$1,610 Cheap Flights from Montreal (YUL) to Castries (SLU)

View $1,610 flight on Tue, May 19, 2026Opens in a new window

Popular airlines from Montreal–Trudeau Intl. Airport (YUL) to George F. L. Charles Airport (SLU)

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Cheap Flights from Montreal to Castries (YUL-SLU)

Prices were available within the past 7 days and start at $1,610 for one-way flights and $684 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

WestJet
Wed, Oct 1 - Wed, Oct 22
YUL
Montreal
SLU
Castries
$684 Roundtrip, found 4 hours ago
$684
Roundtrip
found 4 hours ago
Select WestJet flight, departing Wed, Oct 1 from Montreal to Castries, returning Wed, Oct 22, priced at $684 found 4 hours ago

Find the cheapest month to fly from Montreal (YUL) to Castries (SLU)

May is typically the cheapest month to fly

From $316 - $902 per traveler.

Graph displaying average flight prices per month

Alternative airports near Castries

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Hewanorra Intl. UVF. Cheapest option available. Average driving time to city center is 53 minutes. Flights from $417
UVF
Hewanorra Intl.
Cheapest
Average driving time to city center53 min
Flights from $417
Flights from Montreal (YUL) to Castries (SLU)
Origin airport
Pierre Elliott Trudeau Intl.
Destination airport
George F. L. Charles
Roundtrip price
$683
Distance
2296 mi

Montreal to Castries Flights

The cheapest times to fly from Montreal to Castries

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Montreal to Castries are during the month of October. You can find some of the cheapest flights from Montreal to Castries with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Montreal to Castries

Sunday is one of the best days to book for cheap flights from Montreal to Castries: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Montreal to Castries

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Montreal to Castries in 2025. You can also book with separate airlines for your outbound and return journeys, from $1,610 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Montreal to Castries flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Montreal to Castries airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Pierre Elliott Trudeau Intl. Airport (YUL) to George F. L. Charles Airport (SLU) cost?
Snag a cheap one-way flight from $1,610 or cheap return flight from $684 from Pierre Elliott Trudeau Intl. Airport (YUL) to George F. L. Charles Airport (SLU) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Pierre Elliott Trudeau Intl. Airport (YUL) to George F. L. Charles Airport (SLU)?
Planning your getaway for October is a good way to save, as it's the cheapest month for flights between YUL and SLU. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Pierre Elliott Trudeau Intl. Airport (YUL) to George F. L. Charles Airport (SLU)?
To find the cheapest airline that'll fly you from YUL to SLU, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Pierre Elliott Trudeau Intl. Airport (YUL) to George F. L. Charles Airport (SLU)?
Direct flights from Pierre Elliott Trudeau Intl. Airport (YUL) to George F. L. Charles Airport (SLU) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from YUL to SLU?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary based on a range of factors, including the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Pierre Elliott Trudeau Intl. Airport (YUL) to George F. L. Charles Airport (SLU)?
To land at George F. L. Charles Airport (SLU) on time, pick a flight that takes off from Pierre Elliott Trudeau Intl. Airport (YUL) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Pierre Elliott Trudeau Intl. Airport (YUL) to George F. L. Charles Airport (SLU) last-minute?
Booking your ticket from YUL to SLU shortly before your trip is generally more expensive. But if you're flexible with your itinerary, you could bag a cheap last-minute fare.
Is it cheaper to book a YUL to SLU flight and hotel package?
You'll typically save money by booking a YUL to SLU flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. After selecting your preferred accommodations and flights, consider adding extras like activities, car rentals and tours.
Can I cancel or change the date of my flight from Pierre Elliott Trudeau Intl. Airport (YUL) to George F. L. Charles Airport (SLU)?
If you booked your YUL to SLU flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more details.

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*Available to One Key members.