Cheap flights from Montreal to Seattle from C$ 331
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 13/12. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — SEA
18 Nov — 25 Nov1
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 October or September, booked 12 days in advance, depart on a Tuesday or Monday and return on a Monday
Cheap flight deals from Montreal to Seattle
Enter your travel dates to find the best prices.
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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 19 October 2026.
Wed 28/106:00 a.m. -
1 stop11h 45m
Sat 31/106:00 a.m. -
1 stop7h 15m
Deal found 14/10C$ 584
Thu 19/117:10 a.m. -
1 stop13h 00m
Wed 25/118:25 a.m. -
1 stop12h 23m
Deal found 16/10C$ 604
Mon 16/117:00 a.m. -
1 stop12h 38m
Mon 23/1111:15 p.m. -
1 stop9h 37m
Deal found 17/10C$ 605
Thu 10/122:24 p.m. -
1 stop11h 45m
Tue 5/111:59 p.m. -
1 stop8h 31m
Deal found 19/10C$ 609
Tue 1/124:15 p.m. -
1 stop24h 25m
Mon 7/122:30 p.m. -
1 stop21h 20m
Deal found 19/10C$ 623
Wed 2/121:04 p.m. -
2 stops14h 43m
Wed 9/126:20 a.m. -
2 stops13h 28m
Deal found 17/10C$ 630
Sun 15/116:00 a.m. -
1 stop11h 50m
Tue 17/111:35 p.m. -
1 stop6h 52m
Deal found 15/10C$ 635
Fri 20/1112:44 p.m. -
1 stop14h 13m
Sun 29/118:25 a.m. -
1 stop12h 23m
Deal found 16/10C$ 637
Sun 20/127:00 a.m. -
1 stop12h 53m
Fri 1/18:00 a.m. -
1 stop12h 58m
Deal found 17/10C$ 639
Mon 30/116:45 a.m. -
2 stops33h 55m
Mon 7/122:30 p.m. -
1 stop21h 20m
Deal found 19/10C$ 659
Fri 13/1112:44 p.m. -
1 stop14h 13m
Mon 16/118:25 a.m. -
1 stop12h 23m
Deal found 16/10C$ 668
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 19 October 2026.
Fri 8/16:00 a.m. -
1 stop11h 43m
Sat 16/19:20 p.m. -
1 stop13h 19m
Deal found 15/10C$ 602
Fri 8/12:25 p.m. -
1 stop11h 02m
Sat 16/111:59 p.m. -
2 stops12h 25m
Deal found 15/10C$ 622
Thu 19/117:10 a.m. -
1 stop13h 00m
Wed 25/118:25 a.m. -
1 stop12h 23m
Deal found 16/10C$ 604
Wed 2/1212:50 p.m. -
1 stop12h 14m
Wed 9/128:30 a.m. -
1 stop12h 18m
Deal found 17/10C$ 605
Thu 10/126:00 a.m. -
1 stop12h 03m
Mon 14/129:50 a.m. -
1 stop10h 43m
Deal found 17/10C$ 605
Tue 17/114:50 p.m. -
1 stop8h 08m
Tue 24/119:45 a.m. -
1 stop10h 42m
Deal found 18/10C$ 639
Thu 25/312:45 p.m. -
1 stop14h 04m
Mon 29/39:20 p.m. -
1 stop11h 24m
Deal found 19/10C$ 639
Mon 30/117:10 a.m. -
1 stop13h 00m
Mon 7/129:50 a.m. -
1 stop10h 43m
Deal found 15/10C$ 687
Tue 24/117:00 a.m. -
1 stop12h 38m
Thu 26/1111:15 p.m. -
1 stop9h 37m
Deal found 17/10C$ 688
Thu 26/116:00 a.m. -
1 stop11h 55m
Sun 29/118:25 a.m. -
1 stop12h 23m
Deal found 18/10C$ 690
Last-minute flights from Montreal to Seattle
Discover last-minute flight deals from Montreal to Seattle. Data last updated 19 October 2026 and is based on user searches.
Wed 28/106:00 a.m. -
1 stop11h 45m
Sat 31/106:00 a.m. -
1 stop7h 15m
Deal found 14/10C$ 584
Fri 13/1112:44 p.m. -
1 stop14h 13m
Mon 16/118:25 a.m. -
1 stop12h 23m
Deal found 16/10C$ 668
Sun 15/116:00 a.m. -
1 stop11h 50m
Tue 17/111:35 p.m. -
1 stop6h 52m
Deal found 15/10C$ 635
Mon 16/117:00 a.m. -
1 stop12h 38m
Mon 23/1111:15 p.m. -
1 stop9h 37m
Deal found 17/10C$ 605
Tue 17/114:50 p.m. -
1 stop8h 08m
Tue 24/119:45 a.m. -
1 stop10h 42m
Deal found 18/10C$ 639
Wed 18/117:30 a.m. -
1 stop10h 07m
Tue 1/123:15 p.m. -
2 stops12h 55m
Deal found 19/10C$ 670
Thu 19/117:10 a.m. -
1 stop13h 00m
Wed 25/118:25 a.m. -
1 stop12h 23m
Deal found 16/10C$ 604
Fri 20/1112:44 p.m. -
1 stop14h 13m
Sun 29/118:25 a.m. -
1 stop12h 23m
Deal found 16/10C$ 637
Mon 30/116:45 a.m. -
2 stops33h 55m
Mon 7/122:30 p.m. -
1 stop21h 20m
Deal found 19/10C$ 659
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 19 October 2026.
Sun 13/124:15 p.m. -
1 stop24h 25m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 15/10C$ 331
Tue 26/18:00 p.m. -
2 stops20h 40m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 18/10C$ 337
Sun 13/127:10 a.m. -
1 stop13h 00m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 15/10C$ 343
Thu 17/1212:50 p.m. -
1 stop12h 14m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 19/10C$ 344
Thu 17/126:45 a.m. -
2 stops33h 55m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 17/10C$ 346
Sun 11/46:45 a.m. -
2 stops34h 55m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 16/10C$ 348
Wed 10/38:00 p.m. -
2 stops20h 40m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 16/10C$ 351
Sun 13/127:33 a.m. -
2 stops11h 25m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 15/10C$ 355
Wed 2/121:04 p.m. -
2 stops14h 43m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 18/10C$ 357
Tue 5/18:00 p.m. -
2 stops44h 40m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 15/10C$ 374
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 19 October 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 19 October 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
Sun 13/12
4:15 p.m.-1:40 p.m.
1 stop24h 25m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 331
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Tue 5/1
7:00 a.m.-4:35 p.m.
1 stop12h 35m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 343
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Wed 10/3
7:00 a.m.-4:35 p.m.
1 stop12h 35m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 343
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Sun 11/4
12:45 p.m.-10:05 p.m.
1 stop12h 20m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 343
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Sun 13/12
7:10 a.m.-5:10 p.m.
1 stop13h 00m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 343
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Wed 2/12
12:50 p.m.-10:04 p.m.
1 stop12h 14m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 344
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Thu 17/12
6:00 a.m.-3:03 p.m.
1 stop12h 03m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 344
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Tue 10/11
12:50 p.m.-9:58 p.m.
1 stop12h 08m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 384
Quickest round-trip
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Sat 14/11
4:50 p.m.-9:58 p.m.
1 stop8h 08m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 386
MontrealSeattle
YUL Montreal Pierre Elliott Trudeau Intl - SEA Seattle/Tacoma Intl
YULSEA
Montreal Pierre Elliott Trudeau Intl
Wed 30/12
6:45 a.m.-1:40 p.m.
2 stops33h 55m
Seattle/Tacoma Intl
Wed 31/12
12:00 a.m.-3:00 a.m.
Nonstop0h 00m
C$ 396
Flights are sorted by cheapest round-trip flights first.
Deals found on 15/10
Showing 1-10 of 21 resultsSorted by cheapest first
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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, October is the cheapest month in which you can book a flight from Montreal to Seattle (average of C$ 609). Flying from Montreal to Seattle in June is currently the most expensive (average of C$ 841). 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 typical for this route at the moment.
Montreal to Seattle flights typically cost between C$ 522 and C$ 588 in February.The cheapest round-trip price found within the last 5 days was C$ 523 on WestJet (4 Feb-7 Feb).
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.
Vancouver (YVR) – 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$ 450.
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 43m.
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 46 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 19 October 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 $340 for Taipei to PDX ,
Related info for your journey
Find useful and relevant information for your journey from Montreal to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What airport do you fly into for flights to Seattle from Montreal?
Located just 18.4 km from the city centre, Seattle/Tacoma Intl is the airport most travellers will use when flying to Seattle from Montreal. Booking flights from Montreal to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 0 daily inbound flights from Montreal from 4 different airlines.
How long is the flight from Montreal to Seattle?
Departing from Montreal to Seattle will take you 11h 43m. The distance from Montreal to Seattle is about 3663 km.
What are the cheapest airlines flying from Montreal to Seattle round-trip?
Delta, at C$ 287, was found to be the cheapest airline from Montreal to Seattle.Alternate airlines to your destination round-trip include WestJet and United Airlines. Delta is 62% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest flights from Montreal to Seattle?
While on average a flight from Montreal to Seattle is generally C$ 873, our data shows the cheapest flight currently is C$ 676. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Seattle/Tacoma Intl), you can expect to pay C$ 605 for that flight.
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, October is the cheapest month in which you can book a flight from Montreal to Seattle (average of C$ 609). Flying from Montreal to Seattle in June is currently the most expensive (average of C$ 841). 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 19 October 2026.
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 19 October 2026.
Discover the top 4 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 19 October 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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