Cheap flights from Montreal to Seattle from C$ 273
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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
Cheapflights Tip: The best prices from Montreal to Seattle/Tacoma Intl are usually found in August or October, booked 30 days in advance, depart on a Friday or Tuesday and return on a Wednesday
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 3 July 2025.
Round-trip from | C$ 538 |
---|---|
One-way from | C$ 273 |
Popular in | December |
Cheapest in | August |
Average price | C$ 759 |
Good round-trip deal | C$ 617 or less |
Good one-way deal | C$ 380 or less |
Find flight deals from Montreal to Seattle
Cheapest flights from Montreal to SeattleExplore 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 3 July 2025.
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 3 July 2025.
Cheapflights Fare Finder
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 3 July 2025.
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
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Fri 25/7
7:00 a.m.-12:58 p.m.
1 stop8h 58m
Seattle/Tacoma Intl
Tue 29/7
2:05 p.m.-12:43 a.m.
1 stop7h 38m
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Wed 3/9
8:25 a.m.-2:16 p.m.
1 stop8h 51m
Seattle/Tacoma Intl
Wed 10/9
7:15 a.m.-3:28 p.m.
Nonstop5h 13m
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Thu 4/9
6:45 a.m.-4:58 p.m.
2 stops13h 13m
Seattle/Tacoma Intl
Tue 9/9
2:05 p.m.-12:41 a.m.
1 stop7h 36m
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Thu 4/9
11:23 a.m.-9:22 p.m.
2 stops12h 59m
Seattle/Tacoma Intl
Tue 9/9
7:10 a.m.-10:06 p.m.
2 stops11h 56m
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Tue 12/8
5:29 p.m.-9:19 a.m.
1 stop18h 50m
Seattle/Tacoma Intl
Fri 15/8
12:46 a.m.-10:59 p.m.
2 stops19h 13m
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Mon 15/9
1:10 p.m.-8:52 a.m.
2 stops22h 42m
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Wed 3/9
7:00 a.m.-12:59 p.m.
1 stop8h 59m
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Wed 3/9
4:45 p.m.-7:31 p.m.
Nonstop5h 46m
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Sun 28/9
9:45 a.m.-4:31 p.m.
1 stop9h 46m
MontrealSeattle
YUL - SEA
YULSEA
Montreal Pierre Elliott Trudeau Intl
Sat 27/9
9:45 a.m.-3:45 p.m.
1 stop9h 00m
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.
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 27 June 2025.
Booking 30 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, January is the cheapest month in which you can book a flight from Montreal to Seattle (average of C$ 262). Flying from Montreal to Seattle in December is currently the most expensive (average of C$ 353). 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 3 July 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 27% on your trip compared to booking a flight at noon.
Weekly flight availability from Montreal to Seattle
Explore weekly flight availability from Montreal to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 3 July 2025.
The most flights from YMQ to SEA are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).
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 3 July 2025.
Read through reviews of airlines operating flights from Montreal to Seattle, such as United Airlines,American Airlines, andWestJet. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
Food
Crew
Comfort
Entertainment
Overall
Reviews
Thomas,Apr 2025
TPE - SFO
Boarding
Food
Crew
Comfort
Entertainment
Overall
Reviews
Thomas,Apr 2025
TPE - SFO
Boarding
Food
Crew
Comfort
Entertainment
Overall
Reviews
Thomas,Apr 2025
TPE - SFO
Boarding
Food
Crew
Comfort
Entertainment
Overall
Reviews
Thomas,Apr 2025
TPE - SFO
Boarding
Food
Crew
Comfort
Entertainment
Overall
Reviews
Thomas,Apr 2025
TPE - SFO
Boarding
Food
Crew
Comfort
Entertainment
Overall
Reviews
Thomas,Apr 2025
TPE - SFO
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.
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Alternative routes for Montreal to Seattle
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Montreal to Seattle
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 3 July 2025.
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How does Cheapflights help users find flights from Montreal to Seattle?
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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?
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