Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Montreal to Seattle from C$ 217

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 8/5. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Early arrival? 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 to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
6:45 a.m. - 1:08 p.m.YUL-SEA
9h 23m1 stop
WestJet Logo
2:05 p.m. - 12:42 a.m.SEA-YUL
7h 37m1 stop
C$ 281WestJet
Find Deal
Mon, 4 May - Tue, 12 May
WestJet Logo
6:45 a.m. - 1:08 p.m.YUL-SEA
9h 23m1 stop
WestJet Logo
2:05 p.m. - 12:42 a.m.SEA-YUL
7h 37m1 stop
C$ 306WestJet
Find Deal
Thu, 21 May - Mon, 25 May
WestJet Logo
5:30 p.m. - 1:08 p.m.YUL-SEA
22h 38m1 stop
WestJet Logo
2:05 p.m. - 12:42 a.m.SEA-YUL
7h 37m1 stop
C$ 320WestJet
Find Deal
Tue, 5 May - Mon, 11 May
WestJet Logo
6:45 a.m. - 1:08 p.m.YUL-SEA
33h 23m2 stops
WestJet Logo
2:05 p.m. - 12:42 a.m.SEA-YUL
7h 37m1 stop
C$ 332WestJet
Find Deal
Tue, 5 May - Mon, 11 May
WestJet Logo
6:45 a.m. - 1:08 p.m.YUL-SEA
9h 23m1 stop
WestJet Logo
7:05 a.m. - 12:40 a.m.SEA-YUL
14h 35m2 stops
C$ 334WestJet
Find Deal
Thu, 21 May - Mon, 25 May
WestJet Logo
5:30 p.m. - 12:30 p.m.YUL-SEA
22h 00m2 stops
WestJet Logo
2:05 p.m. - 12:40 a.m.SEA-YUL
31h 35m2 stops
C$ 354WestJet
Find Deal
Thu, 21 May - Mon, 25 May
WestJet Logo
7:30 p.m. - 2:20 p.m.YUL-SEA
21h 50m1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
C$ 360WestJet
Find Deal
Wed, 14 Jan - Wed, 4 Feb
WestJet Logo
7:30 p.m. - 2:19 p.m.YUL-SEA
21h 49m1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
C$ 361WestJet
Find Deal
Wed, 11 Feb - Tue, 17 Feb
WestJet Logo
7:30 p.m. - 2:19 p.m.YUL-SEA
21h 49m1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
C$ 364WestJet
Find Deal
Sun, 29 Mar - Thu, 9 Apr
WestJet Logo
6:45 a.m. - 2:20 p.m.YUL-SEA
34h 35m2 stops
WestJet Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
C$ 371WestJet
Find Deal
Wed, 14 Jan - Wed, 4 Feb

American Airlines flights from Montreal to Seattle

Our best American Airlines deals on Montreal to Seattle flight tickets
American Airlines
11 Dec
YUL3:50 p.m.Montreal Pierre Elliott Trudeau Intl
10h 35m
1 stop
SEA11:25 p.m.Seattle/Tacoma Intl
14 Dec
SEA10:07 p.m.Seattle/Tacoma Intl
12h 42m
1 stop
YUL1:49 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 430
Find similar
American Airlines
10 Dec
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
14h 49m
1 stop
SEA6:49 p.m.Seattle/Tacoma Intl
15 Dec
SEA12:31 a.m.Seattle/Tacoma Intl
11h 53m
2 stops
YUL3:24 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 530
Find similar
American Airlines
29 Nov
YUL12:59 p.m.Montreal Pierre Elliott Trudeau Intl
12h 11m
1 stop
SEA10:10 p.m.Seattle/Tacoma Intl
6 Dec
SEA10:59 p.m.Seattle/Tacoma Intl
10h 21m
1 stop
YUL12:20 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 1,247
Find similar

WestJet flights from Montreal to Seattle

Our best WestJet deals on Montreal to Seattle flight tickets
WestJet
4 May
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
9h 23m
1 stop
SEA1:08 p.m.Seattle/Tacoma Intl
12 May
SEA2:05 p.m.Seattle/Tacoma Intl
7h 37m
1 stop
YUL12:42 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 281
Find similar
WestJet
8 May
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
9h 23m
1 stop
SEA1:08 p.m.Seattle/Tacoma Intl
16 May
SEA2:05 p.m.Seattle/Tacoma Intl
7h 37m
1 stop
YUL12:42 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 282
Find similar
WestJet
21 May
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
9h 23m
1 stop
SEA1:08 p.m.Seattle/Tacoma Intl
25 May
SEA2:05 p.m.Seattle/Tacoma Intl
7h 37m
1 stop
YUL12:42 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 306
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 96,600 searches. Data last updated 26 November 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 4/5

6:45 a.m.-1:08 p.m.

1 stop9h 23m

Seattle/Tacoma Intl

Tue 12/5

2:05 p.m.-12:42 a.m.

1 stop7h 37m

C$ 281

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 21/5

6:45 a.m.-1:08 p.m.

1 stop9h 23m

Seattle/Tacoma Intl

Mon 25/5

2:05 p.m.-12:42 a.m.

1 stop7h 37m

C$ 306

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 5/5

5:30 p.m.-1:08 p.m.

1 stop22h 38m

Seattle/Tacoma Intl

Mon 11/5

2:05 p.m.-12:42 a.m.

1 stop7h 37m

C$ 320

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 5/5

6:45 a.m.-1:08 p.m.

2 stops33h 23m

Seattle/Tacoma Intl

Mon 11/5

2:05 p.m.-12:42 a.m.

1 stop7h 37m

C$ 332

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 21/5

6:45 a.m.-1:08 p.m.

1 stop9h 23m

Seattle/Tacoma Intl

Mon 25/5

7:05 a.m.-12:40 a.m.

2 stops14h 35m

C$ 334

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 21/5

5:30 p.m.-12:30 p.m.

2 stops22h 00m

Seattle/Tacoma Intl

Mon 25/5

2:05 p.m.-12:40 a.m.

2 stops31h 35m

C$ 354

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 14/1

7:30 p.m.-2:20 p.m.

1 stop21h 50m

Seattle/Tacoma Intl

Wed 4/2

3:10 p.m.-7:05 a.m.

1 stop12h 55m

C$ 360

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 11/2

7:30 p.m.-2:19 p.m.

1 stop21h 49m

Seattle/Tacoma Intl

Tue 17/2

3:10 p.m.-7:05 a.m.

1 stop12h 55m

C$ 361

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 29/3

7:30 p.m.-2:19 p.m.

1 stop21h 49m

Seattle/Tacoma Intl

Thu 9/4

3:10 p.m.-7:05 a.m.

1 stop12h 55m

C$ 364

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 14/1

6:45 a.m.-2:20 p.m.

2 stops34h 35m

Seattle/Tacoma Intl

Wed 4/2

3:10 p.m.-7:05 a.m.

1 stop12h 55m

C$ 371

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 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?

If you aren’t able to travel to Seattle during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of C$ 677.

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

Our data shows that Friday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 689. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 794. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

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

Our most recent data shows that the best time of day to fly to Seattle is in the evening. Flights from Montreal to Seattle during this time can be as low as C$ 572. Flights at noon are often more expensive with an average ticket price of C$ 772.

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 C$ 702 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 C$ 508 on momondo.

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

There is only 1 cabin class 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?

You could potentially save up to 27% on your flight if you consider stops on a Montreal to Seattle flight.

How have Montreal to Seattle flight prices changed over time?

As of November 2025, prices for Montreal to Seattle flights are approximately 36% 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

Fastest flight time

5h 56m

Direct flights

Tue, Wed, Fri and Sat

Airports in Seattle

1 airport
The fastest flight from Montreal to Seattle takes 5h 56m
Direct flights go from Montreal to Seattle on Tuesday, Wednesday, Friday and Saturday. There are no airlines offering direct flights.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

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

    The straight-line distance from Montreal to Seattle/Tacoma Intl is 3672.5 km. In terms of flight time, this usually takes a little over 8h 31m.

  • 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 for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for 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
DeltaPriceFrom C$ 287Free CancellationRating
7.9
7,998 reviews
Search Delta flights
WestJetPriceFrom C$ 376Free CancellationRating
7.2
3,173 reviews
Search WestJet flights
American AirlinesPriceFrom C$ 466Free CancellationRating
7.2
11,038 reviews
Search American Airlines flights
Air CanadaPriceFrom C$ 511Free CancellationRating
7.1
10,476 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 546Free CancellationRating
7.4
9,046 reviews
Search United Airlines flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Lynnwood
Marysville
Tacoma
SeaTac
Kirkland
Tukwila
Olympia
Ocean Shores
Redmond
Bainbridge Island
Ellensburg
Gig Harbor
Renton
Mukilteo
Cle Elum
Centralia
Federal Way
Puyallup
Kent

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Montreal to Seattle . Millions of users trust and use momondo every year so you are in good hands.

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

Flights from Montreal to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Montreal.

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

Yes. momondo can track prices for Montreal to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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
Fri 26/12
Fri 2/1
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States