YUL - SEA

C$ 270 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 23/4. 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
5:30 p.m. - 8:28 p.m.YUL-SEA
29h 58m1 stop
1:50 p.m. - 12:43 a.m.SEA-YUL
7h 53m1 stop
C$ 491WestJet
Find Deal
Sun, 27 Apr - Sat, 3 May
6:45 a.m. - 8:43 a.m.YUL-SEA
28h 58m3 stops
8:56 p.m. - 12:39 a.m.SEA-YUL
24h 43m3 stops
C$ 498
Find Deal
Mon, 7 Apr - Mon, 14 Apr
6:05 a.m. - 4:55 p.m.YUL-SEA
13h 50m2 stops
9:25 a.m. - 11:38 p.m.SEA-YUL
11h 13m2 stops
C$ 668Delta
Find Deal
Wed, 2 Apr - Wed, 9 Apr
8:35 a.m. - 12:58 p.m.YUL-SEA
7h 23m1 stop
7:20 a.m. - 3:30 p.m.SEA-YUL
5h 10mdirect
C$ 691Air Canada
Find Deal
Sat, 31 May - Sun, 8 Jun
8:35 a.m. - 2:13 p.m.YUL-SEA
8h 38m1 stop
7:20 a.m. - 3:30 p.m.SEA-YUL
5h 10mdirect
C$ 698Air Canada
Find Deal
Sat, 31 May - Sun, 8 Jun
6:05 a.m. - 6:39 p.m.YUL-SEA
15h 34m2 stops
7:10 a.m. - 11:38 p.m.SEA-YUL
13h 28m2 stops
C$ 700Delta
Find Deal
Tue, 8 Apr - Thu, 10 Apr
9:15 a.m. - 12:59 a.m.YUL-SEA
18h 44m1 stop
7:20 a.m. - 3:30 p.m.SEA-YUL
5h 10mdirect
C$ 738United Airlines
Find Deal
Sat, 31 May - Sun, 8 Jun
4:45 p.m. - 7:37 p.m.YUL-SEA
5h 52mdirect
7:20 a.m. - 3:30 p.m.SEA-YUL
5h 10mdirect
C$ 747United Airlines
Find Deal
Sat, 31 May - Sun, 8 Jun
12:30 p.m. - 11:09 p.m.YUL-SEA
13h 39m1 stop
12:59 a.m. - 2:55 p.m.SEA-YUL
10h 56m1 stop
C$ 751American Airlines
Find Deal
Thu, 10 Apr - Wed, 16 Apr
3:44 p.m. - 12:51 a.m.YUL-SEA
12h 07m1 stop
12:59 a.m. - 2:55 p.m.SEA-YUL
10h 56m1 stop
C$ 754American Airlines
Find Deal
Mon, 7 Apr - Sun, 13 Apr

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 Wednesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Seattle, Sunday is the cheapest day to fly and Wednesday 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 C$ 665 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is C$ 927 and C$ 853 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 6 weeks before departure.

Good to know

Low season

November

High season

July

Cheapest flight

C$ 270
Best time to beat the crowds (7% less expensive on average)
Most popular time to fly (14% 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.

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 C$ 188 for a one-way ticket and C$ 342 for a round-trip.

  • 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, 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$ 685 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of C$ 776 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.

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 C$ 832 or less round-trip.

Prefer to fly direct from Montreal to Seattle?

Find which airlines fly direct from Montreal Pierre Elliott Trudeau Intl Airport to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl

Monday

Air Canada,United Airlines

Air Canada,United Airlines

Tuesday

Air Canada,United Airlines

Air Canada,United Airlines

Wednesday

Air Canada,United Airlines

Air Canada,United Airlines

Thursday

Air Canada,United Airlines

Air Canada,United Airlines

Friday

Air Canada,United Airlines

Air Canada,United Airlines

Saturday

Air Canada,United Airlines

Air Canada,United Airlines

Sunday

Air Canada,United Airlines

Air Canada,United Airlines

See more nonstop flights

Direct returns

Seattle/Tacoma Intl to Montreal Pierre Elliott Trudeau Intl

Monday

Air Canada,United Airlines

Air Canada,United Airlines

Tuesday

Air Canada,United Airlines

Air Canada,United Airlines

Wednesday

Air Canada,United Airlines

Air Canada,United Airlines

Thursday

Air Canada,United Airlines

Air Canada,United Airlines

Friday

Air Canada,United Airlines

Air Canada,United Airlines

Saturday

Air Canada,United Airlines

Air Canada,United Airlines

Sunday

Air Canada,United Airlines

Air Canada,United Airlines

See more nonstop flights
See more nonstop flights

Top 5 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.
8.0
DeltaOverall score based on 7973 reviews
8.2Boarding
8.5Crew
8.0Comfort
7.3Food
7.9Entertainment
Airline reviews

The WiFi didn't seem as fast as it normally is

10.0 ExcellentKristopher, Mar 2025AVL - ATL
Read more Delta reviews

The WiFi didn't seem as fast as it normally is

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

The crew was wonderful and attentive. The seats near exit row were restrictive. Offer healthy snacks please

Delta is a premier airline so my expectations are most always met.

Friendly and helpful crew. Had no issues at all other than the St Thomas airport is woefully small, so allow plenty of time. Flight was pretty smooth and we arrived earlier than planned.

Friendly crew, quick boarding. We even arrived a few minutes earlier than our original flight plan. No onboard screens, but it’s a relatively short flight so it’s not really an issue.

Seats are much much more comfortable than United, which is what I usually fly

Zero updates from the pilots for 30 minutes in the tarmac

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

I loved having a most black flight crew during Black History Month; rather by design or accident I appreciated the representation. ❤️

It was my first time with United Airlines and I would say it was very good experience and best of all the flights were on time. Will definitely fly with United Airlines next time.

headphone jack didnt work for the first flight and not much variety

The seats on this flight were almost roomy enough to be the basic amount needed for human existence. I think my favorite part of this flight was it landed at an A gate, which was the most palatial part of Sea-Tac I've ever seen - a massive improvement from the S gates.

The seats on this flight were almost roomy enough to be the basic amount needed for human existence.

Plane 3 hours late. Missed connection. No help from gate staff. App horrible. Lost connection repeatedly. No service desk. Finally got help from young girl driving cart.

Not as good as expected Air Can needs to improve totally rated on internet as worst

The flight was delayed, it took longer than anticipated because of weather, and they broke my luggage.

Everything was good. Flight was on time, luggage pickup was quick. The staff were great. Could not ask for anything more.

lots of delays the crew were unclear about where to pick up my carry-on, which they took from me to check in on the plane.

They needed people to check a bag, they did check my bag and I had to wait 10 minutes after the flight to get it it wasn’t too bad

Good experience but the snacks are not gluten free, so I cannot eat them.

Between Las Vegas and Dallas was okay But, once in the Dallas airport, notice, I have disability and ask for a wheelchair, they leave in a middle of nowhere, the personal in charge try to push me on a cart where I couldn't sit because was to high. Then they don't care about me, they bulling, till I start to yelling and crying, ask to everyone around, who can help me. The man in charge make a despective movements and said you are to loosing the fly. The last name in his batch started with an H, I did not have the full name. A nightmare. After all, a woman in charge was walking very slowly and asking me for a tip cause she was helping me to reach the fly. For years, AA has been the preferred airline. The personal in charge of the disabled people are discriminate me. Thank you Kayak.

Excellent! The gate agents were kind enough to rebook me on an earlier flight saving me from a 6 hour layover. Even my luggage made it despite the fact that the connection was technically too narrow. The flight itself was very comfortable, roomy, and clean. Plenty of space for my carryon items with plugs to charge my phone. After a long international flight of 14 hours, this was an excellent way to end my travels!

American Airlines Suck. AA did not deliver us to the airport we paid for to Tulum. Instead, we were flown into Cancun and had to take a shuttle to Tulum. Instead of arriving at 4 PM, we arrived at 11:30 PM - not to mention that our initial booked flight was due into Tulum at noon. The latter flight was canceled and rebooked (to the 4 PM arrival). We lost a day of vacation. Oh, I forgot that AA provided a lunch voucher for $12. Noting, the least expensive item on the menu at the airport restaurant was green beans for $9.99. The return flight from Tulum was delayed two or three times for no reason other than that it was NOT related to the weather. We arrived late for our connecting flight from DFW to STL. Luckily, the connecting flight was delayed. We hurried through Customs and ran through the airport to make our flight to STL (or we would have missed that flight).

This was an overnight flight. There was no meal service in first class, just a simple snack basket was offered along with beverages. There should have been some type of continental breakfast prior to arrival in PHL. As an Executive Platinum American Airlines Advantage member, I received no name recognition from the first class flight attendant. When disembarking at PHL, the flight attendants were more interested in their cell phones than saying "thank you" to the passengers as they disembarked.

Flight boarded from Gate 39 at OGG, the farthest gate in the terminal. There were no Hawaiian themed amenities for the flight. The first class service was mediocre at best; I received not special welcome or recognition as an executive platinum member of American Advantage program. The flight attendants were more concerned with their cell phones than saying "thank you" to the passengers as we disembarked. Fortunately, the flight arrived at LAX a few minutes early.

I was a little disappointed of not having an android charger. Only one it was for an iPhone. I've flown American in the past and had access to one.

The flight was quick and to the point. The crew just did their job w/o excessive talking and everything was just perfect.

My seat was horrible. I think it was broken in several places. Other than that, the crew was great and the plane was clean

Flight was late and missed connecting flight. They could have better accommodated, but instead did an overnight and had to arrive the next afternoon.

Will never book through you again. Very disappointed in the notices and action taken or provided when planes are rescheduled, enough to cause missed connections

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.

Mixed experienced. Nice staff. Spacious 787 better than cramped Airbus, though my seat was broken. The bad: Way overpriced ticket and charged for food despite 6 hr flight.

Very smooth flight and the crew members were very welcoming.

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.

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

Information on your arrival and departure airports

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