Cheap flights from Montreal to Seattle from C$ 180
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — SEA
31 Dec — 7 Jan1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Montreal to Seattle/Tacoma Intl are usually found in September or August, booked 34 days in advance, depart on a Friday or Tuesday and return on a Friday
Find flight deals from Montreal to Seattle
Enter your travel dates to find the best prices.
Cheapest flights from Montreal to Seattle
Explore the most affordable flight options available from Montreal to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 December 2025.
Sun 14/123:50 p.m.YUL - SEA
1 stop21h 08mAmerican Airlines
Mon 15/1210:07 p.m.SEA - YUL
1 stop12h 42mAmerican Airlines
Deal found 30/11C$ 419
Sun 14/1211:10 a.m.YUL - SEA
1 stop14h 06mAir Canada
Sat 10/18:10 a.m.SEA - YUL
1 stop8h 12mAir Canada
Deal found 28/11C$ 427
Tue 16/121:10 p.m.YUL - SEA
1 stop12h 06mAir Canada
Thu 8/18:10 a.m.SEA - YUL
2 stops9h 39mAir Canada
Deal found 28/11C$ 434
Mon 15/129:00 p.m.YUL - SEA
1 stop15h 31mAir Canada
Fri 9/18:10 a.m.SEA - YUL
1 stop12h 13mAir Canada
Deal found 28/11C$ 444
Mon 15/127:00 a.m.YUL - SEA
1 stop14h 49mAmerican Airlines
Mon 15/1210:07 p.m.SEA - YUL
1 stop12h 42mAmerican Airlines
Deal found 30/11C$ 469
Sun 14/126:45 a.m.YUL - SEA
1 stop15h 33mMultiple Airlines
Sat 10/16:34 p.m.SEA - YUL
2 stops33h 31mMultiple Airlines
Deal found 28/11C$ 488
Sun 14/126:45 p.m.YUL - SEA
1 stop20h 10mUnited Airlines
Fri 9/15:00 a.m.SEA - YUL
1 stop8h 58mUnited Airlines
Deal found 28/11C$ 489
Mon 22/125:25 p.m.YUL - SEA
1 stop19h 31mUnited Airlines
Sat 10/13:30 p.m.SEA - YUL
2 stops15h 50mUnited Airlines
Deal found 30/11C$ 490
Sun 14/127:00 a.m.YUL - SEA
1 stop13h 47mDelta
Thu 8/17:59 p.m.SEA - YUL
2 stops14h 33mDelta
Deal found 28/11C$ 499
Fri 5/1212:59 p.m.YUL - SEA
1 stop11h 51mAmerican Airlines
Fri 12/1210:58 p.m.SEA - YUL
1 stop13h 26mAmerican Airlines
Deal found 28/11C$ 508
Sun 14/127:00 a.m.YUL - SEA
1 stop13h 47mDelta
Fri 9/112:00 p.m.SEA - YUL
2 stops17h 44mDelta
Deal found 28/11C$ 560
Best flights from Montreal to Seattle
Discover carefully curated flight deals from Montreal to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 1 December 2025.
Mon 2/27:30 p.m.YUL - SEA
1 stop21h 49mWestJet
Sun 15/23:10 p.m.SEA - YUL
1 stop21h 03mWestJet
Deal found 30/11C$ 395
Wed 21/12:25 p.m.YUL - SEA
2 stops10h 41mAir Canada
Thu 22/110:05 a.m.SEA - YUL
1 stop7h 55mAir Canada
Deal found 28/11C$ 398
Wed 7/19:15 a.m.YUL - SEA
1 stop14h 42mUnited Airlines
Mon 12/111:45 p.m.SEA - YUL
1 stop10h 43mUnited Airlines
Deal found 29/11C$ 400
Sun 8/27:30 p.m.YUL - SEA
1 stop21h 49mWestJet
Sun 15/23:10 p.m.SEA - YUL
1 stop12h 55mWestJet
Deal found 30/11C$ 395
Wed 7/19:15 a.m.YUL - SEA
1 stop14h 42mUnited Airlines
Tue 13/111:45 p.m.SEA - YUL
1 stop10h 43mUnited Airlines
Deal found 29/11C$ 400
Fri 24/44:15 p.m.YUL - SEA
1 stop25h 19mWestJet
Mon 27/42:05 p.m.SEA - YUL
1 stop7h 37mWestJet
Deal found 29/11C$ 398
Sat 10/17:00 a.m.YUL - SEA
2 stops17h 15mUnited Airlines
Sat 17/112:40 p.m.SEA - YUL
2 stops21h 48mUnited Airlines
Deal found 29/11C$ 405
Mon 20/44:15 p.m.YUL - SEA
1 stop25h 04mWestJet
Sun 26/42:05 p.m.SEA - YUL
1 stop7h 37mWestJet
Deal found 29/11C$ 398
Fri 24/44:15 p.m.YUL - SEA
1 stop25h 19mWestJet
Fri 1/52:05 p.m.SEA - YUL
1 stop7h 37mWestJet
Deal found 29/11C$ 398
Thu 23/44:15 p.m.YUL - SEA
1 stop25h 04mWestJet
Wed 29/42:05 p.m.SEA - YUL
1 stop7h 37mWestJet
Deal found 29/11C$ 398
Mon 20/44:15 p.m.YUL - SEA
1 stop25h 04mWestJet
Fri 1/52:05 p.m.SEA - YUL
1 stop7h 37mWestJet
Deal found 29/11C$ 398
Direct flights from Montreal to Seattle
Explore direct flight options from Montreal to Seattle based on user searches, and compare prices and availability for your desired travel dates. Data last updated 1 December 2025.
Fri 8/54:45 p.m.YUL - SEA
Nonstop5h 56mAir Canada
Sat 16/58:20 a.m.SEA - YUL
Nonstop5h 09mAir Canada
Deal found 29/11C$ 634
Sun 10/54:45 p.m.YUL - SEA
Nonstop5h 56mAir Canada
Sun 17/58:20 a.m.SEA - YUL
Nonstop5h 09mAir Canada
Deal found 29/11C$ 714
Last-minute flights from Montreal to Seattle
Discover last-minute flight deals from Montreal to Seattle. Data last updated 1 December 2025 and is based on user searches.
Fri 5/1212:59 p.m.YUL - SEA
1 stop11h 51mAmerican Airlines
Fri 12/1210:58 p.m.SEA - YUL
1 stop13h 26mAmerican Airlines
Deal found 28/11C$ 508
Sun 14/123:50 p.m.YUL - SEA
1 stop21h 08mAmerican Airlines
Mon 15/1210:07 p.m.SEA - YUL
1 stop12h 42mAmerican Airlines
Deal found 30/11C$ 419
Sun 14/1211:10 a.m.YUL - SEA
1 stop14h 06mAir Canada
Sat 10/18:10 a.m.SEA - YUL
1 stop8h 12mAir Canada
Deal found 28/11C$ 427
Sun 14/126:45 a.m.YUL - SEA
1 stop15h 33mMultiple Airlines
Sat 10/16:34 p.m.SEA - YUL
2 stops33h 31mMultiple Airlines
Deal found 28/11C$ 488
Sun 14/126:45 p.m.YUL - SEA
1 stop20h 10mUnited Airlines
Fri 9/15:00 a.m.SEA - YUL
1 stop8h 58mUnited Airlines
Deal found 28/11C$ 489
Sun 14/127:00 a.m.YUL - SEA
1 stop13h 47mDelta
Thu 8/17:59 p.m.SEA - YUL
2 stops14h 33mDelta
Deal found 28/11C$ 499
Sun 14/127:00 a.m.YUL - SEA
1 stop13h 47mDelta
Fri 9/112:00 p.m.SEA - YUL
2 stops17h 44mDelta
Deal found 28/11C$ 560
Mon 15/129:00 p.m.YUL - SEA
1 stop15h 31mAir Canada
Fri 9/18:10 a.m.SEA - YUL
1 stop12h 13mAir Canada
Deal found 28/11C$ 444
Mon 15/127:00 a.m.YUL - SEA
1 stop14h 49mAmerican Airlines
Mon 15/1210:07 p.m.SEA - YUL
1 stop12h 42mAmerican Airlines
Deal found 30/11C$ 469
Tue 16/121:10 p.m.YUL - SEA
1 stop12h 06mAir Canada
Thu 8/18:10 a.m.SEA - YUL
2 stops9h 39mAir Canada
Deal found 28/11C$ 434
Mon 22/125:25 p.m.YUL - SEA
1 stop19h 31mUnited Airlines
Sat 10/13:30 p.m.SEA - YUL
2 stops15h 50mUnited Airlines
Deal found 30/11C$ 490
One-way flights from Montreal to Seattle
Search for one-way flight options from Montreal to Seattle. Find affordable one-way fares based on user searches. Data last updated 1 December 2025.
Wed 29/46:45 a.m.YUL - SEA
1 stop9h 23mWestJet
Deal found 28/11C$ 180
Thu 15/17:30 a.m.YUL - SEA
1 stop10h 01mAir Canada
Deal found 29/11C$ 211
Wed 14/17:30 p.m.YUL - SEA
1 stop21h 50mWestJet
Deal found 1/12C$ 217
Sun 22/36:45 a.m.YUL - SEA
2 stops34h 34mWestJet
Deal found 29/11C$ 224
Fri 1/56:45 a.m.YUL - SEA
1 stop16h 43mWestJet
Deal found 28/11C$ 225
Mon 2/24:15 p.m.YUL - SEA
1 stop25h 04mWestJet
Deal found 29/11C$ 229
Tue 13/12:25 p.m.YUL - SEA
2 stops10h 41mAir Canada
Deal found 30/11C$ 233
Tue 13/16:45 a.m.YUL - SEA
3 stops30h 08mMultiple Airlines
Deal found 29/11C$ 235
Sun 14/127:30 a.m.YUL - SEA
1 stop10h 01mAir Canada
Deal found 29/11C$ 236
Cheap flight deals from Montreal to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Montreal (YMQ) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 1 December 2025.
Customize your flight search to find flights from Montreal to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 1 December 2025.
Use the filters below to find and compare flights from Montreal to Seattle that are best for you.
Fly from
Montreal
Fly to
Seattle
Route
Depart
Return
Price
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Mon 2/2
7:30 p.m.-2:19 p.m.
1 stop21h 49m
Seattle/Tacoma Intl
Sun 15/2
3:10 p.m.-3:13 p.m.
1 stop21h 03m
C$ 395
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Sun 8/2
7:30 p.m.-2:19 p.m.
1 stop21h 49m
Seattle/Tacoma Intl
Sun 15/2
3:10 p.m.-7:05 a.m.
1 stop12h 55m
C$ 395
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Wed 21/1
2:25 p.m.-10:06 p.m.
2 stops10h 41m
Seattle/Tacoma Intl
Thu 22/1
10:05 a.m.-9:00 p.m.
1 stop7h 55m
C$ 398
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Fri 24/4
4:15 p.m.-2:34 p.m.
1 stop25h 19m
Seattle/Tacoma Intl
Mon 27/4
2:05 p.m.-12:42 a.m.
1 stop7h 37m
C$ 398
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Mon 20/4
4:15 p.m.-2:19 p.m.
1 stop25h 04m
Seattle/Tacoma Intl
Sun 26/4
2:05 p.m.-12:42 a.m.
1 stop7h 37m
C$ 398
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Fri 24/4
4:15 p.m.-2:34 p.m.
1 stop25h 19m
Seattle/Tacoma Intl
Fri 1/5
2:05 p.m.-12:42 a.m.
1 stop7h 37m
C$ 398
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Thu 23/4
4:15 p.m.-2:19 p.m.
1 stop25h 04m
Seattle/Tacoma Intl
Wed 29/4
2:05 p.m.-12:42 a.m.
1 stop7h 37m
C$ 398
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Mon 20/4
4:15 p.m.-2:19 p.m.
1 stop25h 04m
Seattle/Tacoma Intl
Fri 1/5
2:05 p.m.-12:42 a.m.
1 stop7h 37m
C$ 398
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Wed 7/1
9:15 a.m.-8:57 p.m.
1 stop14h 42m
Seattle/Tacoma Intl
Mon 12/1
11:45 p.m.-1:28 p.m.
1 stop10h 43m
C$ 400
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Wed 7/1
9:15 a.m.-8:57 p.m.
1 stop14h 42m
Seattle/Tacoma Intl
Tue 13/1
11:45 p.m.-1:28 p.m.
1 stop10h 43m
C$ 400
Flights are sorted by cheapest round-trip flights first.
Deals found on 29/11
Showing 1-10 of 21 results
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Best time to book a flight from Montreal to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Montreal with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Montreal to Seattle
How far ahead should I book a flight from Montreal to Seattle?
Use this chart to determine the optimal time to book a round-trip flight from Montreal to Seattle. Price data was last updated on 28 November 2025.
Booking 34 days in advance of your planned departure date is, on average, the best time to get cheap flights from Montreal to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Montreal to Seattle?
Currently, November is the cheapest month in which you can book a flight from Montreal to Seattle (average of C$ 284). Flying from Montreal to Seattle in January is currently the most expensive (average of C$ 514). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from YMQ to SEA?
Find hourly flight availability from Montreal to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 1 December 2025.
A simple way to save on the total cost of your ticket is to fly from Montreal to Seattle in the evening. If you’re flexible enough to do this you can expect to save up to 52% on your trip compared to booking a flight at noon.
What’s the top layover airport for flights from Montreal to Seattle?
Share of one-stop round-trip flights from Montreal to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.
Calgary (YYC) – chosen by Cheapflights users on 61% of one-stop itineraries from Montreal to Seattle on Cheapflights.
What’s the cheapest layover airport for flights from Montreal to Seattle?
Average round-trip fare for 1-stop flights from Montreal to Seattle, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 574.
What’s the fastest layover option from Montreal to Seattle?
Shortest average travel time for 1-stop one-way flights from Montreal to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Vancouver (YVR) have the shortest average one-way travel time for 1-stop routes: 8h 24m.
Which airport typically offers the quickest layover for flights from Montreal to Seattle?
Average layover duration for 1-stop one-way flights from Montreal to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Vancouver (YVR) offer the fastest connection on this route, with an average layover time of 1h 51m.
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 1 December 2025.
Read through reviews of airlines operating flights from Montreal to Seattle, such as United Airlines,WestJet, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Related info for your journey
Find useful and relevant information for your journey from Montreal to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What airport do you fly into for flights to Seattle from Montreal?
Located just 18.4 km from the city centre, Seattle/Tacoma Intl is the airport most travellers will use when flying to Seattle from Montreal. Booking flights from Montreal to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 0 daily inbound flights from Montreal from 5 different airlines.
How long is the flight from Montreal to Seattle?
Departing from Montreal to Seattle will take you 10h 41m. The distance from Montreal to Seattle is about 3663 km. Both multi-stop and direct flights can be found to your destination and back.
What are the cheapest airlines flying from Montreal to Seattle round-trip?
Delta, at C$ 284, was found to be the cheapest airline from Montreal to Seattle.Alternate airlines to your destination round-trip include WestJet and American Airlines. Delta is 62% cheaper than the average price of flights available within the next 90 days to this destination.
Can I find deals for business class flights from Montreal to Seattle?
Yes. Cheapflights offers flight deals from Montreal to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Montreal to Seattle?
Currently, November is the cheapest month in which you can book a flight from Montreal to Seattle (average of C$ 284). Flying from Montreal to Seattle in January is currently the most expensive (average of C$ 514). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Browse through other flights departing from Montreal. Flights are based on user searches made on Cheapflights and were last updated on 1 December 2025.
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 1 December 2025.
Discover the top 5 airlines that operate flights from Montreal to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 1 December 2025.
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Montreal to Seattle?
Cheapflights helps you search for flights from Montreal to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from Montreal to Seattle?
It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Montreal to Seattle.
Can Cheapflights find flights from Montreal to Seattle with no change fees?
Need flexible booking options for your flight to Seattle from Montreal? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.
Can Cheapflights notify me if prices for flights from Montreal to Seattle become cheaper?
Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!
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