Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle from $172

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 9/16. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle (YUL-SEA)

Cheap round-trip flights

Air Canada Logo
4:45 pm - 7:31 pmYUL-SEA
5h 46mnonstop
Air Canada Logo
2:55 pm - 7:10 amSEA-YUL
13h 15m2 stops
$382Air Canada
Find Deal
lun., sep. 8 - dom., sep. 14
Logo
7:00 am - 2:59 pmYUL-SEA
10h 59m1 stop
Logo
2:05 pm - 12:41 amSEA-YUL
7h 36m1 stop
$383
Find Deal
mié., oct. 1 - mar., oct. 14
Logo
7:00 am - 2:59 pmYUL-SEA
10h 59m1 stop
Logo
1:50 pm - 12:41 amSEA-YUL
7h 51m1 stop
$384
Find Deal
mié., sep. 24 - mié., oct. 8
Logo
8:10 am - 2:59 pmYUL-SEA
9h 49m1 stop
Logo
2:05 pm - 12:41 amSEA-YUL
7h 36m1 stop
$385
Find Deal
vie., sep. 26 - dom., oct. 12
WestJet Logo
5:30 pm - 7:14 pmYUL-SEA
28h 44m1 stop
WestJet Logo
2:05 pm - 12:41 amSEA-YUL
7h 36m1 stop
$388WestJet
Find Deal
vie., oct. 3 - lun., oct. 13
WestJet Logo
5:30 pm - 7:14 pmYUL-SEA
28h 44m1 stop
WestJet Logo
7:05 am - 12:27 amSEA-YUL
14h 22m2 stops
$392WestJet
Find Deal
vie., oct. 3 - mar., oct. 14
United Airlines Logo
9:15 am - 8:44 pmYUL-SEA
14h 29m1 stop
United Airlines Logo
5:31 pm - 10:40 amSEA-YUL
14h 09m2 stops
$406United Airlines
Find Deal
mié., oct. 1 - mar., oct. 14
American Airlines Logo
7:50 am - 6:28 pmYUL-SEA
13h 38m2 stops
American Airlines Logo
6:00 am - 10:42 pmSEA-YUL
13h 42m1 stop
$409American Airlines
Find Deal
lun., sep. 8 - dom., sep. 14
American Airlines Logo
2:31 pm - 10:29 pmYUL-SEA
10h 58m1 stop
American Airlines Logo
11:49 pm - 2:49 pmSEA-YUL
12h 00m1 stop
$415American Airlines
Find Deal
mié., sep. 10 - jue., sep. 18
Delta Logo
6:00 am - 10:36 amYUL-SEA
7h 36m1 stop
Delta Logo
9:25 am - 11:18 pmSEA-YUL
10h 53m2 stops
$433Delta
Find Deal
mié., sep. 24 - mié., oct. 1

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
Sep 8
YUL4:45 pmMontreal Pierre Elliott Trudeau Intl
5h 46m
SEA7:31 pmSeattle/Tacoma Intl
Sep 14
SEA2:55 pmSeattle/Tacoma Intl
13h 15m
2 stops
YUL7:10 amMontreal Pierre Elliott Trudeau Intl
$382
Find similar
Air Canada
Aug 31
YUL5:45 pmMontreal Pierre Elliott Trudeau Intl
6h 00m
SEA8:45 pmSeattle/Tacoma Intl
Sep 3
SEA7:15 amSeattle/Tacoma Intl
5h 13m
YUL3:28 pmMontreal Pierre Elliott Trudeau Intl
$385
Find similar
Air Canada
Oct 8
YUL4:45 pmMontreal Pierre Elliott Trudeau Intl
5h 46m
SEA7:31 pmSeattle/Tacoma Intl
Oct 11
SEA7:15 amSeattle/Tacoma Intl
5h 13m
YUL3:28 pmMontreal Pierre Elliott Trudeau Intl
$386
Find similar

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
Oct 3
YUL5:30 pmMontreal Pierre Elliott Trudeau Intl
28h 44m
1 stop
SEA7:14 pmSeattle/Tacoma Intl
Oct 13
SEA2:05 pmSeattle/Tacoma Intl
7h 36m
1 stop
YUL12:41 amMontreal Pierre Elliott Trudeau Intl
$388
Find similar
WestJet
Oct 3
YUL5:30 pmMontreal Pierre Elliott Trudeau Intl
28h 44m
1 stop
SEA7:14 pmSeattle/Tacoma Intl
Oct 14
SEA7:05 amSeattle/Tacoma Intl
14h 22m
2 stops
YUL12:27 amMontreal Pierre Elliott Trudeau Intl
$392
Find similar
WestJet
Oct 1
YUL6:45 amMontreal Pierre Elliott Trudeau Intl
33h 14m
2 stops
SEA12:59 pmSeattle/Tacoma Intl
Oct 8
SEA1:50 pmSeattle/Tacoma Intl
31h 37m
2 stops
YUL12:27 amMontreal Pierre Elliott Trudeau Intl
$394
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 832,500 searches. Data last updated agosto 18, 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

lun. 9/8

4:45 pm-7:31 pm

Nonstop5h 46m

Seattle/Tacoma Intl

dom. 9/14

2:55 pm-7:10 am

2 stops13h 15m

$382

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mié. 10/1

7:00 am-2:59 pm

1 stop10h 59m

Seattle/Tacoma Intl

mar. 10/14

2:05 pm-12:41 am

1 stop7h 36m

$383

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mié. 9/24

7:00 am-2:59 pm

1 stop10h 59m

Seattle/Tacoma Intl

mié. 10/8

1:50 pm-12:41 am

1 stop7h 51m

$384

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

vie. 9/26

8:10 am-2:59 pm

1 stop9h 49m

Seattle/Tacoma Intl

dom. 10/12

2:05 pm-12:41 am

1 stop7h 36m

$385

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

vie. 10/3

5:30 pm-7:14 pm

1 stop28h 44m

Seattle/Tacoma Intl

lun. 10/13

2:05 pm-12:41 am

1 stop7h 36m

$388

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

vie. 10/3

5:30 pm-7:14 pm

1 stop28h 44m

Seattle/Tacoma Intl

mar. 10/14

7:05 am-12:27 am

2 stops14h 22m

$392

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mié. 10/1

9:15 am-8:44 pm

1 stop14h 29m

Seattle/Tacoma Intl

mar. 10/14

5:31 pm-10:40 am

2 stops14h 09m

$406

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

lun. 9/8

7:50 am-6:28 pm

2 stops13h 38m

Seattle/Tacoma Intl

dom. 9/14

6:00 am-10:42 pm

1 stop13h 42m

$409

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mié. 9/10

2:31 pm-10:29 pm

1 stop10h 58m

Seattle/Tacoma Intl

jue. 9/18

11:49 pm-2:49 pm

1 stop12h 00m

$415

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

mié. 9/24

6:00 am-10:36 am

1 stop7h 36m

Seattle/Tacoma Intl

mié. 10/1

9:25 am-11:18 pm

2 stops10h 53m

$433

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 cheapest month to fly to Seattle?

In general, August 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 $463. If you don’t want to visit Seattle in August, 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 $470.

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 $361 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 $505 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.

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

You could potentially save up to 5% 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

$172

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 $172. The best round-trip flight deal from Montreal Pierre Elliott Trudeau Intl Airport to Seattle found on momondo in the last 72 hours is $382.
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?

    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 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 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
3,018 reviews
Search WestJet flights
Air CanadaPriceFrom $358Free CancellationRating
7.1
9,992 reviews
Search Air Canada flights

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

    Air Canada is one of the most popular airlines flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle, operating 7 flights/week on average for this route. A good Air Canada flight deal for Montreal Pierre Elliott Trudeau Intl Airport to Seattle starts from $358 round-trip, up to an average price of $489. Our users have rated Air Canada at 7.1/10.

Traveling to a place near Seattle?

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

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.

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
sáb. 8/23
sáb. 8/30
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States