YUL - SEA

$161 Find Cheap Flights from Montreal to Seattle

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 3/17. 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.
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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Montreal to Seattle, 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 Montreal to Seattle, as well as popular online travel agencies
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Cheap Flight Deals 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.

Recent round-trip flight deals from Montreal to Seattle

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Montreal to Seattle.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
7:00 am - 1:08 pmYUL-SEA
9h 08m1 stop
2:05 pm - 12:43 amSEA-YUL
7h 38m1 stop
$317WestJet
Find Deal
Thu, May 1 - Thu, May 8
3:55 pm - 7:09 pmYUL-SEA
30h 14m3 stops
9:48 am - 9:00 amSEA-YUL
20h 12m2 stops
Tue, Mar 18 - Tue, Mar 25
8:30 am - 12:58 pmYUL-SEA
7h 28m1 stop
5:40 am - 4:42 pmSEA-YUL
8h 02m1 stop
$410Air Canada
Find Deal
Thu, Jun 12 - Sun, Jun 15
12:49 pm - 10:21 pmYUL-SEA
12h 32m2 stops
7:10 am - 11:39 pmSEA-YUL
13h 29m2 stops
$427Delta
Find Deal
Tue, Mar 4 - Wed, Mar 12
4:45 pm - 7:37 pmYUL-SEA
5h 52mnonstop
7:20 am - 3:30 pmSEA-YUL
5h 10mnonstop
$431Air Canada
Find Deal
Thu, May 1 - Thu, May 8
4:50 pm - 10:25 pmYUL-SEA
8h 35m1 stop
7:10 am - 11:39 pmSEA-YUL
13h 29m2 stops
$441Delta
Find Deal
Tue, Mar 4 - Wed, Mar 12
8:05 am - 10:45 pmYUL-SEA
17h 40m1 stop
7:10 pm - 8:32 amSEA-YUL
10h 22m2 stops
$448United Airlines
Find Deal
Wed, Feb 26 - Tue, Mar 18
2:20 pm - 12:56 amYUL-SEA
13h 36m2 stops
12:25 am - 1:35 pmSEA-YUL
10h 10m2 stops
$452American Airlines
Find Deal
Thu, Feb 20 - Fri, Feb 28
1:15 pm - 10:51 pmYUL-SEA
12h 36m2 stops
5:00 am - 4:55 pmSEA-YUL
8h 55m1 stop
$456United Airlines
Find Deal
Fri, May 2 - Sun, May 11
7:30 am - 10:09 pmYUL-SEA
17h 39m1 stop
10:00 pm - 10:50 pmSEA-YUL
21h 50m1 stop
$459American Airlines
Find Deal
Thu, Feb 27 - Tue, Mar 11

Flights from Montreal to Seattle - Travel Insights & Trends

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.

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 Thursdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Seattle, Thursday 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?

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 October, where tickets cost $465 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $645 and $571 respectively.

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. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know

Low season

November

High season

August

Cheapest flight

$161
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 3% lower 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.

FAQs for booking Montreal to Seattle flights

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

    In the last 3 days, the lowest price for a flight from Montreal Pierre Elliott Trudeau Intl Airport to Seattle was $161 for a one-way ticket and $317 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 airlines offer Wi-Fi service onboard planes from Montreal to Seattle?

    Only Air Canada offers inflight Wi-Fi service on the Montreal to Seattle flight route.

  • 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?

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

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

    The two airlines most popular with KAYAK users for flights from Montreal to Seattle are WestJet and American Airlines. With an average price for the route of $479 and an overall rating of 7.2, WestJet is the most popular choice. American Airlines is also a great choice for the route, with an average price of $498 and an overall rating of 7.2.

  • 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.

See more FAQs

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

  • Looking for a cheap flight? 25% of our users found flights on this route for $348 or less one-way and $325 or less round-trip.

Top 3 airlines serving from Montreal to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Montreal to Seattle. 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 Montreal to Seattle? 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.
7.2
American AirlinesOverall score based on 10000 reviews
7.0Entertainment
8.0Crew
6.5Food
7.5Boarding
7.2Comfort
Airline reviews

I had two wonderful flights - very relaxing and got me there early!

10.0 ExcellentRachel, Feb 2025DCA - DFW
Read more American Airlines reviews

I had two wonderful flights - very relaxing and got me there early!

What, first class and not even a cup of coffee before landing at 5 am in First Class? Really?

The flight was just perfect! We left a few minutes early, had a smooth flight and fortunately had landed before the terrible accident that took off from North Philadelphia airport shortly thereafter.

Miami lounges were overcrowded and we were unable to get in. We only had a short time. But the banks are too tight in all American hubs

The food service is non existent. Crappy cookies and a drink. Plus no entertainment worked in whole row.

I was pleasantly surprised with an upgrade at boarding. I finally had a mostly gluten free food options and a very attentive attendant.

Cancelled and rebooked twice in one day with a drop in seat class. Not good at all.

Everything was excellent. I loved my flight Thank you so much 😊

Plane was pretty clean, staff was friendly and helpful, flight left about on time arrived early. Took a long time to board and get off the plane - carry on items didn't have enough room so people had to move all around to find places.

Flight delayed, missed connection, had to stay overnight. Next flight instead of our business class we were booked on the very back row. Second time this had happened in 2 months.

Lost my luggage. Filed a report and there is no response. Received a phone call from another airline that said they had the bag and they did not know what to do with it

Very good over all , would have been nice to have entertainment on the flight

Absolutely the worst airline I have ever taken. They lost my baggage and told me my bag tags had been cancelled. When my bags arrived days later I had to pick them up at 3:15 am. My return flight was delayed another 6 hours and they broke my bag. Westjet does nothing to try and make it a better customer experience and all the customers services representatives I spoke with were useless and incompetent. Never flying westjet again.

it's all good nothing you can do make better 😌

Very old planes. Seats were not comfortable. Air was not on during the flight leading to incredibly stuffy conditions.

It was so bad experience they wanted just charged passengers for any reason.

Delta was great. West Jet was not. I booked my flight in Sept (well over two months ago), but was told there were 2 reservations and NO tickets for me, my husband and 16mo daughter. We were unable to go ahold of West Jet over the phone and the kiosk was unhelpful so we had to buy completely new tickets in order to get home that day. I’ve called West Jet twice since and sat on the phone for over an hour without speaking to any representatives.

The seats were some of the most uncomfortable I've ever been on. Other similar-sized jets with the same seating arangement have been far more comfortable. This interfered with sleeping, so it was a big issue. Moreover, the lack of a digital boarding pass forced an extra trip to print one, and the overall digital experience was poor. WestJet's website could not figure out one of my flights existed.

The seats were some of the most uncomfortable I've ever been on. Other similar-sized jets with the same seating arangement have been far more comfortable. This interfered with sleeping, so it was a big issue.

flight was delayed and stewards were preoccupied and not helping passengers. The pilot was very communicative which was great. The window was dirty as were the back of the front seats with chewed gum and slime on it. I hope this helps.

My one complaint was that while we boarded using the standard enclosed gangway, when we arrived at SEATAC, the ground crew were slow to hook up the stairs. After reaching the tarmac we had to walk up a long ramp all outside in 35° weather. We just came from Bali and did not have warm weather clothes. This was in addition to having to collect our bags in Vancouver, take them through security again and then having to show our passports 4 more times all within the Air Canada section.

Super. Planes were clean. Flights were on time. boarding was smooth. Flight attendants were professional.

ground crew at Casablanca as well as at Montreal was not helpful at all. specially at Montreal airport, very rude .

3 hours late departure with no explanation. $160 luggage fee (two passengers) for less than 1 hour in the air!

The TSA people or whatever you call them were a bit rude- I asked why I had to take my shoes off bc I'm 75 and in the USA, I don't have to. The man didn't need to snap at me. It wasn't even busy! The plane was ok, a bit small for such a long flight, but I'm very familiar with the 737 used ( I fly it often between SFO and SAN) service was ok-nothing special. If I drank alcohol I guess I would be happy with free choices. the plane was HOT and even the FA commented on it. They tried to get it cooler, but it never happened.

I have flown on many airlines all over the world, and this plane flight was the most uncomfortable I have ever experienced.

After i biked my flights, i was informed my flight was rescheduled for later time

Flight from Minneapolis to Montreal was easy, breezy. Small plane, so not much overhead space. The seats felt slightly smaller than normal, but not uncomfortable for my body type. No screens in the seats for watching movies or shows, but I don't mind, I'm more of a reader.

Excellent overall experience. Seats were comfortable and ample leg room.

Con: Travelers shouldn't have to pay a fee for first checked bag, in any fare class. Pro: Plane was new and comfortable, even for the seats that didn't cost extra.

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

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