Cheap flights from Montreal to Seattle from $173
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Montreal to Seattle departing on 9/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Air Canada flights from Montreal to Seattle
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WestJet flights from Montreal to Seattle
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How to get the cheapest flight ticket from Montreal to Seattle
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Seattle?
In general, August is the cheapest month to fly from Montreal to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $484. If you don’t want to visit Seattle in August, then you should wait until October to fly from Montreal, when ticket prices are also cheap, with an average price of $488.
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from Montreal is on a Monday. momondo users have found tickets for Monday departures for as low as $294. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Montreal because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $694.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from Montreal in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $372 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the morning, with an average ticket price of $503. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Montreal to Seattle/Tacoma Intl flight route?
Fly from Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl for the best Montreal - Seattle/Tacoma Intl flight prices
How far in advance should I book a flight to Seattle?
You are more likely to see cheaper flights to Seattle from Montreal when booking 17 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $504 when searching 17 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Montreal for as low as $360 on momondo.
What cabin class options are available on Montreal to Seattle/Tacoma Intl flights?
There are 3 cabin classes available to choose from on Montreal to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on Montreal to Seattle flights?
You could potentially save up to 8% on your flight if you consider stops on a Montreal to Seattle flight.
How have Montreal to Seattle flight prices changed over time?
As of June 2025, prices for Montreal to Seattle flights are approximately 3% more expensive when compared to flights at the same time last year.
How many flights depart from Montreal to Seattle on average per day?
As of June 2025, 2 flights take off from Montreal and land in Seattle each day. The most common flight departure time for this route is 5:00PM, with 100% of daily flights taking off in the afternoon.
How many flights depart from Montreal to Seattle on average per week?
The number of flights available between Montreal and Seattle is 14 per week as of June 2025. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.
When to book flights from Montreal to Seattle
Cheap Montreal to Seattle (YMQ to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Montreal to Seattle
How far is Montreal to Seattle/Tacoma Intl by plane?
Montreal and Seattle/Tacoma Intl are 2282.0 mi apart from one another. Typically, this will take 5h 46m by plane in normal conditions.
When did momondo last update prices for flights from Montreal to Seattle/Tacoma Intl Airport?
Prices for flights from Montreal to Seattle/Tacoma Intl Airport are updated daily.
How many operators does momondo search for flights from Montreal to Seattle/Tacoma Intl Airport?
As of June 2025, there are 2 operators available to choose from for flights from Montreal to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Montreal to Seattle/Tacoma Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Montreal to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Montreal to Seattle?
Based on momondo bookings for flights between Montreal and Seattle, the leading plane model is Airbus A220-300, making up 97.79% of the total bookings. Other popular models include Boeing 737 MAX 8 with 0.88%, Boeing 737 MAX 9 with 0.88%, and Airbus A340-300 with 0.44%.
What is the most popular airline from Montreal to Seattle?
Based on momondo bookings for flights between Montreal and Seattle, the leading airline is Air Canada, making up 77% of the total bookings. Other popular airlines include WestJet with 23%.
Best airlines flying from Montreal to Seattle
Compare and see reviews for airlines that fly from Montreal to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $270 | Free Cancellation | Rating 7.2 2,868 reviews | |||
| PriceFrom $358 | Free Cancellation | Rating 7.1 9,537 reviews |
Air Canada Flights From Montreal to Seattle
Air Canada flight deals from Montreal to Seattle start from $358 round-trip. Over the 7 Air Canada flights for this route in a normal week, average airfare is usually $514 round-trip - but some users have found much cheaper deals with momondo.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Montreal to Seattle?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from Montreal.
Can I find flights from Montreal to Seattle with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Seattle from Montreal with this policy.
How can momondo help me find flights from Montreal to Seattle?
Once all potential Montreal to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Montreal to Seattle right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Montreal to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.