Cheap flights from Montreal to Seattle from C$ 246
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — SEA
5 Oct — 12 Oct1
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 July, booked 20 days in advance, depart on a Wednesday or Thursday and return on a Tuesday
Cheap flight deals from Montreal to Seattle
Enter your travel dates to find the best prices.
Cheapest
Best
Last-minute
One-way
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 5 September 2026.
Sat 19/96:45 a.m. -
2 stops15h 00m
Tue 22/97:35 p.m. -
1 stop8h 30m
Deal found 1/9C$ 416
Thu 10/96:45 a.m. -
2 stops15h 00m
Wed 16/97:35 p.m. -
1 stop8h 30m
Deal found 1/9C$ 417
Tue 15/96:45 a.m. -
2 stops15h 00m
Tue 22/97:35 p.m. -
1 stop8h 30m
Deal found 4/9C$ 421
Thu 10/96:45 a.m. -
2 stops15h 00m
Fri 18/97:35 p.m. -
1 stop8h 30m
Deal found 2/9C$ 426
Fri 2/106:45 a.m. -
2 stops15h 00m
Fri 9/107:35 p.m. -
1 stop8h 30m
Deal found 4/9C$ 438
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 5 September 2026.
Sat 26/96:45 a.m. -
2 stops15h 00m
Fri 2/107:35 p.m. -
1 stop8h 30m
Deal found 31/8C$ 421
Sat 19/97:00 a.m. -
1 stop12h 07m
Tue 22/99:43 a.m. -
1 stop10h 44m
Deal found 1/9C$ 468
Wed 7/105:34 p.m. -
1 stop10h 02m
Sat 10/108:24 a.m. -
1 stop10h 06m
Deal found 2/9C$ 511
Tue 20/1011:23 a.m. -
1 stop9h 56m
Tue 27/106:30 a.m. -
1 stop12h 12m
Deal found 4/9C$ 543
Tue 29/1210:40 a.m. -
2 stops13h 19m
Mon 11/13:15 p.m. -
2 stops12h 55m
Deal found 2/9C$ 544
Wed 7/107:15 a.m. -
1 stop14h 30m
Sat 10/107:35 p.m. -
1 stop8h 30m
Deal found 4/9C$ 471
Mon 2/113:10 p.m. -
1 stop8h 49m
Sat 7/118:40 a.m. -
1 stop7h 55m
Deal found 1/9C$ 554
Tue 22/97:00 a.m. -
1 stop12h 45m
Wed 30/98:59 a.m. -
1 stop11h 51m
Deal found 3/9C$ 560
Wed 14/109:45 a.m. -
2 stops13h 52m
Sun 18/105:07 p.m. -
1 stop14h 33m
Deal found 2/9C$ 560
Mon 21/98:00 p.m. -
1 stop25h 45m
Wed 30/97:35 p.m. -
2 stops25h 50m
Deal found 3/9C$ 514
Last-minute flights from Montreal to Seattle
Discover last-minute flight deals from Montreal to Seattle. Data last updated 5 September 2026 and is based on user searches.
Thu 10/96:45 a.m. -
2 stops15h 00m
Wed 16/97:35 p.m. -
1 stop8h 30m
Deal found 1/9C$ 417
Thu 10/96:45 a.m. -
2 stops15h 00m
Fri 18/97:35 p.m. -
1 stop8h 30m
Deal found 2/9C$ 426
Tue 15/96:45 a.m. -
2 stops15h 00m
Tue 22/97:35 p.m. -
1 stop8h 30m
Deal found 4/9C$ 421
Sat 19/96:45 a.m. -
2 stops15h 00m
Tue 22/97:35 p.m. -
1 stop8h 30m
Deal found 1/9C$ 416
Fri 2/106:45 a.m. -
2 stops15h 00m
Fri 9/107:35 p.m. -
1 stop8h 30m
Deal found 4/9C$ 438
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 5 September 2026.
Wed 30/96:45 a.m. -
2 stops15h 00m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 4/9C$ 246
Wed 14/106:45 a.m. -
2 stops15h 00m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 3/9C$ 258
Wed 7/106:45 a.m. -
2 stops15h 00m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 3/9C$ 264
Thu 15/106:45 a.m. -
2 stops15h 00m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 3/9C$ 267
Sat 12/94:15 p.m. -
1 stop9h 42m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 2/9C$ 274
Fri 11/97:00 a.m. -
1 stop12h 07m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 1/9C$ 275
Fri 18/98:00 p.m. -
1 stop16h 40m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 3/9C$ 276
Sat 3/106:45 a.m. -
2 stops15h 00m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 1/9C$ 278
Fri 18/95:34 p.m. -
1 stop9h 37m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 2/9C$ 279
Fri 11/96:45 a.m. -
2 stops15h 00m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 1/9C$ 285
Fri 16/1012:44 p.m. -
1 stop12h 19m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 1/9C$ 286
Find 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 5 September 2026.
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 7,457,451 searches. Data last updated 5 September 2026.
Use the filters below to find and compare flights from Montreal to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest round-trip
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Wed 14/10
6:45 a.m.-6:45 p.m.
2 stops15h 00m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 258
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Wed 7/10
6:45 a.m.-6:45 p.m.
2 stops15h 00m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 264
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Fri 11/9
7:00 a.m.-4:07 p.m.
1 stop12h 07m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 275
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Mon 28/9
8:00 p.m.-9:40 a.m.
1 stop16h 40m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 279
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Fri 16/10
12:44 p.m.-10:03 p.m.
1 stop12h 19m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 286
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Sat 12/9
1:06 p.m.-9:36 p.m.
2 stops11h 30m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 287
Quickest round-trip
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Wed 14/10
5:34 p.m.-12:36 a.m.
1 stop10h 02m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 292
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Mon 21/9
8:00 p.m.-6:45 p.m.
1 stop25h 45m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 292
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Sun 27/9
8:00 p.m.-6:45 p.m.
1 stop25h 45m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 303
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Sat 26/9
6:45 a.m.-6:45 p.m.
2 stops15h 00m
Seattle/Tacoma Intl
Fri 2/10
7:35 p.m.-7:05 a.m.
1 stop8h 30m
C$ 421
Flights are sorted by cheapest round-trip flights first.
Deals found on 4/9
Showing 1-10 of 19 resultsSorted by cheapest first
1
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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.
YMQ-SEA
YUL-SEA
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
YMQ-SEA
YUL-SEA
What is the cheapest month to book a flight from Montreal to Seattle?
Currently, March is the cheapest month in which you can book a flight from Montreal to Seattle (average of C$ 631). Flying from Montreal to Seattle in June is currently the most expensive (average of C$ 835). 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.
How much does it cost to fly round-trip from Montreal to Seattle?
Airfare is below average for this route at the moment.
Montreal to Seattle flights typically cost between C$ 550 and C$ 742 in September.The cheapest round-trip price found within the last 5 days was C$ 416 on WestJet (19 Sep-22 Sep).
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 37% 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$ 520.
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 36m.
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 Chicago (ORD) offer the fastest connection on this route, with an average layover time of 1h 25m.
How far ahead should I book a flight from Montreal to Seattle?
Booking 45 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.
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 5 September 2026.
Read through reviews of airlines operating flights from Montreal to Seattle, such as Delta,United Airlines, andWestJet. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
I got middle seat, but it was cheap $340 for Taipei to PDX ,
Related info for your journey
Find useful and relevant information for your journey from Montreal to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What airport do you fly into for flights to Seattle from Montreal?
Located just 18.4 km from the city centre, Seattle/Tacoma Intl is the airport most travellers will use when flying to Seattle from Montreal. Booking flights from Montreal to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 0 daily inbound flights from Montreal from 5 different airlines.
How long is the flight from Montreal to Seattle?
Departing from Montreal to Seattle will take you 10h 02m. The distance from Montreal to Seattle is about 3663 km. Both multi-stop and direct flights can be found to your destination and back.
What are the cheapest airlines flying from Montreal to Seattle round-trip?
Delta, at C$ 281, 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 63% 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, March is the cheapest month in which you can book a flight from Montreal to Seattle (average of C$ 631). Flying from Montreal to Seattle in June is currently the most expensive (average of C$ 835). 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 5 September 2026.
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 5 September 2026.
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 7,457,451 searches. Data last updated 5 September 2026.
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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