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Cheap flights from Seattle to Montreal from $163

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Montreal departing on 9/12. 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 Seattle to Montreal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:35 pm - 7:05 amSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 30m1 stop Calgary
Multiple Airlines Logo
5:00 pm - 10:42 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
8h 42m1 stop Vancouver Intl
$357Multiple Airlines
Thu, Aug 27 - Wed, Sep 2
Multiple Airlines Logo
7:35 pm - 7:05 amSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 30m1 stop Calgary
Multiple Airlines Logo
9:00 am - 6:32 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
12h 32m2 stops Edmonton Vancouver Intl
$358Multiple Airlines
Thu, Aug 27 - Wed, Sep 2
Air Canada Logo
7:20 pm - 7:10 amSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 50m2 stops Vancouver Intl Edmonton
Air Canada Logo
9:00 am - 6:32 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
12h 32m2 stops Edmonton Vancouver Intl
$363Air Canada
Thu, Aug 27 - Wed, Sep 2
WestJet Logo
7:35 pm - 7:05 amSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 30m1 stop Calgary
WestJet Logo
6:45 am - 6:45 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
15h 00m2 stops Toronto Pearson Intl Calgary
$363WestJet
Thu, Sep 17 - Thu, Sep 24
Air Canada Logo
3:00 pm - 7:10 amSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
13h 10m2 stops Vancouver Intl Edmonton
Air Canada Logo
11:10 am - 6:32 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
10h 22m2 stops Toronto Pearson Intl Vancouver Intl
$364Air Canada
Wed, Sep 16 - Wed, Sep 23
WestJet Logo
7:35 pm - 7:05 amSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
8h 30m1 stop Calgary
WestJet Logo
6:45 am - 6:45 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
15h 00m2 stops Toronto Pearson Intl Calgary
$364WestJet
Thu, Oct 1 - Wed, Oct 7
United Airlines Logo
5:13 pm - 10:40 amSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
14h 27m1 stop Chicago O'Hare Intl
United Airlines Logo
11:23 am - 6:41 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
10h 18m1 stop Newark
$444United Airlines
Tue, Aug 18 - Wed, Aug 26
United Airlines Logo
5:13 pm - 10:40 amSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
14h 27m1 stop Chicago O'Hare Intl
United Airlines Logo
9:45 am - 4:07 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
9h 22m1 stop Chicago O'Hare Intl
$444United Airlines
Tue, Aug 18 - Tue, Aug 25
Delta Logo
9:10 am - 11:52 pmSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
11h 42m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:00 am - 4:44 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
12h 44m1 stop Atlanta Hartsfield-Jackson
$468Delta
Wed, Aug 19 - Sun, Aug 23
Delta Logo
9:10 am - 11:52 pmSEA  Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl
11h 42m1 stop Atlanta Hartsfield-Jackson
Delta Logo
12:44 pm - 11:57 pmYUL  Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl
14h 13m1 stop Atlanta Hartsfield-Jackson
$468Delta
Wed, Aug 19 - Tue, Aug 25

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WestJet flights from Seattle to Montreal

Our best WestJet deals on Seattle to Montreal flight tickets
WestJet
Oct 1
SEA10:30 amSeattle/Tacoma Intl
10h 55m
2 stops
YUL12:25 amMontreal Pierre Elliott Trudeau Intl
Oct 4
YUL6:45 amMontreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 pmSeattle/Tacoma Intl
$372
WestJet
Oct 4
SEA7:35 pmSeattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 amMontreal Pierre Elliott Trudeau Intl
Oct 10
YUL7:15 amMontreal Pierre Elliott Trudeau Intl
14h 30m
1 stop
SEA6:45 pmSeattle/Tacoma Intl
$375
WestJet
Sep 10
SEA7:35 pmSeattle/Tacoma Intl
8h 30m
1 stop
YUL7:05 amMontreal Pierre Elliott Trudeau Intl
Sep 15
YUL6:45 amMontreal Pierre Elliott Trudeau Intl
15h 00m
2 stops
SEA6:45 pmSeattle/Tacoma Intl
$381

United Airlines flights from Seattle to Montreal

Our best United Airlines deals on Seattle to Montreal flight tickets
United Airlines
Aug 18
SEA12:15 pmSeattle/Tacoma Intl
17h 01m
2 stops
YUL8:16 amMontreal Pierre Elliott Trudeau Intl
Aug 25
YUL9:45 amMontreal Pierre Elliott Trudeau Intl
12h 22m
1 stop
SEA7:07 pmSeattle/Tacoma Intl
$454
United Airlines
Aug 19
SEA5:20 pmSeattle/Tacoma Intl
11h 56m
1 stop
YUL8:16 amMontreal Pierre Elliott Trudeau Intl
Aug 26
YUL6:10 amMontreal Pierre Elliott Trudeau Intl
8h 22m
1 stop
SEA11:32 amSeattle/Tacoma Intl
$505
United Airlines
Aug 19
SEA5:20 pmSeattle/Tacoma Intl
11h 56m
1 stop
YUL8:16 amMontreal Pierre Elliott Trudeau Intl
Aug 26
YUL6:10 amMontreal Pierre Elliott Trudeau Intl
15h 58m
2 stops
SEA7:08 pmSeattle/Tacoma Intl
$510

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Montreal 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 August 5, 2026.
Use the filters below to find and compare flights from Seattle to Montreal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Thu 8/27

7:35 pm-7:05 am

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Wed 9/2

5:00 pm-10:42 pm

1 stop8h 42m

$357

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Thu 8/27

7:35 pm-7:05 am

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Wed 9/2

9:00 am-6:32 pm

2 stops12h 32m

$358

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Thu 8/27

7:20 pm-7:10 am

2 stops8h 50m

Montreal Pierre Elliott Trudeau Intl

Wed 9/2

9:00 am-6:32 pm

2 stops12h 32m

$363

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Thu 9/17

7:35 pm-7:05 am

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Thu 9/24

6:45 am-6:45 pm

2 stops15h 00m

$363

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Wed 9/16

3:00 pm-7:10 am

2 stops13h 10m

Montreal Pierre Elliott Trudeau Intl

Wed 9/23

11:10 am-6:32 pm

2 stops10h 22m

$364

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Thu 10/1

7:35 pm-7:05 am

1 stop8h 30m

Montreal Pierre Elliott Trudeau Intl

Wed 10/7

6:45 am-6:45 pm

2 stops15h 00m

$364

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Tue 8/18

5:13 pm-10:40 am

1 stop14h 27m

Montreal Pierre Elliott Trudeau Intl

Wed 8/26

11:23 am-6:41 pm

1 stop10h 18m

$444

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Tue 8/18

5:13 pm-10:40 am

1 stop14h 27m

Montreal Pierre Elliott Trudeau Intl

Tue 8/25

9:45 am-4:07 pm

1 stop9h 22m

$444

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Wed 8/19

9:10 am-11:52 pm

1 stop11h 42m

Montreal Pierre Elliott Trudeau Intl

Sun 8/23

7:00 am-4:44 pm

1 stop12h 44m

$468

SeattleMontreal

SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl

SEAYUL

Seattle/Tacoma Intl

Wed 8/19

9:10 am-11:52 pm

1 stop11h 42m

Montreal Pierre Elliott Trudeau Intl

Tue 8/25

12:44 pm-11:57 pm

1 stop14h 13m

$468

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 Montreal from

How to get the cheapest flight ticket from Seattle to Montreal

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 Seattle and Montreal?

Prices are currently low for flights on this route.

Typical prices usually range from $471 to $719.
The lowest price recently found on this route was $357.

What is the cheapest month to fly to Montreal?

The cheapest month to fly to Montreal from Seattle is in March. Flight prices, which tend to average around $467, are often lower during this time because this is during the off-season. If you are unable to visit Montreal during the month of March, then departing from Seattle during the month October is also very affordable. Most momondo users find prices during this month for around $570.

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

The cheapest day to depart from Seattle to Montreal is on a Wednesday when prices can be found for as low as $601. Flights from Seattle to Montreal on a Friday will generally be more expensive and average around $840. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Fly from Seattle/Tacoma Intl to Montreal Pierre Elliott Trudeau Intl for the best Seattle/Tacoma Intl - Montreal flight prices

How far in advance should I book a flight from Seattle to Montreal?

You are more likely to see cheaper flights to Montreal from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Montreal for around $720 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Montreal from Seattle for as low as $274 on momondo.

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

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

You could potentially save up to 41% on your flight if you consider stops on a Seattle to Montreal flight.

How have Seattle to Montreal flight prices changed over time?

As of August 2026, prices for Seattle to Montreal flights are approximately 8% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Montreal

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

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

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

Best Price Found

$3,219

Fastest flight time

6h 59m

Direct flights

None
The best flight deal from Seattle to Montreal found on momondo in the last 72 hours is $3,219
The fastest flight from Seattle to Montreal takes 6h 59m
There are no direct flights from Seattle to Montreal. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - Montreal Pierre Elliott Trudeau Intl Airport.
Search flight deals

Frequently asked questions about flying from Seattle to Montreal

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

    The straight-line distance from Seattle/Tacoma Intl to Montreal is 2282.0 mi. Typically, this will take 6h 59m by plane in normal conditions.

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

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

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

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Montreal?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Montreal.

  • What documentation or ID do you need to fly to Montreal?

    The required travel and health documents for your Montreal trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Montreal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Seattle to Montreal?

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

Best airlines flying from Seattle to Montreal

Compare and see reviews for airlines that fly from Seattle to Montreal with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom $198Free CancellationRating
7.2
3,426 reviews
Search WestJet flights
United AirlinesPriceFrom $265Free CancellationRating
7.4
10,072 reviews
Search United Airlines flights
DeltaPriceFrom $318Free CancellationRating
7.8
8,492 reviews
Search Delta flights
Air CanadaPriceFrom $436Free CancellationRating
7.1
11,429 reviews
Search Air Canada flights

Why use momondo?

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

Finding the right flight to Montreal from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Montreal quick and easy, saving you time and money.

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

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

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

momondo provides multiple filters to help you find the best flight to Montreal from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Seattle to Montreal flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Montreal trip

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Find better results for your trip to Canada

Fly into one of these airports located in Montreal

Airports listed have a maximum distance of 9.4 mi from Montreal
Montreal St Hubert Airport
Montreal Pierre Elliott Trudeau Intl Airport