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Cheap flights from Washington, D.C. Reagan-National Airport to Castries from $729

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Reagan-National Airport to Castries departing on 11/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Washington, D.C. Reagan-National Airport to Castries

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:59 am - 7:00 pmDCA-SLU
35h 01m2 stops
Multiple Airlines Logo
12:35 pm - 12:19 pmSLU-DCA
24h 44m3 stops
$822Multiple Airlines
Find Deal
Thu, Nov 6 - Mon, Nov 10
Multiple Airlines Logo
6:00 am - 7:00 pmDCA-SLU
12h 00m2 stops
Multiple Airlines Logo
10:25 am - 10:26 amSLU-DCA
25h 01m3 stops
$891Multiple Airlines
Find Deal
Sat, Dec 6 - Wed, Dec 10
Multiple Airlines Logo
6:00 am - 7:00 pmDCA-SLU
12h 00m2 stops
Multiple Airlines Logo
12:35 pm - 10:26 amSLU-DCA
22h 51m2 stops
$899Multiple Airlines
Find Deal
Sat, Dec 6 - Wed, Dec 10
Multiple Airlines Logo
6:50 pm - 7:00 pmDCA-SLU
23h 10m2 stops
Multiple Airlines Logo
1:55 pm - 8:55 amSLU-DCA
20h 00m2 stops
$915Multiple Airlines
Find Deal
Sat, Nov 22 - Fri, Nov 28
Multiple Airlines Logo
9:40 am - 7:00 pmDCA-SLU
32h 20m2 stops
Multiple Airlines Logo
7:30 am - 7:45 pmSLU-DCA
13h 15m2 stops
$942Multiple Airlines
Find Deal
Thu, Jan 15 - Tue, Jan 20
Multiple Airlines Logo
6:59 am - 1:10 pmDCA-SLU
29h 11m3 stops
Multiple Airlines Logo
12:35 pm - 10:26 amSLU-DCA
22h 51m3 stops
$947Multiple Airlines
Find Deal
Thu, Nov 6 - Mon, Nov 10
Multiple Airlines Logo
8:40 pm - 7:00 pmDCA-SLU
21h 20m2 stops
Multiple Airlines Logo
12:35 pm - 10:26 amSLU-DCA
22h 51m3 stops
$959Multiple Airlines
Find Deal
Thu, Jan 15 - Tue, Jan 20
Multiple Airlines Logo
6:59 am - 7:00 pmDCA-SLU
35h 01m2 stops
Multiple Airlines Logo
1:15 pm - 8:55 amSLU-DCA
20h 40m2 stops
$983Multiple Airlines
Find Deal
Tue, Nov 18 - Sat, Nov 22
Multiple Airlines Logo
12:55 pm - 7:00 pmDCA-SLU
29h 05m3 stops
Multiple Airlines Logo
6:20 pm - 7:45 pmSLU-DCA
26h 25m3 stops
$991Multiple Airlines
Find Deal
Tue, Nov 18 - Sat, Nov 22
Multiple Airlines Logo
6:00 am - 7:00 pmDCA-SLU
12h 00m2 stops
Multiple Airlines Logo
6:20 pm - 7:00 pmSLU-DCA
25h 40m3 stops
$1,005Multiple Airlines
Find Deal
Sun, Nov 23 - Thu, Nov 27

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Reagan-National Airport to Castries that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 22, 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Castries that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Thu 11/6

6:59 am-7:00 pm

2 stops35h 01m

Castries George F. L. Charle

Mon 11/10

12:35 pm-12:19 pm

3 stops24h 44m

$822

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Sat 12/6

6:00 am-7:00 pm

2 stops12h 00m

Castries George F. L. Charle

Wed 12/10

10:25 am-10:26 am

3 stops25h 01m

$891

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Sat 12/6

6:00 am-7:00 pm

2 stops12h 00m

Castries George F. L. Charle

Wed 12/10

12:35 pm-10:26 am

2 stops22h 51m

$899

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Sat 11/22

6:50 pm-7:00 pm

2 stops23h 10m

Castries George F. L. Charle

Fri 11/28

1:55 pm-8:55 am

2 stops20h 00m

$915

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Thu 1/15

9:40 am-7:00 pm

2 stops32h 20m

Castries George F. L. Charle

Tue 1/20

7:30 am-7:45 pm

2 stops13h 15m

$942

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Thu 11/6

6:59 am-1:10 pm

3 stops29h 11m

Castries George F. L. Charle

Mon 11/10

12:35 pm-10:26 am

3 stops22h 51m

$947

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Thu 1/15

8:40 pm-7:00 pm

2 stops21h 20m

Castries George F. L. Charle

Tue 1/20

12:35 pm-10:26 am

3 stops22h 51m

$959

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Tue 11/18

6:59 am-7:00 pm

2 stops35h 01m

Castries George F. L. Charle

Sat 11/22

1:15 pm-8:55 am

2 stops20h 40m

$983

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Tue 11/18

12:55 pm-7:00 pm

3 stops29h 05m

Castries George F. L. Charle

Sat 11/22

6:20 pm-7:45 pm

3 stops26h 25m

$991

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Sun 11/23

6:00 am-7:00 pm

2 stops12h 00m

Castries George F. L. Charle

Thu 11/27

6:20 pm-7:00 pm

3 stops25h 40m

$1,005

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to Castries

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Castries?

The cheapest day to depart from Washington, D.C. Reagan-National Airport to Castries is on a Monday when prices can be found for as low as $671. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $849. These prices are subject to change though, so be sure to set up a Price Alert for flights to Castries.

What is the cheapest time of day to depart on your flight to Castries?

According to our data, the cheapest time of day to fly to Castries is in the evening. momondo users have found flights departing from Washington, D.C. Reagan-National Airport to Castries in the evening for as low as $715. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Castries are more costly in the morning, with an average ticket price of $764. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

When to book flights from Washington, D.C. Reagan-National Airport to Castries

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Reagan-National Airport to Castries according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Reagan-National Airport to Castries (DCA to SLU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Reagan-National Airport to Castries

Direct flights

None
There are no direct flights from Washington, D.C. Reagan-National Airport to Castries. There are no popular flight routes from Washington, D.C. Reagan-National Airport to Castries.
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  • How far is Washington, D.C. Reagan-National to Castries George F. L. Charle by plane?

    The distance between Washington, D.C. Reagan-National and Castries George F. L. Charle is about 1974.4 mi. Flights usually cover this in 12h 00m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to Castries George F. L. Charle Airport?

    Prices for flights from Washington, D.C. Reagan-National Airport to Castries George F. L. Charle Airport were last updated today.

  • How old do you have to be to fly from Washington, D.C. Reagan-National Airport to Castries George F. L. Charle Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Reagan-National Airport to Castries George F. L. Charle Airport.

  • What documentation or ID do you need to fly to Castries George F. L. Charle Airport?

    The required travel and health documents for your Castries George F. L. Charle Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Castries George F. L. Charle Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near Castries?

Book flights to Castries if you plan to visit one of these locations
Gros Islet
Rodney Bay
Marigot Bay

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Castries?

It is quick and easy to find Washington, D.C. to Castries flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Castries that suits you.

Can I find flights from Washington, D.C. to Castries with flexible booking policies on momondo?

Yes. All flights to Castries from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington, D.C. to Castries?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to Castries.

I’m not ready to book a flight from Washington, D.C. to Castries right now. Can momondo alert me if prices change?

Price alerts on flights to Castries from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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