Cheap flights from Montreal to Seattle from C$ 237
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 12/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Early arrival? Instantly customize your resultsTrusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Montreal to Seattle
Cheap round-trip flights
Cheap one-way flights
Cheap last-minute flights
Cheap direct flights
WestJet flights from Montreal to Seattle
Our best WestJet deals on Montreal to Seattle flight tickets
Air Canada flights from Montreal to Seattle
Our best Air Canada deals on Montreal to Seattle flight tickets
See travel insights to Seattle from
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?
If you aren’t able to travel to Seattle during the month of August, then flying in October is also cheap. Prices for this month can be found on momondo for an average of C$ 667.
What is the cheapest day to depart on your flight to Seattle?
Our data shows that Friday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 661. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around C$ 846. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.
What is the cheapest time of day to depart on your flight to Seattle?
Our most recent data shows that the best time of day to fly to Seattle is in the evening. Flights from Montreal to Seattle during this time can be as low as C$ 554. Flights at noon are often more expensive with an average ticket price of C$ 748.
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 C$ 689 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 C$ 492 on momondo.
What cabin class options are available on Montreal to Seattle/Tacoma Intl flights?
There are 2 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 29% 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 4% more expensive when compared to flights at the same time last year.
What is the cheapest airline that flies from Montreal to Seattle/Tacoma Intl?
WestJet, Air Canada, and United Airlines are the most popular carriers operating from Montreal to Seattle/Tacoma Intl
Which airlines fly to Seattle?
Air Canada, WestJet and United Airlines are the top three most popular airlines that fly to Seattle from Montreal according to our data. Air Canada is the first choice among our users, with 66% of people opting to fly with this airline when travelling to Seattle. Keep in mind that there are 5 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.
How many flights depart from Montreal to Seattle on average per day?
2 flights are operational daily from Montreal to Seattle as of June 2025. The most popular departure time for this route is 5:00p.m., with 100% of flights per day taking off in the afternoon.
How many flights depart from Montreal to Seattle on average per week?
14 flights are operational weekly from Montreal to Seattle as of June 2025. The most popular departure day for this route is Mon, with 14% of flights per week taking off 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?
The straight-line distance from Montreal to Seattle/Tacoma Intl is 3672.5 km. In terms of flight time, this usually takes a little over 5h 46m.
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?
There are 5 operators available for flights from Montreal to Seattle/Tacoma Intl Airport as of June 2025.
How old do you have to be to fly from Montreal to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for 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?
momondo data reveals that the most frequently booked airline on the route from Montreal to Seattle is Air Canada, representing 67% of all bookings. The subsequent popular airlines are WestJet at 22% and United Airlines at 11%.
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 C$ 357 | Free Cancellation | Rating 7.2 2,868 reviews | |||
| PriceFrom C$ 492 | Free Cancellation | Rating 8.0 7,950 reviews | |||
| PriceFrom C$ 503 | Free Cancellation | Rating 7.1 9,531 reviews | |||
| PriceFrom C$ 524 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom C$ 529 | Free Cancellation | Rating 7.4 8,790 reviews |
United Airlines Flights From Montreal to Seattle
United Airlines operates around 7 flights from Montreal to Seattle every week. The average price of these flights found in the last 72 hours has been C$ 528, but momondo users have found United Airlines deals from Montreal to Seattle from as low as C$ 387 round-trip. United Airlines has been scored 7.4/10 in 8,790 reviews.
Air Canada Flights From Montreal to Seattle
Air Canada is also a popular choice for this route. Air Canada flight deals for Montreal to Seattle start from as low as C$ 368 round-trip, depending on your selected dates, with average Air Canada deals seen on momondo around C$ 518. Air Canada operates 7 flights to Seattle from Montreal in an average week. Users have rated it 7.1/10 across 9,531 reviews.
Travelling 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?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Montreal to Seattle . Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Montreal to Seattle with flexible booking policies on momondo?
Flights from Montreal to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Montreal to Seattle?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Montreal.
I’m not ready to book a flight from Montreal to Seattle right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Montreal to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.