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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle from $198

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 9/18. 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

Discover deals from 900+ travel sites with momondo.

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
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
$335WestJet
Thu, Oct 1 - Fri, Oct 9
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
$336WestJet
Sun, Sep 27 - Sun, Oct 4
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
$340WestJet
Sun, Sep 6 - Mon, Sep 14
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
10:30 am - 12:25 am
SEA
-
YUL
10h 55m
2 stops
$341WestJet
Thu, Sep 10 - Mon, Sep 21
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
10:30 am - 12:25 am
SEA
-
YUL
10h 55m
2 stops
$343WestJet
Sun, Sep 27 - Sun, Oct 4
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
10:30 am - 12:25 am
SEA
-
YUL
10h 55m
2 stops
$346WestJet
Thu, Oct 1 - Fri, Oct 9
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
10:30 am - 12:25 am
SEA
-
YUL
10h 55m
2 stops
$347WestJet
Thu, Oct 1 - Fri, Oct 9
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
$353WestJet
Thu, Aug 20 - Fri, Aug 28
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
$356WestJet
Thu, Sep 3 - Thu, Sep 10
WestJet Logo
7:15 am - 6:45 pm
YUL
-
SEA
14h 30m
1 stop
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
$357WestJet
Fri, Sep 18 - Sun, Sep 27

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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
Aug 24
YUL1:30 pmMontreal Pierre Elliott Trudeau Intl
12h 12m
2 stops
SEA10:42 pmSeattle/Tacoma Intl
Aug 31
SEA5:50 amSeattle/Tacoma Intl
11h 45m
2 stops
YUL8:35 pmMontreal Pierre Elliott Trudeau Intl
$360
Air Canada
Aug 25
YUL1:30 pmMontreal Pierre Elliott Trudeau Intl
12h 12m
2 stops
SEA10:42 pmSeattle/Tacoma Intl
Sep 1
SEA5:50 amSeattle/Tacoma Intl
11h 45m
2 stops
YUL8:35 pmMontreal Pierre Elliott Trudeau Intl
$370
Air Canada
Oct 28
YUL8:00 amMontreal Pierre Elliott Trudeau Intl
13h 22m
2 stops
SEA6:22 pmSeattle/Tacoma Intl
Oct 31
SEA10:10 amSeattle/Tacoma Intl
7h 56m
1 stop
YUL9:06 pmMontreal Pierre Elliott Trudeau Intl
$373

United Airlines flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle

Our best United Airlines deals on Montreal Pierre Elliott Trudeau Intl Airport to Seattle flight tickets
United Airlines
Aug 12
YUL9:45 amMontreal Pierre Elliott Trudeau Intl
9h 22m
1 stop
SEA4:07 pmSeattle/Tacoma Intl
Aug 24
SEA5:20 pmSeattle/Tacoma Intl
11h 56m
1 stop
YUL8:16 amMontreal Pierre Elliott Trudeau Intl
$400
United Airlines
Jun 27
YUL6:35 pmMontreal Pierre Elliott Trudeau Intl
9h 38m
1 stop
SEA1:13 amSeattle/Tacoma Intl
Jul 4
SEA5:00 amSeattle/Tacoma Intl
14h 06m
2 stops
YUL10:06 pmMontreal Pierre Elliott Trudeau Intl
$468
United Airlines
Jun 27
YUL6:00 amMontreal Pierre Elliott Trudeau Intl
9h 06m
1 stop
SEA12:06 pmSeattle/Tacoma Intl
Jun 29
SEA7:54 pmSeattle/Tacoma Intl
17h 16m
2 stops
YUL4:10 pmMontreal Pierre Elliott Trudeau Intl
$542

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 June 25, 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

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 10/1

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Fri 10/9

7:35 pm-7:05 am

1 stop8h 30m

$335

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 9/27

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Sun 10/4

7:35 pm-7:05 am

1 stop8h 30m

$336

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 9/6

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Mon 9/14

7:35 pm-7:05 am

1 stop8h 30m

$340

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 9/10

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Mon 9/21

10:30 am-12:25 am

2 stops10h 55m

$341

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 9/27

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Sun 10/4

10:30 am-12:25 am

2 stops10h 55m

$343

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 10/1

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Fri 10/9

10:30 am-12:25 am

2 stops10h 55m

$346

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 10/1

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Fri 10/9

10:30 am-12:25 am

2 stops10h 55m

$347

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 8/20

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Fri 8/28

7:35 pm-7:05 am

1 stop8h 30m

$353

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 9/3

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Thu 9/10

7:35 pm-7:05 am

1 stop8h 30m

$356
Quickest round-trip

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 9/18

7:15 am-6:45 pm

1 stop14h 30m

Seattle/Tacoma Intl

Sun 9/27

7:35 pm-7:05 am

1 stop8h 30m

$357

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, February 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 $417. If you don’t want to visit Seattle in February, then you should wait until January to fly from Montreal Pierre Elliott Trudeau Intl Airport, when ticket prices are also cheap, with an average price of $432.

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 Sunday. momondo users have found tickets for Sunday departures for as low as $315. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Wednesday 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 $638.

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 from Montreal Pierre Elliott Trudeau Intl Airport 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 $502 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 $304 on momondo.

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

There are 3 cabin classes available to choose from on Montreal Pierre Elliott Trudeau Intl Airport to Seattle 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 13% 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 June 2026, prices for Montreal Pierre Elliott Trudeau Intl Airport to Seattle flights are approximately 13% 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

Fastest flight time

8h 00m

Direct flights

None
The fastest flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle takes 8h 00m
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

Frequently asked questions about flying from Montreal Pierre Elliott Trudeau Intl Airport to Seattle

  • 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 8h 00m.

  • 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
United AirlinesPriceFrom $263Free CancellationRating
7.4
9,885 reviews
Search United Airlines flights
WestJetPriceFrom $293Free CancellationRating
7.2
3,384 reviews
Search WestJet flights
Air CanadaPriceFrom $304Free CancellationRating
7.1
11,254 reviews
Search Air Canada flights

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
Redmond
Kent
Lakewood
Puyallup
Tukwila
Federal Way
Fife
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Marysville
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Kirkland
Shoreline
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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