ 357WestJet
Find Deal
Tue, 24 Feb - Thu, 26 Feb
WestJet Logo
7:30 p.m. - 2:20 p.m.YUL-SEA
21h 50m1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
C$ 396WestJet
Find Deal
Sun, 25 Jan - Thu, 29 Jan
WestJet Logo
6:45 a.m. - 2:19 p.m.YUL-SEA
34h 34m2 stops
WestJet Logo
3:10 p.m. - 3:13 p.m.SEA-YUL
21h 03m1 stop
C$ 399WestJet
Find Deal
Sat, 14 Mar - Sun, 22 Mar
WestJet Logo
7:30 p.m. - 2:20 p.m.YUL-SEA
21h 50m1 stop
WestJet Logo
3:10 p.m. - 3:12 p.m.SEA-YUL
21h 02m1 stop
C$ 400WestJet
Find Deal
Mon, 1 Dec - Sun, 7 Dec
WestJet Logo
4:15 p.m. - 2:20 p.m.YUL-SEA
25h 05m1 stop
WestJet Logo
3:10 p.m. - 3:12 p.m.SEA-YUL
21h 02m1 stop
C$ 403WestJet
Find Deal
Mon, 1 Dec - Sun, 7 Dec
WestJet Logo
6:45 a.m. - 2:20 p.m.YUL-SEA
34h 35m2 stops
WestJet Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
C$ 409WestJet
Find Deal
Sun, 25 Jan - Thu, 29 Jan
WestJet Logo
6:45 a.m. - 2:20 p.m.YUL-SEA
34h 35m2 stops
WestJet Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
C$ 410WestJet
Find Deal
Mon, 1 Dec - Sun, 7 Dec
WestJet Logo
7:30 p.m. - 2:20 p.m.YUL-SEA
21h 50m1 stop
WestJet Logo
3:10 p.m. - 3:12 p.m.SEA-YUL
21h 02m1 stop
C$ 411WestJet
Find Deal
Mon, 1 Dec - Sun, 7 Dec
Multiple Airlines Logo
6:00 p.m. - 2:20 p.m.YUL-SEA
23h 20m1 stop
Multiple Airlines Logo
11:55 a.m. - 4:27 p.m.SEA-YUL
25h 32m2 stops
C$ 470Multiple Airlines
Find Deal
Mon, 24 Nov - Sun, 30 Nov
Delta Logo
7:00 a.m. - 2:41 p.m.YUL-SEA
10h 41m2 stops
Delta Logo
9:35 p.m. - 11:59 a.m.SEA-YUL
11h 24m2 stops
C$ 525Delta
Find Deal
Wed, 5 Nov - Sat, 15 Nov

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
24 Feb
YUL4:15 p.m.Montreal Pierre Elliott Trudeau Intl
25h 04m
1 stop
SEA2:19 p.m.Seattle/Tacoma Intl
26 Feb
SEA3:10 p.m.Seattle/Tacoma Intl
12h 55m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 357
Find similar
WestJet
25 Jan
YUL7:30 p.m.Montreal Pierre Elliott Trudeau Intl
21h 50m
1 stop
SEA2:20 p.m.Seattle/Tacoma Intl
29 Jan
SEA3:10 p.m.Seattle/Tacoma Intl
12h 55m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 396
Find similar
WestJet
14 Mar
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
34h 34m
2 stops
SEA2:19 p.m.Seattle/Tacoma Intl
22 Mar
SEA3:10 p.m.Seattle/Tacoma Intl
21h 03m
1 stop
YUL3:13 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 399
Find similar

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
5 Nov
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
10h 41m
2 stops
SEA2:41 p.m.Seattle/Tacoma Intl
15 Nov
SEA9:35 p.m.Seattle/Tacoma Intl
11h 24m
2 stops
YUL11:59 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 525
Find similar
Delta
24 Oct
YUL2:25 p.m.Montreal Pierre Elliott Trudeau Intl
12h 32m
2 stops
SEA11:57 p.m.Seattle/Tacoma Intl
28 Oct
SEA9:25 a.m.Seattle/Tacoma Intl
10h 56m
1 stop
YUL11:21 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 765
Find similar
Delta
22 Oct
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
10h 41m
2 stops
SEA2:41 p.m.Seattle/Tacoma Intl
1 Nov
SEA9:25 a.m.Seattle/Tacoma Intl
10h 56m
1 stop
YUL11:21 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 845
Find similar

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 16 October 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

Fly to

Route

Depart

Return

Price

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 24/2

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

1 stop25h 04m

Seattle/Tacoma Intl

Thu 26/2

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

1 stop12h 55m

C$ 357

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 25/1

7:30 p.m.-2:20 p.m.

1 stop21h 50m

Seattle/Tacoma Intl

Thu 29/1

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

1 stop12h 55m

C$ 396

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 14/3

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

2 stops34h 34m

Seattle/Tacoma Intl

Sun 22/3

3:10 p.m.-3:13 p.m.

1 stop21h 03m

C$ 399

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 1/12

7:30 p.m.-2:20 p.m.

1 stop21h 50m

Seattle/Tacoma Intl

Sun 7/12

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

1 stop21h 02m

C$ 400

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 1/12

4:15 p.m.-2:20 p.m.

1 stop25h 05m

Seattle/Tacoma Intl

Sun 7/12

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

1 stop21h 02m

C$ 403

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 25/1

6:45 a.m.-2:20 p.m.

2 stops34h 35m

Seattle/Tacoma Intl

Thu 29/1

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

1 stop12h 55m

C$ 409

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 1/12

6:45 a.m.-2:20 p.m.

2 stops34h 35m

Seattle/Tacoma Intl

Sun 7/12

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

1 stop12h 55m

C$ 410

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 1/12

7:30 p.m.-2:20 p.m.

1 stop21h 50m

Seattle/Tacoma Intl

Sun 7/12

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

1 stop21h 02m

C$ 411

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 24/11

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

1 stop23h 20m

Seattle/Tacoma Intl

Sun 30/11

11:55 a.m.-4:27 p.m.

2 stops25h 32m

C$ 470

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 5/11

7:00 a.m.-2:41 p.m.

2 stops10h 41m

Seattle/Tacoma Intl

Sat 15/11

9:35 p.m.-11:59 a.m.

2 stops11h 24m

C$ 525

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 September, then flying in October is also cheap. Prices for this month can be found on momondo for an average of C$ 647.

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

Our data shows that Friday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 698. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 802. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

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

Our most recent data shows that the best time of day to fly to Seattle is in the evening. Flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle during this time can be as low as C$ 569. Flights at noon are often more expensive with an average ticket price of C$ 768.

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$ 706 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$ 505 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 October 2025, prices for Montreal Pierre Elliott Trudeau Intl Airport to Seattle flights are approximately 17% cheaper 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

Best price found

C$ 465

Direct flights

None
The best one-way flight to Seattle from Montreal Pierre Elliott Trudeau Intl Airport in the past 72 hours is C$ 465. The best round-trip flight deal from Montreal Pierre Elliott Trudeau Intl Airport to Seattle found on momondo in the last 72 hours is C$ 732.
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 10h 35m.

  • 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
WestJetPriceFrom C$ 374Free CancellationRating
7.2
3,127 reviews
Search WestJet flights
American AirlinesPriceFrom C$ 463Free CancellationRating
7.2
11,043 reviews
Search American Airlines flights
DeltaPriceFrom C$ 505Free CancellationRating
7.9
7,984 reviews
Search Delta flights
Air CanadaPriceFrom C$ 509Free CancellationRating
7.1
10,306 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 544Free CancellationRating
7.4
8,982 reviews
Search United Airlines flights

  • United Airlines Flights From Montreal Pierre Elliott Trudeau Intl Airport to Seattle

    United Airlines flies from Montreal Pierre Elliott Trudeau Intl Airport to Seattle around 4 times per week, with 8,982 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from Montreal Pierre Elliott Trudeau Intl Airport to Seattle in the last 72 hours was C$ 387 (round-trip), much lower than the average airfare cost of C$ 527 for United Airlines flights on this route.

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Lynnwood
Marysville
Tacoma
SeaTac
Kirkland
Olympia
Ocean Shores
Redmond
Shoreline
Ellensburg
Gig Harbor
Renton
Mukilteo
Centralia
Cle Elum
Federal Way
Poulsbo
Shelton
Lakewood

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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