Cheap flights from Montreal to Seattle from C$ 220
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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — SEA
27 Jan — 3 Feb1
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 Monday and return on a Friday
Cheap 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 28 December 2025.
Mon 29/122:40 p.m.YUL - SEA
1 stop11h 51mDelta
Sat 31/111:10 p.m.SEA - YUL
1 stop9h 54mDelta
Deal found 26/12C$ 921
Mon 29/127:30 a.m.YUL - SEA
1 stop17h 34mAmerican Airlines
Sat 31/17:52 p.m.SEA - YUL
2 stops13h 32mAmerican Airlines
Deal found 26/12C$ 965
Mon 29/121:15 p.m.YUL - SEA
2 stops12h 01mAir Canada
Sat 31/15:50 a.m.SEA - YUL
2 stops13h 32mAir Canada
Deal found 26/12C$ 981
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 28 December 2025.
Thu 30/46:45 a.m.YUL - SEA
1 stop9h 23mWestJet
Sun 10/57:05 a.m.SEA - YUL
1 stop14h 37mWestJet
Deal found 26/12C$ 364
Fri 1/56:45 a.m.YUL - SEA
2 stops33h 23mWestJet
Fri 8/57:05 a.m.SEA - YUL
1 stop14h 37mWestJet
Deal found 26/12C$ 365
Sun 1/26:45 a.m.YUL - SEA
2 stops34h 34mWestJet
Sun 8/23:10 p.m.SEA - YUL
1 stop12h 55mWestJet
Deal found 26/12C$ 365
Thu 19/27:30 p.m.YUL - SEA
1 stop21h 49mWestJet
Thu 26/23:10 p.m.SEA - YUL
1 stop12h 55mWestJet
Deal found 28/12C$ 366
Tue 14/46:45 a.m.YUL - SEA
2 stops34h 34mWestJet
Tue 21/43:10 p.m.SEA - YUL
2 stops30h 28mWestJet
Deal found 25/12C$ 369
Fri 1/55:30 p.m.YUL - SEA
1 stop22h 38mWestJet
Wed 6/52:05 p.m.SEA - YUL
1 stop7h 37mWestJet
Deal found 26/12C$ 370
Wed 29/46:45 a.m.YUL - SEA
1 stop9h 23mWestJet
Fri 8/57:05 a.m.SEA - YUL
1 stop14h 37mWestJet
Deal found 26/12C$ 370
Thu 22/16:45 a.m.YUL - SEA
2 stops34h 35mWestJet
Sun 25/13:10 p.m.SEA - YUL
1 stop12h 55mWestJet
Deal found 26/12C$ 374
Wed 29/46:45 a.m.YUL - SEA
1 stop9h 23mWestJet
Sat 9/57:05 a.m.SEA - YUL
2 stops14h 35mWestJet
Deal found 26/12C$ 383
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 28 December 2025.
Sat 6/64:45 p.m.YUL - SEA
Nonstop5h 52mAir Canada
Thu 11/67:15 a.m.SEA - YUL
Nonstop5h 22mAir Canada
Deal found 25/12C$ 586
Sun 3/54:45 p.m.YUL - SEA
Nonstop5h 52mAir Canada
Thu 7/57:15 a.m.SEA - YUL
Nonstop5h 22mAir Canada
Deal found 26/12C$ 589
Thu 4/64:45 p.m.YUL - SEA
Nonstop5h 52mAir Canada
Sat 13/67:15 a.m.SEA - YUL
Nonstop5h 22mAir Canada
Deal found 26/12C$ 605
Wed 13/54:45 p.m.YUL - SEA
Nonstop5h 52mAir Canada
Sat 23/57:15 a.m.SEA - YUL
Nonstop5h 22mAir Canada
Deal found 26/12C$ 720
Sat 9/54:45 p.m.YUL - SEA
Nonstop5h 52mAir Canada
Mon 18/57:15 a.m.SEA - YUL
Nonstop5h 22mAir Canada
Deal found 26/12C$ 775
Sun 10/54:45 p.m.YUL - SEA
Nonstop5h 52mAir Canada
Mon 18/57:15 a.m.SEA - YUL
Nonstop5h 22mAir Canada
Deal found 26/12C$ 842
Fri 15/54:45 p.m.YUL - SEA
Nonstop5h 52mAir Canada
Mon 18/57:15 a.m.SEA - YUL
Nonstop5h 22mAir Canada
Deal found 27/12C$ 944
Last-minute flights from Montreal to Seattle
Discover last-minute flight deals from Montreal to Seattle. Data last updated 28 December 2025 and is based on user searches.
Thu 15/17:30 a.m.YUL - SEA
1 stop10h 01mAir Canada
Thu 22/18:10 a.m.SEA - YUL
1 stop8h 48mAir Canada
Deal found 28/12C$ 484
Thu 15/16:00 a.m.YUL - SEA
2 stops18h 58mUnited Airlines
Thu 22/13:30 p.m.SEA - YUL
2 stops20h 46mUnited Airlines
Deal found 28/12C$ 493
Tue 20/16:45 a.m.YUL - SEA
2 stops34h 35mWestJet
Thu 22/13:10 p.m.SEA - YUL
1 stop12h 55mWestJet
Deal found 26/12C$ 365
Thu 22/17:30 p.m.YUL - SEA
1 stop21h 50mWestJet
Sun 25/13:10 p.m.SEA - YUL
1 stop12h 55mWestJet
Deal found 27/12C$ 362
Fri 23/17:30 p.m.YUL - SEA
1 stop22h 08mMultiple Airlines
Sat 31/111:05 p.m.SEA - YUL
2 stops29h 00mMultiple Airlines
Deal found 25/12C$ 470
Sat 24/17:30 a.m.YUL - SEA
1 stop10h 01mAir Canada
Thu 29/19:55 a.m.SEA - YUL
1 stop8h 00mAir Canada
Deal found 26/12C$ 476
Mon 26/17:30 p.m.YUL - SEA
2 stops16h 28mMultiple Airlines
Wed 28/111:05 p.m.SEA - YUL
1 stop14h 22mMultiple Airlines
Deal found 27/12C$ 489
Thu 29/16:45 a.m.YUL - SEA
1 stop15h 32mMultiple Airlines
Wed 4/27:55 a.m.SEA - YUL
1 stop13h 43mMultiple Airlines
Deal found 26/12C$ 482
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 28 December 2025.
Mon 2/24:15 p.m.YUL - SEA
1 stop25h 04mWestJet
Deal found 27/12C$ 220
Mon 9/26:45 a.m.YUL - SEA
2 stops34h 34mWestJet
Deal found 27/12C$ 227
Thu 2/46:45 a.m.YUL - SEA
2 stops34h 34mWestJet
Deal found 25/12C$ 258
Fri 16/17:30 p.m.YUL - SEA
2 stops17h 52mWestJet
Deal found 26/12C$ 264
Fri 16/17:30 a.m.YUL - SEA
1 stop10h 01mAir Canada
Deal found 26/12C$ 275
Mon 9/24:10 p.m.YUL - SEA
1 stop9h 06mAir Canada
Deal found 26/12C$ 279
Tue 10/26:45 a.m.YUL - SEA
1 stop15h 32mMultiple Airlines
Deal found 27/12C$ 280
Wed 28/16:45 a.m.YUL - SEA
3 stops29h 51mMultiple Airlines
Deal found 27/12C$ 282
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 28 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 28 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
Thu 30/4
6:45 a.m.-1:08 p.m.
1 stop9h 23m
Seattle/Tacoma Intl
Sun 10/5
7:05 a.m.-12:42 a.m.
1 stop14h 37m
C$ 364
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Fri 1/5
6:45 a.m.-1:08 p.m.
2 stops33h 23m
Seattle/Tacoma Intl
Fri 8/5
7:05 a.m.-12:42 a.m.
1 stop14h 37m
C$ 365
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Sun 1/2
6:45 a.m.-2:19 p.m.
2 stops34h 34m
Seattle/Tacoma Intl
Sun 8/2
3:10 p.m.-7:05 a.m.
1 stop12h 55m
C$ 365
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Thu 19/2
7:30 p.m.-2:19 p.m.
1 stop21h 49m
Seattle/Tacoma Intl
Thu 26/2
3:10 p.m.-7:05 a.m.
1 stop12h 55m
C$ 366
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Tue 14/4
6:45 a.m.-2:19 p.m.
2 stops34h 34m
Seattle/Tacoma Intl
Tue 21/4
3:10 p.m.-12:38 a.m.
2 stops30h 28m
C$ 369
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Fri 1/5
5:30 p.m.-1:08 p.m.
1 stop22h 38m
Seattle/Tacoma Intl
Wed 6/5
2:05 p.m.-12:42 a.m.
1 stop7h 37m
C$ 370
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Wed 29/4
6:45 a.m.-1:08 p.m.
1 stop9h 23m
Seattle/Tacoma Intl
Fri 8/5
7:05 a.m.-12:42 a.m.
1 stop14h 37m
C$ 370
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Thu 22/1
6:45 a.m.-2:20 p.m.
2 stops34h 35m
Seattle/Tacoma Intl
Sun 25/1
3:10 p.m.-7:05 a.m.
1 stop12h 55m
C$ 374
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Wed 29/4
6:45 a.m.-1:08 p.m.
1 stop9h 23m
Seattle/Tacoma Intl
Sat 9/5
7:05 a.m.-12:40 a.m.
2 stops14h 35m
C$ 383
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Mon 2/2
4:15 p.m.-2:19 p.m.
1 stop25h 04m
C$ 220
Flights are sorted by cheapest round-trip flights first.
Deals found on 25/12
Showing 1-10 of 16 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 26 December 2025.
Booking 29 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$ 277). Flying from Montreal to Seattle in January is currently the most expensive (average of C$ 503). 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’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 58% 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$ 548.
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 28 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.
I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
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 9h 23m. The distance from Montreal to Seattle is about 3663 km.
What are the cheapest airlines flying from Montreal to Seattle round-trip?
American Airlines, at C$ 255, was found to be the cheapest airline from Montreal to Seattle.Alternate airlines to your destination round-trip include Delta and WestJet. American Airlines is 64% 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$ 277). Flying from Montreal to Seattle in January is currently the most expensive (average of C$ 503). 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 28 December 2025.
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 28 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 28 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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