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Cheap flights from Montreal to Seattle from $159

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 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 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 - 12:38 amSEA-YUL
30h 28m2 stops
$263WestJet
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Mon, Mar 9 - Mon, Mar 23
WestJet Logo
6:45 am - 2:20 pmYUL-SEA
34h 35m2 stops
WestJet Logo
3:10 pm - 12:43 amSEA-YUL
30h 33m2 stops
$273WestJet
Find Deal
Thu, Jan 22 - Wed, Jan 28
WestJet Logo
6:45 am - 2:19 pmYUL-SEA
34h 34m2 stops
WestJet Logo
3:10 pm - 7:05 amSEA-YUL
12h 55m1 stop
$287WestJet
Find Deal
Sun, Mar 29 - Thu, Apr 2
WestJet Logo
6:45 am - 2:19 pmYUL-SEA
34h 34m2 stops
WestJet Logo
3:10 pm - 12:38 amSEA-YUL
30h 28m2 stops
$319WestJet
Find Deal
Mon, Mar 9 - Mon, Mar 23
Multiple Airlines Logo
6:45 am - 4:36 pmYUL-SEA
12h 51m2 stops
Multiple Airlines Logo
3:10 pm - 7:05 amSEA-YUL
12h 55m1 stop
$379Multiple Airlines
Find Deal
Mon, Dec 8 - Tue, Dec 9
Multiple Airlines Logo
6:00 pm - 2:20 pmYUL-SEA
23h 20m1 stop
Multiple Airlines Logo
3:10 pm - 1:32 pmSEA-YUL
19h 22m1 stop
$394Multiple Airlines
Find Deal
Sat, Dec 6 - Thu, Dec 11
Delta Logo
12:40 pm - 8:50 pmYUL-SEA
11h 10m1 stop
Delta Logo
5:05 am - 11:32 pmSEA-YUL
15h 27m2 stops
$424Delta
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Thu, Dec 4 - Sat, Dec 13
Delta Logo
12:50 pm - 10:23 pmYUL-SEA
12h 33m1 stop
Delta Logo
7:15 am - 11:42 pmSEA-YUL
13h 27m2 stops
$428Delta
Find Deal
Wed, Nov 19 - Mon, Nov 24
American Airlines Logo
7:14 am - 7:42 pmYUL-SEA
15h 28m1 stop
American Airlines Logo
2:46 pm - 3:10 pmSEA-YUL
21h 24m1 stop
$432American Airlines
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Thu, Dec 4 - Sat, Dec 13
American Airlines Logo
7:14 am - 6:55 pmYUL-SEA
14h 41m2 stops
American Airlines Logo
12:38 am - 3:24 pmSEA-YUL
11h 46m2 stops
$452American Airlines
Find Deal
Sat, Dec 6 - Wed, Dec 10

Delta flights from Montreal to Seattle

Our best Delta deals on Montreal to Seattle flight tickets
Delta
Dec 4
YUL12:40 pmMontreal Pierre Elliott Trudeau Intl
11h 10m
1 stop
SEA8:50 pmSeattle/Tacoma Intl
Dec 13
SEA5:05 amSeattle/Tacoma Intl
15h 27m
2 stops
YUL11:32 pmMontreal Pierre Elliott Trudeau Intl
$424
Find similar
Delta
Nov 19
YUL12:50 pmMontreal Pierre Elliott Trudeau Intl
12h 33m
1 stop
SEA10:23 pmSeattle/Tacoma Intl
Nov 24
SEA7:15 amSeattle/Tacoma Intl
13h 27m
2 stops
YUL11:42 pmMontreal Pierre Elliott Trudeau Intl
$428
Find similar
Delta
Dec 4
YUL7:10 amMontreal Pierre Elliott Trudeau Intl
11h 25m
2 stops
SEA3:35 pmSeattle/Tacoma Intl
Dec 13
SEA9:35 pmSeattle/Tacoma Intl
11h 25m
2 stops
YUL12:00 pmMontreal Pierre Elliott Trudeau Intl
$431
Find similar

WestJet flights from Montreal to Seattle

Our best WestJet deals on Montreal to Seattle flight tickets
WestJet
Mar 9
YUL4:15 pmMontreal Pierre Elliott Trudeau Intl
25h 04m
1 stop
SEA2:19 pmSeattle/Tacoma Intl
Mar 23
SEA3:10 pmSeattle/Tacoma Intl
30h 28m
2 stops
YUL12:38 amMontreal Pierre Elliott Trudeau Intl
$263
Find similar
WestJet
Jan 22
YUL6:45 amMontreal Pierre Elliott Trudeau Intl
34h 35m
2 stops
SEA2:20 pmSeattle/Tacoma Intl
Jan 28
SEA3:10 pmSeattle/Tacoma Intl
30h 33m
2 stops
YUL12:43 amMontreal Pierre Elliott Trudeau Intl
$273
Find similar
WestJet
Mar 29
YUL6:45 amMontreal Pierre Elliott Trudeau Intl
34h 34m
2 stops
SEA2:19 pmSeattle/Tacoma Intl
Apr 2
SEA3:10 pmSeattle/Tacoma Intl
12h 55m
1 stop
YUL7:05 amMontreal Pierre Elliott Trudeau Intl
$287
Find similar

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 November 6, 2025.
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

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 3/9

4:15 pm-2:19 pm

1 stop25h 04m

Seattle/Tacoma Intl

Mon 3/23

3:10 pm-12:38 am

2 stops30h 28m

$263

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 1/22

6:45 am-2:20 pm

2 stops34h 35m

Seattle/Tacoma Intl

Wed 1/28

3:10 pm-12:43 am

2 stops30h 33m

$273

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 3/29

6:45 am-2:19 pm

2 stops34h 34m

Seattle/Tacoma Intl

Thu 4/2

3:10 pm-7:05 am

1 stop12h 55m

$287

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 3/9

6:45 am-2:19 pm

2 stops34h 34m

Seattle/Tacoma Intl

Mon 3/23

3:10 pm-12:38 am

2 stops30h 28m

$319

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 12/8

6:45 am-4:36 pm

2 stops12h 51m

Seattle/Tacoma Intl

Tue 12/9

3:10 pm-7:05 am

1 stop12h 55m

$379

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 12/6

6:00 pm-2:20 pm

1 stop23h 20m

Seattle/Tacoma Intl

Thu 12/11

3:10 pm-1:32 pm

1 stop19h 22m

$394

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 12/4

12:40 pm-8:50 pm

1 stop11h 10m

Seattle/Tacoma Intl

Sat 12/13

5:05 am-11:32 pm

2 stops15h 27m

$424

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 11/19

12:50 pm-10:23 pm

1 stop12h 33m

Seattle/Tacoma Intl

Mon 11/24

7:15 am-11:42 pm

2 stops13h 27m

$428

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 12/4

7:14 am-7:42 pm

1 stop15h 28m

Seattle/Tacoma Intl

Sat 12/13

2:46 pm-3:10 pm

1 stop21h 24m

$432

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 12/6

7:14 am-6:55 pm

2 stops14h 41m

Seattle/Tacoma Intl

Wed 12/10

12:38 am-3:24 pm

2 stops11h 46m

$452

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, September 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 $479. If you don’t want to visit Seattle in September, then you should wait until August to fly from Montreal, when ticket prices are also cheap, with an average price of $480.

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, Tuesday 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 $475.

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

Flying to Seattle from Montreal 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 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 $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 for as low as $360 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 November 2025, prices for Montreal to Seattle flights are approximately 28% more expensive 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

Best Price Found

$833

Fastest flight time

5h 56m

Direct flights

Sat

Airports in Seattle

1 airport
The best flight deal from Montreal to Seattle found on momondo in the last 72 hours is $833
The fastest flight from Montreal to Seattle takes 5h 56m
Direct flights go from Montreal to Seattle on Saturday. The only airline offering direct flights is United Airlines.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • 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 38m 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 $270Free CancellationRating
7.2
3,155 reviews
Search WestJet flights
Air CanadaPriceFrom $316Free CancellationRating
7.1
10,416 reviews
Search Air Canada flights
United AirlinesPriceFrom $516Free CancellationRating
7.4
9,007 reviews
Search United Airlines 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
Kent
Puyallup
Marysville
Redmond
Tukwila
Lakewood
Federal Way
Fife
Cle Elum
Centralia
Kirkland
Westport
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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