Which is the best airline for flights from Montreal to Seattle, Delta or United Airlines?

The two airlines most popular with KAYAK users for flights from Montreal to Seattle are Delta and United Airlines. With an average price for the route of C$ 739 and an overall rating of 7.8, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of C$ 864 and an overall rating of 7.4.

How long does a flight from Montreal to Seattle take?

There are no direct flights from Montreal to Seattle. The quickest journey takes 6h 22m .

Which airlines fly direct between Montreal Pierre Elliott Trudeau Intl Airport and Seattle?

There are 2 airlines that fly direc from Montreal Pierre Elliott Trudeau Intl Airport to Seattle. They are Air Canada and United Airlines . The cheapest airline for this route is United Airlines, with the best round-trip deal found costing C$ 499. On average, the best prices for this route can be found at Air Canada.

Which aircraft models fly most regularly from Montreal to Seattle?

The Airbus A220-300 is the aircraft model that flies most regularly on the Montreal to Seattle flight route.

Which airline alliances offer flights from Montreal to Seattle?

oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Montreal and Seattle, with oneworld being the most commonly used for this route.

How does KAYAK find such low prices on flights from Montreal to Seattle?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Montreal to Seattle.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Montreal to Seattle?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Montreal is likely to change within 7 days, so travellers know whether to wait or book now.

What is the Hacker Fare option on flights from Montreal to Seattle?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Montreal with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Montreal to Seattle?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Montreal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

What is the cheapest layover airport when flying from Montreal to Seattle?

Flights via Dallas (DFW) offer the most affordable fares, with an average round-trip price of C$ 464.

What is the most popular layover airport when flying from Montreal to Seattle?

Toronto (YYZ) is the top choice – 41% of KAYAK users who clicked on one-stop flights from Montreal to Seattle picked an itinerary connecting there.

Which layover airport has the quickest connection when flying from Montreal to Seattle?

If you prefer a quick connection, Chicago (ORD) often has the shortest layovers from Montreal to Seattle, with an average of 1h 09m .

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

Consider flying via Minneapolis (MSP) for the shortest journey. The average one-way travel time for flights connecting there is 8h 39m .

Which cabin class options are there for flights between Montreal Pierre Elliott Trudeau Intl Airport and Seattle?

There is only one cabin class option available for the route, which is Economy . Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Which airlines provide the cheapest flights from Montreal to Seattle?

In the past 5 days, the cheapest round-trip tickets from Montreal to Seattle were found on WestJet (C$ 420) and Air Canada (C$ 516).

What are the most popular airlines flying to Seattle?

The most popular airline among KAYAK users flying to Seattle is Air Canada, followed by WestJet and United Airlines.

C$ 252 CHEAP FLIGHTS from Montreal to Seattle (YUL - SEA)

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest round-trip

C$ 420

Typical prices: C$ 556-C$ 1,028

WestJet

Thu 10/9Wed 16/9

YUL - SEA • 2 stops

Cheapest one-way flights

C$ 252

Typical prices: C$ 318-C$ 674

WestJet

Wed 23/9

YUL - SEA • 2 stops

Advice from real travellers

AI-powered summary based on content written by travel experts. AI can make mistakes.

Air Canada Preferred Economy adds up to 10 cm more legroom for a fee.

United Economy Plus offers up to 15 cm extra; Priority Boarding helps bin space.

Expert advice

Top layover airports

Dallas (DFW)

Cheapest • Avg C$ 464 (round-trip)

Minneapolis (MSP)

Shortest trip • 8h 39m (one-way)

Insights

When to book

4 weeks

in advance

Our data shows that travellers who book at least 4 weeks in advance save around 31% compared to booking last minute.

Insights

When to travel

February

Cheapest • 18% price drop

July

Most popular

Good to know

Start a new search

KAYAK searches hundreds of sites at once to find you the best travel deals.

We hope you love your trip to Seattle!

Flight Deals

Cheap Flights from Montreal to Seattle (YUL-SEA)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Montreal to Seattle

Thu, 10 Sep - Wed, 16 Sep

6:45 a.m. - 6:45 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

15h 00m2 stops Toronto Pearson Intl Calgary

7:35 p.m. - 7:05 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

8h 30m1 stop Calgary

C$ 420WestJet

Tue, 8 Sep - Fri, 11 Sep

7:15 a.m. - 6:45 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

14h 30m1 stop Calgary

7:35 p.m. - 7:05 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

8h 30m1 stop Calgary

C$ 437WestJet

Tue, 20 Oct - Tue, 27 Oct

6:00 p.m. - 10:47 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

7h 47m1 stop Vancouver Intl

8:40 a.m. - 8:43 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

9h 03m1 stop Vancouver Intl

C$ 513Air Canada

Wed, 25 Nov - Tue, 8 Dec

7:30 a.m. - 2:37 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

10h 07m1 stop Vancouver Intl

8:15 a.m. - 7:35 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

8h 20m1 stop Vancouver Intl

C$ 516Air Canada

Sat, 31 Oct - Tue, 10 Nov

7:00 a.m. - 4:58 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

12h 58m1 stop Minneapolis St Paul

8:25 a.m. - 11:56 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

12h 31m1 stop Atlanta Hartsfield-Jackson

C$ 520Delta

Tue, 20 Oct - Tue, 27 Oct

4:15 p.m. - 10:59 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

9h 44m1 stop Philadelphia

8:24 a.m. - 9:30 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

10h 06m1 stop Philadelphia

C$ 523American Airlines

Tue, 24 Nov - Wed, 9 Dec

12:50 p.m. - 9:58 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

12h 08m1 stop Detroit Metropolitan Wayne County

9:40 a.m. - 11:33 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

10h 53m1 stop Detroit Metropolitan Wayne County

C$ 524Delta

Sat, 19 Sep - Tue, 22 Sep

5:34 p.m. - 12:11 a.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

9h 37m1 stop Chicago O'Hare Intl

11:57 p.m. - 11:44 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

8h 47m1 stop Chicago O'Hare Intl

C$ 533American Airlines

Sat, 19 Sep - Wed, 30 Sep

6:10 a.m. - 8:43 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

17h 33m2 stops Chicago O'Hare Intl San Francisco

7:00 a.m. - 9:26 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

11h 26m1 stop Chicago O'Hare Intl

C$ 594United Airlines

Tue, 3 Nov - Wed, 4 Nov

3:00 p.m. - 9:49 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

9h 49m1 stop Newark

5:05 a.m. - 9:17 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

13h 12m2 stops Denver Intl Chicago O'Hare Intl

C$ 594United Airlines

Recent last minute flight deals from Montreal to Seattle

Wed, 2 Sep - Wed, 30 Sep

5:30 p.m. - 6:45 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

28h 15m1 stop Calgary

7:35 p.m. - 7:05 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

8h 30m1 stop Calgary

C$ 540WestJet

Wed, 2 Sep - Mon, 28 Sep

8:00 p.m. - 9:40 a.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

16h 40m1 stop Calgary

7:35 p.m. - 7:05 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

8h 30m1 stop Calgary

C$ 540WestJet

Wed, 2 Sep - Tue, 29 Sep

8:00 p.m. - 9:40 a.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

16h 40m1 stop Calgary

10:30 a.m. - 12:25 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

10h 55m2 stops Calgary Toronto Pearson Intl

C$ 553WestJet

Sat, 29 Aug - Sat, 26 Sep

6:00 a.m. - 2:34 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

11h 34m1 stop Detroit Metropolitan Wayne County

6:00 a.m. - 4:19 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

7h 19m1 stop Detroit Metropolitan Wayne County

C$ 702Delta

Sat, 29 Aug - Tue, 22 Sep

7:00 a.m. - 2:45 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

10h 45m1 stop Atlanta Hartsfield-Jackson

8:59 a.m. - 11:50 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

11h 51m1 stop Atlanta Hartsfield-Jackson

C$ 702Delta

Sat, 29 Aug - Tue, 15 Sep

9:15 a.m. - 8:45 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

14h 30m1 stop Washington, D.C. Dulles Intl

3:30 p.m. - 8:16 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

13h 46m1 stop San Francisco

C$ 713United Airlines

Sat, 29 Aug - Wed, 16 Sep

3:25 p.m. - 11:44 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

11h 19m1 stop Newark

5:20 p.m. - 8:16 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

11h 56m1 stop San Francisco

C$ 713United Airlines

Tue, 1 Sep - Sun, 27 Sep

1:45 p.m. - 10:42 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

11h 57m2 stops Calgary Vancouver Intl

3:00 p.m. - 7:10 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

13h 10m2 stops Vancouver Intl Edmonton

C$ 746Air Canada

Wed, 2 Sep - Thu, 1 Oct

9:00 a.m. - 6:32 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

12h 32m2 stops Edmonton Vancouver Intl

3:00 p.m. - 7:10 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

13h 10m2 stops Vancouver Intl Calgary

C$ 746Air Canada

Sat, 29 Aug - Fri, 25 Sep

5:00 p.m. - 10:39 a.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

20h 39m2 stops Toronto Pearson Intl Las Vegas Harry Reid Intl

10:30 a.m. - 11:45 p.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

10h 15m1 stop Calgary

C$ 903Multiple Airlines

Booking Insights

KAYAK's insights & trends for Montreal to Seattle flights

Get data-powered insights and trends into flights from Montreal to Seattle to help you find the cheapest flights, the best time to fly and much more.

Prices

Airlines

Layovers

How much is a round-trip flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

Flight prices are below average for this route right now.

Flights to Seattle from Montreal Pierre Elliott Trudeau Intl Airport usually cost between C$ 556 and C$ 1,028 in September.
The lowest price found in the past 5 days was C$ 420 on WestJet (10 Sep–16 Sep).

What’s the cheapest day of the week to fly from Montreal to Seattle?

If you are looking for a flight deal from Montreal to Seattle, look for departures on Fridays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Seattle, Sunday is the cheapest day to fly and Saturday is the most expensive.

What is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

The cheapest month for flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle is February, where tickets cost C$ 578 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is C$ 847 and C$ 800 respectively.

Can I save money by flying with a layover from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at C$ 579 on average.

How far in advance should I book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

To get a below average price on the flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle, you should book around 4 weeks before departure, which saves you about 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Find deals

Expert advice

Our travel experts

Stefanie Waldek

Expert on Air Canada and United Airlines

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Mark Stachiew

Expert on YUL

Mark Stachiew has been exploring the world and writing about it for more than 30 years. His travel stories have appeared in numerous newspapers, magazines and online publications in Canada, the United States and beyond.

Harriet Baskas

Expert on SEA

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Low season	February
High season	July
Cheapest flight	C$ 252

Best time to beat the crowds (18% less expensive on average)

Most popular time to fly (13% more expensive on average)

Flight from Montreal to Seattle

When to book flights from Montreal to Seattle

Are your dates flexible? Find out the best times to travel from Montreal to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What is the cheapest flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?
In the last 5 days, the lowest price for a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle was C$ 252 for a one-way ticket and C$ 420 for a round-trip.
Which aircraft models fly most regularly from Montreal to Seattle?
The Airbus A220-300 is the aircraft model that flies most regularly on the Montreal to Seattle flight route.
Which airline alliances offer flights from Montreal to Seattle?
oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Montreal and Seattle, with oneworld being the most commonly used for this route.
Which is the best airline for flights from Montreal to Seattle, Delta or United Airlines?
The two airlines most popular with KAYAK users for flights from Montreal to Seattle are Delta and United Airlines. With an average price for the route of C$ 739 and an overall rating of 7.8, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of C$ 864 and an overall rating of 7.4.
How does KAYAK find such low prices on flights from Montreal to Seattle?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Montreal to Seattle.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Montreal to Seattle?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Montreal is likely to change within 7 days, so travellers know whether to wait or book now.
What is the Hacker Fare option on flights from Montreal to Seattle?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Montreal with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Montreal to Seattle?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Montreal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Montreal to Seattle

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on your arrival and departure airports

Montreal (YUL)

Seattle (SEA)

YUL - SEA

C$ 252 Find Cheap Flights from Montreal to Seattle – Compare and Save

Everything you should know

Cheap Flights from Montreal to Seattle (YUL-SEA)

Recent round-trip flight deals from Montreal to Seattle

Recent one-way flight deals from Montreal to Seattle

Recent last minute flight deals from Montreal to Seattle

KAYAK's insights & trends for Montreal to Seattle flights

How much is a round-trip flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

What’s the cheapest day of the week to fly from Montreal to Seattle?

What is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

Can I save money by flying with a layover from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

How far in advance should I book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle?

Which airlines provide the cheapest flights from Montreal to Seattle?

Which airlines fly direct between Montreal Pierre Elliott Trudeau Intl Airport and Seattle?

What is the most popular layover airport when flying from Montreal to Seattle?

What is the cheapest layover airport when flying from Montreal to Seattle?

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

Which layover airport has the quickest connection when flying from Montreal to Seattle?

Which cabin class options are there for flights between Montreal Pierre Elliott Trudeau Intl Airport and Seattle?

How long does a flight from Montreal to Seattle take?

Expert advice for your flight from Montreal to Seattle

Good to know

Low season

High season

Cheapest flight

When to book flights from Montreal to Seattle

FAQs for booking Montreal to Seattle flights

Everything you need to know for your flight from Montreal to Seattle

Information on your arrival and departure airports

Cabin class types available on flights to Seattle

Complete your trip to Seattle with a hotel stay or car rental

Find direct flights to and from Montreal and Seattle

Flights to other popular destinations

Flights from domestic origins to Seattle

Choose which airport to fly into in Montreal

Find deals for your return flight