$812 Cheap Flights from Des Moines (DSM) to Castries (SLU)

View $812 flight on Tue, Sep 23, 2025Opens in a new window

Popular airlines from Des Moines International Airport (DSM) to George F. L. Charles Airport (SLU)

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Cheap Flights from Des Moines to Castries (DSM-SLU)

Prices were available within the past 7 days and start at $812 for one-way flights and $1,605 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Sep 23 - Wed, Oct 1
DSM
Des Moines
SLU
Castries
$1,605 Roundtrip, found 21 hours ago
$1,605
Roundtrip
found 21 hours ago
Select United flight, departing Tue, Sep 23 from Des Moines to Castries, returning Wed, Oct 1, priced at $1,605 found 21 hours ago
Flights from Des Moines (DSM) to Castries (SLU)
Origin airport
Des Moines Intl.
Destination airport
George F. L. Charles
Roundtrip price
$1,605
Distance
2725 mi

Des Moines to Castries Flights

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

 

The best time to book a flight from Des Moines to Castries

Sunday is one of the best days to book for cheap flights from Des Moines 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 Des Moines 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 Des Moines to Castries in 2025. You can also book with separate airlines for your outbound and return journeys, from $812 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 Des Moines 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 Des Moines 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 Des Moines Intl. Airport (DSM) to George F. L. Charles Airport (SLU) cost?
Secure a cheap one-way flight from $812 or cheap return flight from $1,605 from Des Moines Intl. Airport (DSM) 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 Des Moines Intl. Airport (DSM) to George F. L. Charles Airport (SLU)?
Flying in September is a great way to save, as it's the cheapest month for flights between DSM and SLU. You'll often find the lowest prices during off-peak months.
What is the cheapest airline that flies from Des Moines Intl. Airport (DSM) to George F. L. Charles Airport (SLU)?
Use the filter tool on Expedia to compare airlines and find the most affordable carrier that'll fly you from DSM to SLU. Then, sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Des Moines Intl. Airport (DSM) to George F. L. Charles Airport (SLU)?
There aren't any daily direct flights from Des Moines Intl. Airport (DSM) to George F. L. Charles Airport (SLU). But you can choose flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way in no time at all.
What day of the week has the most flights from DSM to SLU?
Generally you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* However, this can vary based on the season, carrier 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 Des Moines Intl. Airport (DSM) to George F. L. Charles Airport (SLU)?
To arrive at George F. L. Charles Airport (SLU) on schedule, pick a flight that leaves from Des Moines Intl. Airport (DSM) before 3 PM. The likelihood 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 Des Moines Intl. Airport (DSM) to George F. L. Charles Airport (SLU) last-minute?
Last-minute fares from DSM to SLU are generally more expensive. To lock in the best prices, start searching for flights as early as possible. That said, if you can play around with your travel dates, it's possible to find a cheap fare right before your trip.
Is it cheaper to book a DSM to SLU flight and hotel package?
You'll typically save money by securing a DSM to SLU flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. Once you've selected your preferred flights and accommodations, consider adding extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Des Moines Intl. Airport (DSM) to George F. L. Charles Airport (SLU)?
Typically, you can reschedule or cancel your DSM to SLU flight. However, there may be additional fees, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you need more details, go to our Customer Service portal.

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*Available to One Key members.