Which layover airport offers the lowest fares from Montreal to Seattle?

Flights via Philadelphia (PHL) offer the lowest average round-trip price of C$ 483.

How many flights depart from Montreal to Seattle on average per day?

2 flights are operational daily from Montreal to Seattle as of August 2025. The most popular departure time for this route is 5:00p.m., with 100% of flights per day taking off in the afternoon.

Which airport is the most popular layover for flights between Montreal and Seattle?

Calgary (YYC) was the most common stop: 82% of momondo users choosing one-stop flights on this route connected there.

How many flights depart from Montreal to Seattle on average per week?

14 flights are operational weekly from Montreal to Seattle as of August 2025. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.

Which layover airport has the shortest connection time from Montreal to Seattle?

Philadelphia (PHL) has the shortest average layover time for this route: 1h 12m.

Which airlines fly to Seattle?

Air Canada, WestJet and United Airlines are the top three most popular airlines that fly to Seattle from Montreal according to our data. Air Canada is the first choice among our users, with 67% of people opting to fly with this airline when travelling to Seattle. Keep in mind that there are 5 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Montreal to Seattle/Tacoma Intl?

WestJet, Air Canada, and United Airlines are the most popular carriers operating from Montreal to Seattle/Tacoma Intl

Which layover airport has the shortest travel time from Montreal to Seattle?

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 8h 57m.

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?

There are 5 operators available for flights from Montreal to Seattle/Tacoma Intl Airport as of August 2025.

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.

C$ 238 Cheap Flights from Montreal to Seattle (YMQ-SEA) in 2025

Q: What is the typical price of a round-trip flight between Montreal and Seattle?

Prices are currently low for flights on this route. Typical prices usually range from C$ 589 to C$ 925. The lowest price recently found on this route was C$ 498.

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Find the cheapest flights from Montreal to Seattle (YMQ-SEA)

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

7:00 a.m. - 2:59 p.m.YUL-SEA

10h 59m1 stop

2:05 p.m. - 2:09 p.m.SEA-YUL

21h 04m2 stops

C$ 498

Find Deal

Wed, 1 Oct - Tue, 14 Oct

7:00 a.m. - 12:59 p.m.YUL-SEA

8h 59m1 stop

2:05 p.m. - 2:09 p.m.SEA-YUL

21h 04m2 stops

C$ 502

Find Deal

Tue, 30 Sep - Tue, 14 Oct

6:45 a.m. - 12:33 p.m.YUL-SEA

32h 48m2 stops

8:40 a.m. - 12:27 a.m.SEA-YUL

12h 47m2 stops

C$ 523WestJet

Find Deal

Sat, 4 Oct - Sun, 12 Oct

5:30 p.m. - 12:33 p.m.YUL-SEA

22h 03m2 stops

7:05 a.m. - 12:27 a.m.SEA-YUL

14h 22m2 stops

C$ 524WestJet

Find Deal

Thu, 2 Oct - Tue, 14 Oct

7:30 a.m. - 2:16 p.m.YUL-SEA

9h 46m1 stop

7:15 a.m. - 3:28 p.m.SEA-YUL

5h 13mdirect

C$ 527Air Canada

Find Deal

Wed, 10 Sep - Wed, 17 Sep

4:45 p.m. - 7:31 p.m.YUL-SEA

5h 46mdirect

2:55 p.m. - 7:10 a.m.SEA-YUL

13h 15m2 stops

C$ 528Air Canada

Find Deal

Mon, 8 Sep - Sun, 14 Sep

9:45 a.m. - 3:45 p.m.YUL-SEA

9h 00m1 stop

11:40 p.m. - 10:40 a.m.SEA-YUL

8h 00m1 stop

C$ 555United Airlines

Find Deal

Sat, 4 Oct - Tue, 14 Oct

11:23 a.m. - 9:53 p.m.YUL-SEA

13h 30m2 stops

11:40 p.m. - 10:40 a.m.SEA-YUL

8h 00m1 stop

C$ 562United Airlines

Find Deal

Tue, 30 Sep - Tue, 14 Oct

7:50 a.m. - 6:28 p.m.YUL-SEA

13h 38m2 stops

6:00 a.m. - 10:42 p.m.SEA-YUL

13h 42m1 stop

C$ 566American Airlines

Find Deal

Mon, 8 Sep - Sun, 14 Sep

7:29 a.m. - 10:18 p.m.YUL-SEA

17h 49m1 stop

12:34 a.m. - 4:39 p.m.SEA-YUL

13h 05m1 stop

C$ 569American Airlines

Find Deal

Wed, 8 Oct - Sat, 11 Oct

Air Canada flights from Montreal to Seattle

Our best Air Canada deals on Montreal to Seattle flight tickets

Air Canada

10 Sep

YUL7:30 a.m.Montreal Pierre Elliott Trudeau Intl

9h 46m

1 stop

SEA2:16 p.m.Seattle/Tacoma Intl

17 Sep

SEA7:15 a.m.Seattle/Tacoma Intl

5h 13m

YUL3:28 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 527

Find similar

Air Canada

8 Sep

YUL4:45 p.m.Montreal Pierre Elliott Trudeau Intl

5h 46m

SEA7:31 p.m.Seattle/Tacoma Intl

14 Sep

SEA2:55 p.m.Seattle/Tacoma Intl

13h 15m

2 stops

YUL7:10 a.m.Montreal Pierre Elliott Trudeau Intl

C$ 528

Find similar

Air Canada

8 Oct

YUL4:45 p.m.Montreal Pierre Elliott Trudeau Intl

5h 46m

SEA7:31 p.m.Seattle/Tacoma Intl

11 Oct

SEA7:15 a.m.Seattle/Tacoma Intl

5h 13m

YUL3:28 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 534

Find similar

United Airlines flights from Montreal to Seattle

Our best United Airlines deals on Montreal to Seattle flight tickets

United Airlines

4 Oct

YUL9:45 a.m.Montreal Pierre Elliott Trudeau Intl

9h 00m

1 stop

SEA3:45 p.m.Seattle/Tacoma Intl

14 Oct

SEA11:40 p.m.Seattle/Tacoma Intl

8h 00m

1 stop

YUL10:40 a.m.Montreal Pierre Elliott Trudeau Intl

C$ 555

Find similar

United Airlines

30 Sep

YUL11:23 a.m.Montreal Pierre Elliott Trudeau Intl

13h 30m

2 stops

SEA9:53 p.m.Seattle/Tacoma Intl

14 Oct

SEA11:40 p.m.Seattle/Tacoma Intl

8h 00m

1 stop

YUL10:40 a.m.Montreal Pierre Elliott Trudeau Intl

C$ 562

Find similar

United Airlines

3 Oct

YUL3:41 p.m.Montreal Pierre Elliott Trudeau Intl

9h 36m

1 stop

SEA10:17 p.m.Seattle/Tacoma Intl

14 Oct

SEA11:10 p.m.Seattle/Tacoma Intl

19h 56m

2 stops

YUL10:06 p.m.Montreal Pierre Elliott Trudeau Intl

C$ 563

Find similar

Fly from

Fly to

Route

Depart

Return

Price

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 1/10

7:00 a.m.-2:59 p.m.

1 stop10h 59m

Seattle/Tacoma Intl

Tue 14/10

2:05 p.m.-2:09 p.m.

2 stops21h 04m

C$ 498

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 30/9

7:00 a.m.-12:59 p.m.

1 stop8h 59m

Seattle/Tacoma Intl

Tue 14/10

2:05 p.m.-2:09 p.m.

2 stops21h 04m

C$ 502

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 4/10

6:45 a.m.-12:33 p.m.

2 stops32h 48m

Seattle/Tacoma Intl

Sun 12/10

8:40 a.m.-12:27 a.m.

2 stops12h 47m

C$ 523

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 2/10

5:30 p.m.-12:33 p.m.

2 stops22h 03m

Seattle/Tacoma Intl

Tue 14/10

7:05 a.m.-12:27 a.m.

2 stops14h 22m

C$ 524

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 10/9

7:30 a.m.-2:16 p.m.

1 stop9h 46m

Seattle/Tacoma Intl

Wed 17/9

7:15 a.m.-3:28 p.m.

Nonstop5h 13m

C$ 527

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 8/9

4:45 p.m.-7:31 p.m.

Nonstop5h 46m

Seattle/Tacoma Intl

Sun 14/9

2:55 p.m.-7:10 a.m.

2 stops13h 15m

C$ 528

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 4/10

9:45 a.m.-3:45 p.m.

1 stop9h 00m

Seattle/Tacoma Intl

Tue 14/10

11:40 p.m.-10:40 a.m.

1 stop8h 00m

C$ 555

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 30/9

11:23 a.m.-9:53 p.m.

2 stops13h 30m

Seattle/Tacoma Intl

Tue 14/10

11:40 p.m.-10:40 a.m.

1 stop8h 00m

C$ 562

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 8/9

7:50 a.m.-6:28 p.m.

2 stops13h 38m

Seattle/Tacoma Intl

Sun 14/9

6:00 a.m.-10:42 p.m.

1 stop13h 42m

C$ 566

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 8/10

7:29 a.m.-10:18 p.m.

1 stop17h 49m

Seattle/Tacoma Intl

Sat 11/10

12:34 a.m.-4:39 p.m.

1 stop13h 05m

C$ 569

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

Other information

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 October, then flying in August is also cheap. Prices for this month can be found on momondo for an average of C$ 675.

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$ 671. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 790. 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$ 561. Flights at noon are often more expensive with an average ticket price of C$ 757.

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$ 699 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$ 498 on momondo.

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

There are 1 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?

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 August 2025, prices for Montreal to Seattle flights are approximately 13% 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	C$ 301
Fastest flight time	5h 46m
Direct flights	Every day
Airports in Seattle	1 airport

The best one-way flight to Seattle from Montreal in the past 72 hours is C$ 301. The best round-trip flight deal from Montreal to Seattle found on momondo in the last 72 hours is C$ 554.

The fastest flight from Montreal to Seattle takes 5h 46m

Direct flights go from Montreal to Seattle every day.

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 5h 46m.
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?
There are 5 operators available for flights from Montreal to Seattle/Tacoma Intl Airport as of August 2025.
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?
Based on momondo bookings for flights between Montreal and Seattle, the leading plane model is Airbus A220-300, making up 96.84% of the total bookings. Other popular models include Boeing 737 MAX 8 with 1.27%, Boeing 737 MAX 9 with 1.27%, and Airbus A340-300 with 0.63%.
What is the most popular airline from Montreal to Seattle?
momondo data reveals that the most frequently booked airline on the route from Montreal to Seattle is Air Canada, representing 70% of all bookings. The subsequent popular airlines are WestJet at 16%, United Airlines at 11%, and American Airlines at 4%.

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
WestJet	PriceFrom C$ 368	Free Cancellation	Rating 7.2 3,032 reviews	Search WestJet flights
Delta	PriceFrom C$ 497	Free Cancellation	Rating 7.9 7,982 reviews	Search Delta flights
Air Canada	PriceFrom C$ 509	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
American Airlines	PriceFrom C$ 530	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom C$ 536	Free Cancellation	Rating 7.4 8,928 reviews	Search United Airlines flights

United Airlines Flights From Montreal to Seattle
United Airlines operates around 7 flights from Montreal to Seattle every week. The average price of these flights found in the last 72 hours has been C$ 528, but momondo users have found United Airlines deals from Montreal to Seattle from as low as C$ 387 round-trip. United Airlines has been scored 7.4/10 in 8,928 reviews.
Air Canada Flights From Montreal to Seattle
Air Canada is also a popular choice for this route. Air Canada flight deals for Montreal to Seattle start from as low as C$ 368 round-trip, depending on your selected dates, with average Air Canada deals seen on momondo around C$ 510. Air Canada operates 7 flights to Seattle from Montreal in an average week. Users have rated it 7.1/10 across 10,000 reviews.

Leavenworth

Lynnwood

Marysville

Tacoma

SeaTac

Kirkland

Redmond

Olympia

Ocean Shores

Shoreline

Ellensburg

Tukwila

Gig Harbor

Renton

Mukilteo

Cle Elum

Poulsbo

Puyallup

Kent

Centralia

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.

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Find better results for your trip to the United States

Cheap flights from Montreal to Seattle from C$ 238

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 16/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Montreal to Seattle (YMQ-SEA)

Cheap round-trip flights

Cheap one-way flights

Cheap last-minute flights

Cheap direct flights

Air Canada flights from Montreal to Seattle

Our best Air Canada deals on Montreal to Seattle flight tickets

United Airlines flights from Montreal to Seattle

Our best United Airlines deals on Montreal to Seattle flight tickets

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Use the filters below to find and compare flights from Montreal to Seattle that are best for you.

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 October, then flying in August is also cheap. Prices for this month can be found on momondo for an average of C$ 675.

What is the cheapest day to depart on your flight 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$ 561. Flights at noon are often more expensive with an average ticket price of C$ 757.

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?

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

There are 1 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?

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 August 2025, prices for Montreal to Seattle flights are approximately 13% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from Montreal to Seattle/Tacoma Intl?

WestJet, Air Canada, and United Airlines are the most popular carriers operating from Montreal to Seattle/Tacoma Intl

Which airlines fly to Seattle?

Which airport is the most popular layover for flights between Montreal and Seattle?

Calgary (YYC) was the most common stop: 82% of momondo users choosing one-stop flights on this route connected there.

Which layover airport offers the lowest fares from Montreal to Seattle?

Flights via Philadelphia (PHL) offer the lowest average round-trip price of C$ 483.

Which layover airport has the shortest travel time from Montreal to Seattle?

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 8h 57m.

Which layover airport has the shortest connection time from Montreal to Seattle?

Philadelphia (PHL) has the shortest average layover time for this route: 1h 12m.

How many flights depart from Montreal to Seattle on average per day?

2 flights are operational daily from Montreal to Seattle as of August 2025. The most popular departure time for this route is 5:00p.m., with 100% of flights per day taking off in the afternoon.

How many flights depart from Montreal to Seattle on average per week?

14 flights are operational weekly from Montreal to Seattle as of August 2025. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.

When to book flights from Montreal to Seattle

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

Fastest flight time

Direct flights

Airports in Seattle

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

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

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?

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

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

United Airlines Flights From Montreal to Seattle

Air Canada Flights From Montreal to Seattle

Travelling to a place near Seattle?

Why use momondo?

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

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

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

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

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.