$429 Cheap Flights from Harrisburg (MDT) to Castries (SLU)

View $429 flight on Wed, Apr 1, 2026Opens in a new window

Popular airlines from Harrisburg Intl. Airport (MDT) 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 Harrisburg to Castries (MDT-SLU)

Prices were available within the past 7 days and start at $429 for one-way flights and $1,297 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Jan 4 - Sat, Jan 10
MDT
Harrisburg
SLU
Castries
$1,297 Roundtrip, found 9 hours ago
$1,297
Roundtrip
found 9 hours ago
Select United flight, departing Sun, Jan 4 from Harrisburg to Castries, returning Sat, Jan 10, priced at $1,297 found 9 hours 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 $811
UVF
Hewanorra Intl.
Cheapest
Average driving time to city center53 min
Flights from $811

Frequently asked questions

How much does a flight from Harrisburg Intl. Airport (MDT) to George F. L. Charles Airport (SLU) cost?
Get a cheap one-way flight from $429 or cheap return flight from $1,297 from Harrisburg Intl. Airport (MDT) 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 deals on this route.
What is the cheapest month to fly from Harrisburg Intl. Airport (MDT) to George F. L. Charles Airport (SLU)?
January is the least expensive month to fly from MDT to SLU. Traveling outside of peak seasons is often the key to finding a great deal.
What is the cheapest airline that flies from Harrisburg Intl. Airport (MDT) to George F. L. Charles Airport (SLU)?
To find the cheapest airline flying from MDT to SLU, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Harrisburg Intl. Airport (MDT) to George F. L. Charles Airport (SLU)?
You'll need to catch a flight with a layover if you're traveling from Harrisburg Intl. Airport (MDT) to George F. L. Charles Airport (SLU). There are no daily direct flights 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 MDT to SLU?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the time of year, airline 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 Harrisburg Intl. Airport (MDT) to George F. L. Charles Airport (SLU)?
To arrive at George F. L. Charles Airport (SLU) on schedule, choose a flight that leaves from Harrisburg Intl. Airport (MDT) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Harrisburg Intl. Airport (MDT) to George F. L. Charles Airport (SLU) last-minute?
Waiting until just before your trip to book your flight from MDT to SLU often results in higher prices. While you might find some last-minute offers, they're not always guaranteed. Be flexible with your travel plans for the best chance of landing a bargain.
Is it cheaper to book a MDT to SLU flight and hotel package?
Booking a MDT to SLU flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Choose from our impressive range of accommodations and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Harrisburg Intl. Airport (MDT) to George F. L. Charles Airport (SLU)?
If you reserved your MDT to SLU flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Harrisburg Intl.
Destination airport
George F. L. Charles
Roundtrip price
$1,296
Distance
2044 mi

Book with confidence

Harrisburg to Castries Flights

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

 

The best time to book a flight from Harrisburg to Castries

Sunday is one of the best days to book for cheap flights from Harrisburg 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 Harrisburg 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 Harrisburg to Castries in 2026. You can also book with separate airlines for your outbound and return journeys, from $429 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 Harrisburg 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 Harrisburg 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.

 

Harrisburg to Castries Flights

Explore a world of travel with Expedia

*Available to One Key members.