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Cheap flights from Montreal to Seattle from $188

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 to Seattle departing on 6/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Montreal 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
$305WestJet
Tue, Jun 2 - Sat, Jun 6
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
$307WestJet
Wed, Jun 10 - Fri, Jun 12
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
$308WestJet
Wed, Jun 17 - Mon, Jun 22
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
$311WestJet
Wed, Jun 17 - Sun, Jun 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
$313WestJet
Thu, Jun 18 - Tue, Jun 23
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
$314WestJet
Fri, Jun 5 - Sat, Jun 13
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
$323WestJet
Thu, Jun 18 - Sun, Jun 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
$324WestJet
Wed, Jun 10 - Fri, Jun 12
WestJet Logo
8:00 pm - 9:40 am
YUL
-
SEA
16h 40m
1 stop
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
$329WestJet
Mon, May 4 - Mon, May 11
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
$332WestJet
Wed, Apr 29 - Thu, Apr 30

WestJet flights from Montreal to Seattle

Our best WestJet deals on Montreal to Seattle flight tickets
WestJet
Jun 2
YUL6:45 amMontreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 pmSeattle/Tacoma Intl
Jun 6
SEA7:35 pmSeattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 amMontreal Pierre Elliott Trudeau Intl
$305
WestJet
Jun 17
YUL6:45 amMontreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 pmSeattle/Tacoma Intl
Jun 22
SEA7:35 pmSeattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 amMontreal Pierre Elliott Trudeau Intl
$307
WestJet
Jun 17
YUL6:45 amMontreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 pmSeattle/Tacoma Intl
Jun 22
SEA7:35 pmSeattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 amMontreal Pierre Elliott Trudeau Intl
$308

United Airlines flights from Montreal to Seattle

Our best United Airlines deals on Montreal to Seattle flight tickets
United Airlines
Apr 16
YUL9:45 amMontreal Pierre Elliott Trudeau Intl
9h 52m
1 stop
SEA4:37 pmSeattle/Tacoma Intl
Apr 18
SEA5:00 amSeattle/Tacoma Intl
14h 06m
2 stops
YUL10:06 pmMontreal Pierre Elliott Trudeau Intl
$447
United Airlines
Apr 21
YUL6:10 amMontreal Pierre Elliott Trudeau Intl
15h 25m
2 stops
SEA6:35 pmSeattle/Tacoma Intl
Apr 22
SEA7:05 pmSeattle/Tacoma Intl
18h 05m
2 stops
YUL4:10 pmMontreal Pierre Elliott Trudeau Intl
$461
United Airlines
Apr 15
YUL6:10 amMontreal Pierre Elliott Trudeau Intl
15h 50m
1 stop
SEA7:00 pmSeattle/Tacoma Intl
Apr 21
SEA11:59 pmSeattle/Tacoma Intl
7h 41m
1 stop
YUL10:40 amMontreal Pierre Elliott Trudeau Intl
$521

momondo Fare Finder

 
Customize your flight search to find flights from Montreal 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 April 7, 2026.
Use the filters below to find and compare flights from Montreal 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

Tue 6/2

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Sat 6/6

7:35 pm-7:05 am

1 stop8h 30m

$305

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 6/10

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Fri 6/12

7:35 pm-7:05 am

1 stop8h 30m

$307

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 6/17

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Mon 6/22

7:35 pm-7:05 am

1 stop8h 30m

$308

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 6/17

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Sun 6/21

10:30 am-12:25 am

2 stops10h 55m

$311

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 6/18

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Tue 6/23

10:30 am-12:25 am

2 stops10h 55m

$313

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Fri 6/5

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Sat 6/13

7:35 pm-7:05 am

1 stop8h 30m

$314

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 6/18

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Sun 6/21

10:30 am-12:25 am

2 stops10h 55m

$323

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 6/10

6:45 am-6:45 pm

2 stops15h 00m

Seattle/Tacoma Intl

Fri 6/12

10:30 am-12:25 am

2 stops10h 55m

$324

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 5/4

8:00 pm-9:40 am

1 stop16h 40m

Seattle/Tacoma Intl

Mon 5/11

7:35 pm-7:05 am

1 stop8h 30m

$329
Quickest round-trip

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 4/29

7:15 am-6:45 pm

1 stop14h 30m

Seattle/Tacoma Intl

Thu 4/30

7:35 pm-7:05 am

1 stop8h 30m

$332

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 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 and Seattle?

What is the cheapest month to fly to Seattle?

In general, April is the cheapest month to fly from Montreal to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $321. If you don’t want to visit Seattle in April, then you should wait until March to fly from Montreal, when ticket prices are also cheap, with an average price of $442.

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

On average, the least expensive day to fly to Seattle from Montreal 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, Wednesday is the most expensive day to depart from Montreal because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $606.

What is the cheapest Montreal to Seattle/Tacoma Intl flight route?

Fly from Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl for the best Montreal - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $476 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Montreal for as low as $411 on momondo.

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

There are 3 cabin classes available to choose from on Montreal 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 to Seattle flights?

No. A direct flight is the cheapest option for a flight between Montreal to Seattle.

How have Montreal to Seattle flight prices changed over time?

As of April 2026, prices for Montreal to Seattle flights are approximately 15% cheaper when compared to flights at the same time last year.

When to book flights from Montreal to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Montreal to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Montreal to Seattle (YMQ to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Montreal to Seattle

Fastest flight time

8h 54m

Direct flights

None
The fastest flight from Montreal to Seattle takes 8h 54m
There are no direct flights from Montreal to Seattle. There are no popular flight routes from Montreal to Seattle.
Search flight deals

Frequently asked questions about flying from Montreal to Seattle

  • How far is Montreal to Seattle/Tacoma Intl by plane?

    Montreal and Seattle/Tacoma Intl are 2282.0 mi apart from one another. Typically, this will take 8h 54m by plane in normal conditions.

  • When did momondo last update prices for flights from Montreal to Seattle/Tacoma Intl Airport?

    Prices for flights from Montreal to Seattle/Tacoma Intl Airport are updated daily.

  • How many operators does momondo search for flights from Montreal to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Montreal 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 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 to Seattle?

  • What is the most popular airline from Montreal to Seattle?

Best airlines flying from Montreal to Seattle

Compare and see reviews for airlines that fly from Montreal to Seattle with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom $209Free CancellationRating
7.2
3,316 reviews
Search WestJet flights
Air CanadaPriceFrom $314Free CancellationRating
7.1
10,897 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
Marysville
Puyallup
Lakewood
Cle Elum
Tukwila
Federal Way
Centralia
Fife
Westport
Tumwater
Shoreline

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 all potential Montreal to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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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