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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle from C$ 238

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 16/9. 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 (YUL-SEA)

Cheap round-trip flights

WestJet Logo
7:00 a.m. - 12:59 p.m.YUL-SEA
8h 59m1 stop
WestJet Logo
2:05 p.m. - 12:41 a.m.SEA-YUL
7h 36m1 stop
C$ 528WestJet
Find Deal
Thu, 2 Oct - Tue, 14 Oct
Logo
7:00 a.m. - 2:59 p.m.YUL-SEA
10h 59m1 stop
Logo
2:05 p.m. - 12:41 a.m.SEA-YUL
7h 36m1 stop
C$ 529
Find Deal
Wed, 1 Oct - Tue, 14 Oct
Logo
7:00 a.m. - 2:59 p.m.YUL-SEA
10h 59m1 stop
Logo
1:50 p.m. - 12:41 a.m.SEA-YUL
7h 51m1 stop
C$ 531
Find Deal
Wed, 24 Sep - Wed, 8 Oct
Air Canada Logo
4:45 p.m. - 7:31 p.m.YUL-SEA
5h 46mdirect
Air Canada Logo
7:15 a.m. - 3:28 p.m.SEA-YUL
5h 13mdirect
C$ 533Air Canada
Find Deal
Fri, 26 Sep - Sat, 4 Oct
Air Canada Logo
4:45 p.m. - 7:31 p.m.YUL-SEA
5h 46mdirect
Air Canada Logo
10:00 a.m. - 8:50 p.m.SEA-YUL
7h 50m1 stop
C$ 540Air Canada
Find Deal
Sat, 6 Sep - Sat, 18 Oct
United Airlines Logo
9:15 a.m. - 8:44 p.m.YUL-SEA
14h 29m1 stop
United Airlines Logo
5:31 p.m. - 10:40 a.m.SEA-YUL
14h 09m2 stops
C$ 561United Airlines
Find Deal
Wed, 1 Oct - Tue, 14 Oct
American Airlines Logo
2:31 p.m. - 10:29 p.m.YUL-SEA
10h 58m1 stop
American Airlines Logo
11:49 p.m. - 2:49 p.m.SEA-YUL
12h 00m1 stop
C$ 573American Airlines
Find Deal
Wed, 10 Sep - Thu, 18 Sep
American Airlines Logo
2:31 p.m. - 10:29 p.m.YUL-SEA
10h 58m1 stop
American Airlines Logo
11:49 p.m. - 2:49 p.m.SEA-YUL
12h 00m1 stop
C$ 575American Airlines
Find Deal
Wed, 10 Sep - Thu, 18 Sep
Delta Logo
6:00 a.m. - 10:36 a.m.YUL-SEA
7h 36m1 stop
Delta Logo
9:25 a.m. - 11:18 p.m.SEA-YUL
10h 53m2 stops
C$ 598Delta
Find Deal
Wed, 24 Sep - Wed, 1 Oct
United Airlines Logo
5:45 p.m. - 8:45 p.m.YUL-SEA
6h 00mdirect
United Airlines Logo
7:15 a.m. - 3:28 p.m.SEA-YUL
5h 13mdirect
C$ 622United Airlines
Find Deal
Sun, 31 Aug - Sun, 7 Sep

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
2 Oct
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
8h 59m
1 stop
SEA12:59 p.m.Seattle/Tacoma Intl
14 Oct
SEA2:05 p.m.Seattle/Tacoma Intl
7h 36m
1 stop
YUL12:41 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 528
Find similar
WestJet
3 Oct
YUL5:30 p.m.Montreal Pierre Elliott Trudeau Intl
28h 44m
1 stop
SEA7:14 p.m.Seattle/Tacoma Intl
13 Oct
SEA2:05 p.m.Seattle/Tacoma Intl
7h 36m
1 stop
YUL12:41 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 536
Find similar
WestJet
3 Oct
YUL5:30 p.m.Montreal Pierre Elliott Trudeau Intl
28h 44m
1 stop
SEA7:14 p.m.Seattle/Tacoma Intl
14 Oct
SEA7:05 a.m.Seattle/Tacoma Intl
14h 22m
2 stops
YUL12:27 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 542
Find similar

Air Canada flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle

Our best Air Canada deals on Montreal Pierre Elliott Trudeau Intl Airport to Seattle flight tickets
Air Canada
26 Sep
YUL4:45 p.m.Montreal Pierre Elliott Trudeau Intl
5h 46m
SEA7:31 p.m.Seattle/Tacoma Intl
4 Oct
SEA7:15 a.m.Seattle/Tacoma Intl
5h 13m
YUL3:28 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 533
Find similar
Air Canada
6 Sep
YUL4:45 p.m.Montreal Pierre Elliott Trudeau Intl
5h 46m
SEA7:31 p.m.Seattle/Tacoma Intl
18 Oct
SEA10:00 a.m.Seattle/Tacoma Intl
7h 50m
1 stop
YUL8:50 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 540
Find similar
Air Canada
6 Sep
YUL4:45 p.m.Montreal Pierre Elliott Trudeau Intl
5h 46m
SEA7:31 p.m.Seattle/Tacoma Intl
22 Oct
SEA2:55 p.m.Seattle/Tacoma Intl
13h 15m
2 stops
YUL7:10 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 547
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 18 August 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

Thu 2/10

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

1 stop8h 59m

Seattle/Tacoma Intl

Tue 14/10

2:05 p.m.-12:41 a.m.

1 stop7h 36m

C$ 528

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 1/10

7:00 a.m.-2:59 p.m.

1 stop10h 59m

Seattle/Tacoma Intl

Tue 14/10

2:05 p.m.-12:41 a.m.

1 stop7h 36m

C$ 529

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 24/9

7:00 a.m.-2:59 p.m.

1 stop10h 59m

Seattle/Tacoma Intl

Wed 8/10

1:50 p.m.-12:41 a.m.

1 stop7h 51m

C$ 531

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 26/9

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

Nonstop5h 46m

Seattle/Tacoma Intl

Sat 4/10

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

Nonstop5h 13m

C$ 533

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 6/9

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

Nonstop5h 46m

Seattle/Tacoma Intl

Sat 18/10

10:00 a.m.-8:50 p.m.

1 stop7h 50m

C$ 540

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 1/10

9:15 a.m.-8:44 p.m.

1 stop14h 29m

Seattle/Tacoma Intl

Tue 14/10

5:31 p.m.-10:40 a.m.

2 stops14h 09m

C$ 561

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 10/9

2:31 p.m.-10:29 p.m.

1 stop10h 58m

Seattle/Tacoma Intl

Thu 18/9

11:49 p.m.-2:49 p.m.

1 stop12h 00m

C$ 573

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 10/9

2:31 p.m.-10:29 p.m.

1 stop10h 58m

Seattle/Tacoma Intl

Thu 18/9

11:49 p.m.-2:49 p.m.

1 stop12h 00m

C$ 575

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 24/9

6:00 a.m.-10:36 a.m.

1 stop7h 36m

Seattle/Tacoma Intl

Wed 1/10

9:25 a.m.-11:18 p.m.

2 stops10h 53m

C$ 598

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 31/8

5:45 p.m.-8:45 p.m.

Nonstop6h 00m

Seattle/Tacoma Intl

Sun 7/9

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

Nonstop5h 13m

C$ 622

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 August, then flying in October is also cheap. Prices for this month can be found on momondo for an average of C$ 649.

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$ 670. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 790. 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$ 560. Flights at noon are often more expensive with an average ticket price of C$ 756.

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$ 698 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$ 497 on momondo.

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

There are 1 cabin classes 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 August 2025, prices for Montreal Pierre Elliott Trudeau Intl Airport to Seattle flights are approximately 1% 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$ 238

Fastest flight time

5h 46m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Montreal Pierre Elliott Trudeau Intl Airport in the past 72 hours is C$ 238. 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$ 528.
The fastest flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle takes 5h 46m
Direct flights go from Montreal Pierre Elliott Trudeau Intl Airport to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
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 5h 46m.

  • 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$ 368Free CancellationRating
7.2
3,018 reviews
Search WestJet flights
DeltaPriceFrom C$ 497Free CancellationRating
8.0
7,981 reviews
Search Delta flights
Air CanadaPriceFrom C$ 509Free CancellationRating
7.1
9,992 reviews
Search Air Canada flights
American AirlinesPriceFrom C$ 530Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom C$ 535Free CancellationRating
7.4
8,925 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 7 times per week, with 8,925 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$ 528 for United Airlines flights on this route.

  • Air Canada Flights From Montreal Pierre Elliott Trudeau Intl Airport to Seattle

    Across 9,992 Air Canada reviews on momondo, the average score is 7.1/10. Air Canada flies from Montreal Pierre Elliott Trudeau Intl Airport to Seattle about 7 times each week, with ticket deals ranging from C$ 368 to C$ 510. Price data is based on momondo searches in the last 72 hours.

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
Redmond
Olympia
Ocean Shores
Shoreline
Ellensburg
Tukwila
Gig Harbor
Renton
Mukilteo
Cle Elum
Poulsbo
Puyallup
Kent
Centralia

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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