C$389 Cheap Flights from Montreal to Seattle

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Flight deals from Montreal to Seattle

Looking for a cheap last-minute deal or the best round-trip flight from Montreal to Seattle? Find the lowest prices on one-way and round-trip tickets right here.

Seattle.C$389 per passenger.Departing Tue, Apr 1, returning Tue, Apr 15.Round-trip flight with Porter Airlines (Canada) Ltd and Spirit Airlines.Outbound indirect flight with Porter Airlines (Canada) Ltd, departing from Montreal Pierre Elliott Trudeau on Tue, Apr 1, arriving in Seattle / Tacoma International.Inbound indirect flight with Spirit Airlines, departing from Seattle / Tacoma International on Tue, Apr 15, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$389, select.

Seattle.C$435 per passenger.Departing Mon, Mar 24, returning Mon, Mar 31.Round-trip flight with Porter Airlines (Canada) Ltd and Frontier Airlines.Outbound indirect flight with Porter Airlines (Canada) Ltd, departing from Montreal Pierre Elliott Trudeau on Mon, Mar 24, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Mon, Mar 31, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$435, select.

Seattle.C$452 per passenger.Departing Tue, Mar 25, returning Tue, Apr 1.Round-trip flight with Porter Airlines (Canada) Ltd and Spirit Airlines.Outbound indirect flight with Porter Airlines (Canada) Ltd, departing from Montreal Pierre Elliott Trudeau on Tue, Mar 25, arriving in Seattle / Tacoma International.Inbound indirect flight with Spirit Airlines, departing from Seattle / Tacoma International on Tue, Apr 1, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$452, select.

Seattle.C$466 per passenger.Departing Thu, May 1, returning Sun, May 4.Round-trip flight with Porter Airlines (Canada) Ltd and Spirit Airlines.Outbound indirect flight with Porter Airlines (Canada) Ltd, departing from Montreal Pierre Elliott Trudeau on Thu, May 1, arriving in Seattle / Tacoma International.Inbound indirect flight with Spirit Airlines, departing from Seattle / Tacoma International on Sun, May 4, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$466, select.

Seattle.C$473 per passenger.Departing Tue, May 27, returning Tue, Jun 3.Round-trip flight with WestJet.Outbound indirect flight with WestJet, departing from Montreal Pierre Elliott Trudeau on Tue, May 27, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departing from Seattle / Tacoma International on Tue, Jun 3, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$473, select.

Seattle.C$475 per passenger.Departing Wed, Apr 30, returning Wed, May 7.Round-trip flight with WestJet.Outbound indirect flight with WestJet, departing from Montreal Pierre Elliott Trudeau on Wed, Apr 30, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departing from Seattle / Tacoma International on Wed, May 7, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$475, select.

Seattle.C$504 per passenger.Departing Tue, Jun 3, returning Tue, Jun 10.Round-trip flight with WestJet.Outbound indirect flight with WestJet, departing from Montreal Pierre Elliott Trudeau on Tue, Jun 3, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departing from Seattle / Tacoma International on Tue, Jun 10, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$504, select.

Seattle.C$527 per passenger.Departing Thu, Sep 4, returning Fri, Sep 12.Round-trip flight with Porter Airlines (Canada) Ltd and WestJet.Outbound indirect flight with Porter Airlines (Canada) Ltd, departing from Montreal Pierre Elliott Trudeau on Thu, Sep 4, arriving in Seattle / Tacoma International.Inbound indirect flight with WestJet, departing from Seattle / Tacoma International on Fri, Sep 12, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$527, select.

Find the cheapest month to fly from Montreal to Seattle

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Montreal to Seattle flights are currently cheapest in April.

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Direct flights from Montreal to Seattle

Alternative Montreal to Seattle routes

Looking for the cheapest, fastest or easiest route from Montreal to Seattle? You could fly into the following airports instead.

Montreal to Seattle: Flight information

The things to know before you go.

Cheapest flight found	C$389
Cheapest month to fly	April
Average flight time	5 hrs, 52 mins
Most popular airline	Air Canada
Average flights per week	16

Finding cheap flights from Montreal to Seattle: Frequently asked questions

How many airports are there in Seattle?

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.

How much are round-trip flights from Montreal to Seattle?

The best price we found for a round-trip flight from Montreal to Seattle is C$389. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Montreal to Seattle?

5 hours and 52 minutes is the average flight time from Montreal to Seattle.

Which airlines fly direct from Montreal to Seattle?

Air Canada and United fly direct from Montreal to Seattle.

How many flights are there a week from Montreal to Seattle?

There are 16 flights per week flying from Montreal to Seattle, as of March 2025.

When is the cheapest time to fly from Montreal to Seattle?

The cheapest month to fly from Montreal to Seattle is usually March 2025.

What's the cheapest airport to fly to in Seattle?

If you're flying from Montreal, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the center of Seattle. We've found flights to this airport from C$389.

Which upcoming date is cheapest to fly from Montreal to Seattle on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Montreal to Seattle on Tuesday, April 1, 2025.

Can I get a direct flight from Montreal to Seattle?

Yes – the average flight time is 5 hours and 52 minutes.

How can I get the best flight deal from Montreal to Seattle?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Seattle but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Seattle?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Seattle is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in Seattle?

In March, the average temperature is usually around 6°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.

Which is the cheapest airline to fly with from Montreal to Seattle?

The cheapest airline that flies to Seattle is Porter Airlines (Canada) Ltd, and the cheapest airline that flies to Seattle Boeing Fld Airport is Air Canada.

How to find cheap flights to Seattle from Montreal

Looking for cheap tickets from Montreal to Seattle? Here are a few tips on how to secure the best flight price and make your journey as smooth as possible.

Simply hit "search." From Delta Air Lines to international carriers like Emirates, we compare all major airlines along with the most popular online travel agents to find the cheapest plane tickets from Montreal to Seattle. And with us, there are no hidden fees – what you see is what you pay.
Compare flight deals to Seattle from Montreal from over 1,000 providers. Then choose the cheapest plane tickets or fastest journeys.
Flex your dates to find the best Montreal–Seattle ticket prices. If you're flexible when it comes to your travel dates, use Skyscanner's "Whole month" tool to find the cheapest month, and even day to fly to Seattle from Montreal.
Set up a Price Alert. You can easily track the fare of your cheap Montreal–Seattle flights by creating an alert. Whenever prices go down or up, you'll get an email or push notification to help make sure you get the best possible flight deal.
Fly without stops. Only interested in direct flights between Montreal and Seattle? Make sure to tick "Direct flights only" when performing a search. If there are direct flights available on the route, these will appear in the results.
Find the cheapest Business Class flights from Montreal and Seattle. We scour the Internet for the best Business, Premium Economy and First Class flight fares to Seattle, too. Check the difference in price as you search – you might just stumble on a last-minute low fare. Note that not all cabin classes are available for every destination or airline.
Include nearby airports in your search. Widen your search for Montreal to Seattle flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save the next time you travel.

Combine your flight to Seattle from Montreal with hotels and car rental

Once you've secured your cheap flight ticket from Montreal to Seattle, discover the best prices and exclusive rates for hotels in Seattle or nearby. You can also compare hundreds of car rental companies at once so you get the best car rental price for your trip.