SEA - YUL

$151 Find Cheap Flights from Seattle to Montreal

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Montreal departing on 5/12. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Montreal Pierre Elliott Trudeau Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Montreal, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Montreal, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$341
Typical prices: $667-$281
WestJet
mar. 5/5sáb. 5/9
SEA - YUL • 1 stop
Cheapest one-way
$151
Typical prices: $273-$621
WestJet
mar. 5/12
SEA - YUL • 1 stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
United's Economy Plus offers six extra inches of legroom.
Use SEA Spot Saver for faster security at Seattle.
Expert advice
Expert advice
Expert advice
Expert advice
Top layover airports
Cheapest • Avg $491 (round-trip)
Shortest trip • 7h 50m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 8 weeks in advance save around 54% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 36% price drop
Most popular
Good to know
Good to know
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+1
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Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Seattle to Montreal (SEA-YUL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Montreal 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 Seattle to Montreal

mar., may. 5 - sáb., may. 9
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
$341WestJet
mar., may. 5 - sáb., may. 9
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
$350WestJet
dom., jun. 14 - sáb., jun. 20
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
$351WestJet
sáb., jun. 13 - sáb., jun. 20
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
$352WestJet
vie., jun. 19 - lun., jun. 22
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
$354WestJet
jue., jun. 18 - sáb., jun. 20
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
$357WestJet
lun., abr. 27 - mar., may. 5
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
8:00 pm - 9:40 am
YUL
-
SEA
16h 40m
1 stop
$362WestJet
mar., may. 5 - sáb., may. 9
WestJet Logo
10:30 am - 12:25 am
SEA
-
YUL
10h 55m
2 stops
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
$363WestJet
mar., may. 5 - sáb., may. 9
WestJet Logo
7:35 pm - 7:05 am
SEA
-
YUL
8h 30m
1 stop
WestJet Logo
5:30 pm - 9:40 am
YUL
-
SEA
19h 10m
1 stop
$364WestJet
mié., may. 13 - mié., may. 20
WestJet Logo
10:30 am - 12:25 am
SEA
-
YUL
10h 55m
2 stops
WestJet Logo
6:45 am - 6:45 pm
YUL
-
SEA
15h 00m
2 stops
$366WestJet
Booking Insights

KAYAK's insights & trends for Seattle to Montreal flights

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

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

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

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

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

Your flight ticket price will generally be cheaper if you fly to Montreal on a Monday and more expensive on a Friday. On your return trip to Seattle, you should consider flying back on a Monday, and avoid Wednesdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport, 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 Seattle to Montreal Pierre Elliott Trudeau Intl Airport is May, where tickets cost $411 (return) on average. On the other hand, the most expensive months are January and December, where the average cost of round-trip tickets is $1,002 and $833 respectively.

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

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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $593 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport, 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 Seattle to Montreal Pierre Elliott Trudeau Intl Airport, you should book around 8 weeks before departure, which saves you about 54% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Expert advice

Expert advice for your flight from Seattle to Montreal

 
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.

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.

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.

Good to know

Low seasonJanuary
Cheapest flight$151
Best time to beat the crowds but there is an average 56% increase in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Seattle to Montreal

When to book flights from Seattle to Montreal

Are your dates flexible? Find out the best times to travel from Seattle to Montreal 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 Seattle to Montreal flights

  • What is the cheapest flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?

    In the last 3 days, the lowest price for a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport was $157 for a one-way ticket and $336 for a round-trip.

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

    Yes

  • Which airports will I be using when flying from Seattle to Montreal?

    Seattle and Montreal are both served by 1 main airport. You will leave Seattle from Seattle/Tacoma Intl and will be arriving at Montreal Pierre Elliott Trudeau Intl.

  • Which airlines offer Wi-Fi service onboard planes from Seattle to Montreal?

    Lufthansa, United Airlines, Air Canada, and Air France offer inflight Wi-Fi service on the Seattle to Montreal flight route.

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

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

  • Which airline alliances offer flights from Seattle to Montreal?

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

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

    The two airlines most popular with KAYAK users for flights from Seattle to Montreal are Delta and United Airlines. With an average price for the route of $660 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $660 and an overall rating of 7.4.

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

    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 Seattle to Montreal.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Montreal from Seattle 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 Seattle to Montreal?

    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 Montreal with an airline and back to Seattle with another airline. Booking your flights between Seattle and YUL 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 Seattle to Montreal?

    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 Montreal from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $279 or less one-way.

Reviews of the top 4 airlines serving from Seattle to Montreal

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Montreal. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Montreal? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8367 reviews
7.9Comfort
8.1Boarding
7.8Entertainment
7.2Food
8.5Crew
Airline reviews

During the flight, the only refreshments provided were crackers and soft drinks; no substantial food was offered despite the international route. Furthermore, our initial flight was delayed, causing us to miss the connecting flight in Atlanta. The airline did not hold the connection, and we were informed that the next available flight is not for another 24 hours. While I am aware of alternative options via JetBlue, they operate out of JFK, which is not a viable solution for us as a resident of New Jersey.

2.0 MediocreEdward, Mar 2026
ATL - EWR
Read more Delta reviews

During the flight, the only refreshments provided were crackers and soft drinks; no substantial food was offered despite the international route. Furthermore, our initial flight was delayed, causing us to miss the connecting flight in Atlanta. The airline did not hold the connection, and we were informed that the next available flight is not for another 24 hours. While I am aware of alternative options via JetBlue, they operate out of JFK, which is not a viable solution for us as a resident of New Jersey.

Arlene was a great flight attendant. I also liked how one of the other flight attendants gave us a heads up about snacks and asked everyone to remove their headphones when it was their turn to order. Good idea.

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

I haven’t flown economy in over 20 years but it was not bad. Room by my feet for my bag and seat was roomy enough. Surprised in a good way.

The flight was delayed 90 minutes The Gate was wrong The Restroom on Aircraft was not clean There was a half used water bottle in my seat

Snacks and included beverages were appreciated. Boarding went smoothly. Plenty of overhead bin space. Seats get very uncomfortable after a couple of hours. After waiting 10 painful minutes for my walker, a very nice Delta guest agent pushed me in a wheelchair to the gate. It was finally delivered to me after another 15 minutes . Our checked bag was on the carousel long b4 I was able to retrieve it. Fortunately it was still there but somewhere along the way the straps we used to secure it were removed and and were not reattached. Wish I had made note of the agents name.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

The cabin temperature was nice and cool. The wifi was not working.

Could not get my connecting flight boarding pass until four hrs before departure! Ver annoying especially since the staff could not explain why!

First flight out and was 85 minutes delayed. Notification came out way too late

ticket agent lady wás very helpful , she arranged wheel chair for my elderly mother

Entertainment kept turning itself off. Gave up on watching a movie.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Not United Airlines' fault. It's ORL airport's fault.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

Very nice flight love the small aircraft. We had a wonderful flight attendant. Nice to see someone that really enjoys her job. Don't have her name but had a southern accent.

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

Flight was good but there are way to many announcements for credit cards etc.

No pre boarding kiosk to check in, baggage claim detected luggage didn’t leave the airport, poorly managed recovery of lost luggage, and blame lost tag from conveyor to TSA/security, very poor from TSA/security check to delivery, crucial if compensation will go thru and will likely wait for months unlike United,

Flight was good, crew was excellent. No complaints at all

Delayed 3 times in a row for 4 hours total. Incrementally pushing back the flight claiming gate delays but they eventually changed the actual plane, due to technical issues. This strategy to avoid compensation to passengers is unprofessional.

I didn't think about not having the right app for wifi because my connecting flight was with Westjet and when I took off from Seattle I was thinking I would use my wifi, but realized I couldn't on my Westjet app and I did not have Delta's app downloaded.

Plane seating was uncomfortable, very tight fitting for someone my height, did not recline and overall un enjoyable

Everything was good except for flight delay, but it was because of the snow storm in the arrival airport.

No communication from Kayak or West Jet. Booked extra flights, flights cancelled, no one answers calls. Will be disputing charges.

The trip from LAX to Calgary was aboard a 737-700, which is more than twenty years old. Service was fine, and the food was good, but there was no inflight entertainment, and no WiFi. The flight from Calgary to Vancouver was also delayed more than an hour, due to congestion on the Calgary tarmac. And no food service, but there was in-flight WiFi which made a big difference.

Leg room is a problem the plane was dirty and there were no movies available on the app

The personal item sizer cannot take a standard backpack, and the cabin luggage sizer cannot take a standard carry-on. Designed for people from the island of Lilliput!!. and also compels people to pay additional fees to check their bags. Making money by ticking off the passengers is a very short-sighted business strategy, especially since they have a choice of carriers

My wallet was stolen while I was sleeping on the plane.

I checked a bag and there was only one agent to assist all customers with any issues.

Great setup on both flights except the last flight we got condensed dripping all over me in the last 20 mins of the flight

Couldn't fit knees, only 1 toilet working, didn't get anything to drink cause the stewards were not able to get to us

Our biggest complaint about Air Canada is that if you don’t like your seat during check-in, there’s a fee to move elsewhere. On our flight from YUL to FFL, we were charged to change seats—just regular seats. What’s maddening is that the plane wasn’t even full; there were even a few people sleeping in the middle row sections (entire rows, completely empty), using them as beds. In my opinion, charging passengers for seat changes is a cash grab by Air Canada. They are definitely not the airline they were back in the day. I suppose they need to gouge the consumer now that they pay their attendants while on ground. One out of 10.

Allow me to book extra bag check in as free though I packed in 1 luggage but that was 7 LBS overweight so make another bag to free check in.

Plane left an hour late, I missed my connection and my bow case was never even loaded on the plane in VA. I deal with this type of nonsense everytime I fly air canada.

It was a smooth flight both in the sky and landing!

Fare was great, seat comfort the opposite as cushion was worn out. Ok for 2 hour flight, not for 4.5 hour flight..

For the price, it was a really good experience. There was no entertainment on board, so I couldn't really rate this, and I didn't order a meal. I appreciated that there was a free glass of wine.

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

Information on your arrival and departure airports