YUL - SEA

$191 Find Cheap Flights from Montreal to Seattle - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Montreal to Seattle departing on 8/26. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$381
Typical prices: $386-$559
Air Canada
Tue 10/20Wed 10/21
YUL - SEA • 1 stop
Cheapest one-way
$191
Typical prices: $377-$804
Air Canada
Wed 8/26
YUL - SEA • 1 stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
United Economy Plus adds up to 6 inches of legroom; Air Canada Preferred Economy adds 4.
At YUL, allow time for US pre-clearance; Air Canada Wi-Fi messaging is free for Aeroplan.
Expert advice
Expert advice
Expert advice
Expert advice
Top layover airports
Atlanta (ATL)
Cheapest • Avg $580 (round-trip)
Vancouver (YVR)
Shortest trip • 8h 24m (one-way)
Insights
Insights
Insights
Insights
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 36% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 17% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Montreal to Seattle (YUL-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Montreal to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Montreal to Seattle

Tue, Oct 20 - Wed, Oct 21
Air Canada Logo
7:30 am - 2:22 pm
YUL
-
SEA
9h 52m
1 stop
Air Canada Logo
5:40 am - 3:59 pm
SEA
-
YUL
7h 19m
1 stop
$381Air Canada
Tue, Aug 11 - Thu, Aug 13
WestJet Logo
8:00 pm - 9:40 am
YUL
-
SEA
16h 40m
1 stop
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
$382WestJet
Mon, Sep 21 - Fri, Sep 25
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
$384WestJet
Sun, Sep 6 - Tue, Sep 15
American Airlines Logo
5:34 pm - 9:29 am
YUL
-
SEA
18h 55m
1 stop
American Airlines Logo
8:20 am - 9:42 pm
SEA
-
YUL
10h 22m
1 stop
$385American Airlines
Sun, Sep 13 - Sat, Sep 19
WestJet Logo
8:00 pm - 9:40 am
YUL
-
SEA
16h 40m
1 stop
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
$386WestJet
Sat, Dec 5 - Tue, Dec 8
Multiple Airlines Logo
6:10 am - 8:10 pm
YUL
-
SEA
17h 00m
2 stops
Multiple Airlines Logo
8:15 am - 8:43 pm
SEA
-
YUL
9h 28m
1 stop
$387Multiple Airlines
Fri, Sep 4 - Sun, Sep 6
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
10:30 am - 11:45 pm
SEA
-
YUL
10h 15m
1 stop
$388WestJet
Tue, Dec 1 - Thu, Dec 10
WestJet Logo
4:15 pm - 1:20 pm
YUL
-
SEA
24h 05m
1 stop
WestJet Logo
3:10 pm - 12:33 am
SEA
-
YUL
30h 23m
2 stops
$389WestJet
Fri, Aug 21 - Sun, Aug 30
Delta Logo
12:44 pm - 11:57 pm
YUL
-
SEA
14h 13m
1 stop
Delta Logo
8:59 am - 11:40 pm
SEA
-
YUL
11h 41m
1 stop
$390Delta
Thu, Aug 20 - Tue, Aug 25
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
WestJet Logo
10:30 am - 12:25 am
SEA
-
YUL
10h 55m
2 stops
$391WestJet
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.

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

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle departing in October.

Flight prices are below average for this route right now.

Flights to Seattle from Montreal Pierre Elliott Trudeau Intl Airport usually cost between $436 and $674 in October.
The lowest price found in the past 5 days was $381 on Air Canada (Oct 20-Oct 21).

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

The average price of all round-trip flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle clicked on KAYAK for each day over the last 12 months.

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle is February, where tickets cost $417 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $623 and $577 respectively.

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

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $526, prices are generally cheapest when you fly direct.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Montreal Pierre Elliott Trudeau Intl Airport to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

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 36% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

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Expert advice

Expert advice for your flight from Montreal to Seattle

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

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.

Read more
Brandon Schultz

Brandon Schultz

Expert on YUL

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more
Harriet Baskas

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.

Read more

Good to know

Low season

February

Cheapest flight

$191
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 14% increase in price.
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.

FAQs for booking Montreal to Seattle flights

  • 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 $191 for a one-way ticket and $381 for a round-trip.

  • Do I need a passport to fly between Montreal and Seattle?

    A passport is required to fly from Montreal to Seattle.

  • Which aircraft models fly most regularly from Montreal to Seattle?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Montreal to Seattle flight route.

  • Which airline alliances offer flights from Montreal to Seattle?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Montreal and Seattle, with SkyTeam 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 $518 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 $816 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 travelers 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. Booking your flights between Montreal and SEA can sometimes prove cheaper using this method.

  • 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

Information on your arrival and departure airports

Montreal (YUL)
Seattle (SEA)