$582 Cheap Flights from Wilmington (ILM) to Castries (SLU)

View $582 flight on Tue, Dec 9, 2025Opens in a new window

Popular airlines from Wilmington Intl. Airport (ILM) to George F. L. Charles Airport (SLU)

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Wilmington to Castries (ILM-SLU)

Prices were available within the past 7 days and start at $582 for one-way flights and $1,565 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Nov 11 - Fri, Nov 14
ILM
Wilmington
SLU
Castries
$1,565 Roundtrip, found 4 days ago
$1,565
Roundtrip
found 4 days ago
Select United flight, departing Tue, Nov 11 from Wilmington to Castries, returning Fri, Nov 14, priced at $1,565 found 4 days ago

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 $800
UVF
Hewanorra Intl.
Cheapest
Average driving time to city center53 min
Flights from $800
Flights from Wilmington (ILM) to Castries (SLU)
Origin airport
Wilmington Intl.
Destination airport
George F. L. Charles
Roundtrip price
$1,565
Distance
1753 mi

Wilmington to Castries Flights

The cheapest times to fly from Wilmington 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 Wilmington to Castries are during the month of November. You can find some of the cheapest flights from Wilmington to Castries with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Wilmington to Castries

Sunday is one of the best days to book for cheap flights from Wilmington 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 Wilmington 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 Wilmington to Castries in 2025. You can also book with separate airlines for your outbound and return journeys, from $582 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 Wilmington 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 Wilmington 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 Wilmington Intl. Airport (ILM) to George F. L. Charles Airport (SLU) cost?
Get a cheap one-way flight from $582 or cheap return flight from $1,565 from Wilmington Intl. Airport (ILM) to George F. L. Charles Airport (SLU) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Wilmington Intl. Airport (ILM) to George F. L. Charles Airport (SLU)?
Planning your trip for November can help you save, as it's the cheapest month for flights between ILM and SLU. You'll typically find the lowest fares during off-peak months.
How many flights per day from Wilmington Intl. Airport (ILM) to George F. L. Charles Airport (SLU)?
You'll have to catch a flight with a layover when traveling from Wilmington Intl. Airport (ILM) to George F. L. Charles Airport (SLU). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from ILM to SLU?
Generally you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can vary depending on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Wilmington Intl. Airport (ILM) to George F. L. Charles Airport (SLU)?
Select a flight from Wilmington Intl. Airport (ILM) to George F. L. Charles Airport (SLU) that takes off before 3 PM to reduce the likelihood of delays. Departures after this time have a 22% higher chance of being canceled, on average.**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 Wilmington Intl. Airport (ILM) to George F. L. Charles Airport (SLU) last-minute?
Last-minute bookings from ILM to SLU are generally more expensive. For the cheapest rates, start searching for flights early. That being said, if you're flexible with your travel plans, you may find a cheap fare just before your departure.
Is it cheaper to book an ILM to SLU flight and hotel package?
Compared with arranging hotels and flights separately, booking an ILM to SLU flight and hotel package with Expedia could result in significant savings. Better yet, having it all in one place will take the hassle out of travel planning. Simply secure your flights and choose from our extensive range of stays, then tailor your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Wilmington Intl. Airport (ILM) to George F. L. Charles Airport (SLU)?
If you reserved your ILM to SLU flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you'd like more information.

Explore a world of travel with Expedia

*Available to One Key members.