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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle from $165

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 1/14. 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 pm - 2:19 pmYUL-SEA
25h 04m1 stop
WestJet Logo
3:10 pm - 7:05 amSEA-YUL
12h 55m1 stop
$254WestJet
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Tue, Feb 24 - Thu, Feb 26
WestJet Logo
7:30 pm - 2:20 pmYUL-SEA
21h 50m1 stop
WestJet Logo
3:10 pm - 7:05 amSEA-YUL
12h 55m1 stop
$282WestJet
Find Deal
Sun, Jan 25 - Thu, Jan 29
WestJet Logo
6:45 am - 2:19 pmYUL-SEA
34h 34m2 stops
WestJet Logo
3:10 pm - 3:13 pmSEA-YUL
21h 03m1 stop
$284WestJet
Find Deal
Sat, Mar 14 - Sun, Mar 22
WestJet Logo
7:30 pm - 2:20 pmYUL-SEA
21h 50m1 stop
WestJet Logo
3:10 pm - 3:12 pmSEA-YUL
21h 02m1 stop
$285WestJet
Find Deal
Mon, Dec 1 - Sun, Dec 7
WestJet Logo
4:15 pm - 2:20 pmYUL-SEA
25h 05m1 stop
WestJet Logo
3:10 pm - 3:12 pmSEA-YUL
21h 02m1 stop
$287WestJet
Find Deal
Mon, Dec 1 - Sun, Dec 7
WestJet Logo
6:45 am - 2:20 pmYUL-SEA
34h 35m2 stops
WestJet Logo
3:10 pm - 7:05 amSEA-YUL
12h 55m1 stop
$291WestJet
Find Deal
Sun, Jan 25 - Thu, Jan 29
WestJet Logo
6:45 am - 2:20 pmYUL-SEA
34h 35m2 stops
WestJet Logo
3:10 pm - 7:05 amSEA-YUL
12h 55m1 stop
$292WestJet
Find Deal
Mon, Dec 1 - Sun, Dec 7
WestJet Logo
7:30 pm - 2:20 pmYUL-SEA
21h 50m1 stop
WestJet Logo
3:10 pm - 3:12 pmSEA-YUL
21h 02m1 stop
$293WestJet
Find Deal
Mon, Dec 1 - Sun, Dec 7
Multiple Airlines Logo
6:00 pm - 2:20 pmYUL-SEA
23h 20m1 stop
Multiple Airlines Logo
11:55 am - 4:27 pmSEA-YUL
25h 32m2 stops
$335Multiple Airlines
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Mon, Nov 24 - Sun, Nov 30
Delta Logo
7:00 am - 2:41 pmYUL-SEA
10h 41m2 stops
Delta Logo
9:35 pm - 11:59 amSEA-YUL
11h 24m2 stops
$374Delta
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Wed, Nov 5 - Sat, Nov 15

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
Feb 24
YUL4:15 pmMontreal Pierre Elliott Trudeau Intl
25h 04m
1 stop
SEA2:19 pmSeattle/Tacoma Intl
Feb 26
SEA3:10 pmSeattle/Tacoma Intl
12h 55m
1 stop
YUL7:05 amMontreal Pierre Elliott Trudeau Intl
$254
Find similar
WestJet
Jan 25
YUL7:30 pmMontreal Pierre Elliott Trudeau Intl
21h 50m
1 stop
SEA2:20 pmSeattle/Tacoma Intl
Jan 29
SEA3:10 pmSeattle/Tacoma Intl
12h 55m
1 stop
YUL7:05 amMontreal Pierre Elliott Trudeau Intl
$282
Find similar
WestJet
Mar 14
YUL6:45 amMontreal Pierre Elliott Trudeau Intl
34h 34m
2 stops
SEA2:19 pmSeattle/Tacoma Intl
Mar 22
SEA3:10 pmSeattle/Tacoma Intl
21h 03m
1 stop
YUL3:13 pmMontreal Pierre Elliott Trudeau Intl
$284
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
Nov 5
YUL7:00 amMontreal Pierre Elliott Trudeau Intl
10h 41m
2 stops
SEA2:41 pmSeattle/Tacoma Intl
Nov 15
SEA9:35 pmSeattle/Tacoma Intl
11h 24m
2 stops
YUL11:59 amMontreal Pierre Elliott Trudeau Intl
$374
Find similar
Delta
Oct 30
YUL6:00 amMontreal Pierre Elliott Trudeau Intl
11h 35m
1 stop
SEA2:35 pmSeattle/Tacoma Intl
Nov 10
SEA9:43 amSeattle/Tacoma Intl
10h 59m
2 stops
YUL11:42 pmMontreal Pierre Elliott Trudeau Intl
$407
Find similar
Delta
Oct 30
YUL7:00 amMontreal Pierre Elliott Trudeau Intl
12h 27m
1 stop
SEA4:27 pmSeattle/Tacoma Intl
Nov 5
SEA11:40 amSeattle/Tacoma Intl
8h 41m
2 stops
YUL11:21 pmMontreal Pierre Elliott Trudeau Intl
$433
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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 832,500 searches. Data last updated October 16, 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 2/24

4:15 pm-2:19 pm

1 stop25h 04m

Seattle/Tacoma Intl

Thu 2/26

3:10 pm-7:05 am

1 stop12h 55m

$254

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 1/25

7:30 pm-2:20 pm

1 stop21h 50m

Seattle/Tacoma Intl

Thu 1/29

3:10 pm-7:05 am

1 stop12h 55m

$282

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 3/14

6:45 am-2:19 pm

2 stops34h 34m

Seattle/Tacoma Intl

Sun 3/22

3:10 pm-3:13 pm

1 stop21h 03m

$284

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 12/1

7:30 pm-2:20 pm

1 stop21h 50m

Seattle/Tacoma Intl

Sun 12/7

3:10 pm-3:12 pm

1 stop21h 02m

$285

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 12/1

4:15 pm-2:20 pm

1 stop25h 05m

Seattle/Tacoma Intl

Sun 12/7

3:10 pm-3:12 pm

1 stop21h 02m

$287

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 1/25

6:45 am-2:20 pm

2 stops34h 35m

Seattle/Tacoma Intl

Thu 1/29

3:10 pm-7:05 am

1 stop12h 55m

$291

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 12/1

6:45 am-2:20 pm

2 stops34h 35m

Seattle/Tacoma Intl

Sun 12/7

3:10 pm-7:05 am

1 stop12h 55m

$292

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 12/1

7:30 pm-2:20 pm

1 stop21h 50m

Seattle/Tacoma Intl

Sun 12/7

3:10 pm-3:12 pm

1 stop21h 02m

$293

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 11/24

6:00 pm-2:20 pm

1 stop23h 20m

Seattle/Tacoma Intl

Sun 11/30

11:55 am-4:27 pm

2 stops25h 32m

$335

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 11/5

7:00 am-2:41 pm

2 stops10h 41m

Seattle/Tacoma Intl

Sat 11/15

9:35 pm-11:59 am

2 stops11h 24m

$374

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?

In general, September is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $452. If you don’t want to visit Seattle in September, then you should wait until October to fly from Montreal Pierre Elliott Trudeau Intl Airport, when ticket prices are also cheap, with an average price of $461.

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

On average, the least expensive day to fly to Seattle from Montreal Pierre Elliott Trudeau Intl Airport is on a Monday. momondo users have found tickets for Monday departures for as low as $282. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Tuesday is the most expensive day to depart from Montreal Pierre Elliott Trudeau Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $475.

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

Flying to Seattle from Montreal Pierre Elliott Trudeau Intl Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $360 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the morning, with an average ticket price of $503. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 $503 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 $360 on momondo.

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

There are 3 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.

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

$211

Direct flights

None
The best one-way flight to Seattle from Montreal Pierre Elliott Trudeau Intl Airport in the past 72 hours is $211. The best round-trip flight deal from Montreal Pierre Elliott Trudeau Intl Airport to Seattle found on momondo in the last 72 hours is $532.
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?

    A flight from Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl will travel around 2274.5 mi. 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 refreshed on a daily basis.

  • 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 you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • 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 $270Free CancellationRating
7.2
3,127 reviews
Search WestJet flights
Air CanadaPriceFrom $316Free CancellationRating
7.1
10,306 reviews
Search Air Canada flights
United AirlinesPriceFrom $516Free CancellationRating
7.4
8,982 reviews
Search United Airlines flights

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

    United Airlines is one of the most popular airlines flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle, operating 4 flights/week on average for this route. A good United Airlines flight deal for Montreal Pierre Elliott Trudeau Intl Airport to Seattle starts from $516 round-trip, up to an average price of $890. Our users have rated United Airlines at 7.4/10.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Marysville
Puyallup
Federal Way
Tukwila
Lakewood
Kirkland
Fife
Centralia
Shoreline
Cle Elum
Redmond
Westport

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Montreal to Seattle. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Montreal to Seattle flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Montreal and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Montreal to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.

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