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Cheap flights from Washington, D.C. Dulles Intl Airport to Castries from $415

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. Dulles Intl Airport to Castries departing on 4/20. 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. Dulles Intl Airport to Castries

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:00 pm - 7:00 pm
IAD
-
SLU
27h 00m
2 stops
Multiple Airlines Logo
12:35 pm - 3:25 pm
SLU
-
IAD
26h 50m
2 stops
$806Multiple Airlines
Wed, Sep 9 - Thu, Sep 17
Multiple Airlines Logo
4:20 pm - 7:00 pm
IAD
-
SLU
26h 40m
2 stops
Multiple Airlines Logo
3:45 pm - 3:24 pm
SLU
-
IAD
47h 39m
2 stops
$836Multiple Airlines
Wed, Jul 1 - Mon, Jul 6
Multiple Airlines Logo
4:20 pm - 7:00 pm
IAD
-
SLU
26h 40m
2 stops
Multiple Airlines Logo
12:35 pm - 3:24 pm
SLU
-
IAD
26h 49m
2 stops
$866Multiple Airlines
Sun, Jul 12 - Sun, Jul 19
Multiple Airlines Logo
4:20 pm - 7:00 pm
IAD
-
SLU
26h 40m
2 stops
Multiple Airlines Logo
3:45 pm - 3:24 pm
SLU
-
IAD
47h 39m
2 stops
$886Multiple Airlines
Sat, Jul 11 - Sat, Jul 18
Multiple Airlines Logo
9:55 am - 7:00 pm
IAD
-
SLU
33h 05m
2 stops
Multiple Airlines Logo
3:45 pm - 3:04 pm
SLU
-
IAD
47h 19m
2 stops
$922Multiple Airlines
Wed, Jun 17 - Sun, Jun 21
Multiple Airlines Logo
9:55 am - 7:00 pm
IAD
-
SLU
33h 05m
2 stops
Multiple Airlines Logo
12:35 pm - 3:24 pm
SLU
-
IAD
26h 49m
2 stops
$941Multiple Airlines
Wed, Jul 22 - Sun, Jul 26
Multiple Airlines Logo
5:15 pm - 7:00 pm
IAD
-
SLU
25h 45m
2 stops
Multiple Airlines Logo
12:35 pm - 3:24 pm
SLU
-
IAD
26h 49m
2 stops
$973Multiple Airlines
Thu, Jul 16 - Wed, Jul 22
Multiple Airlines Logo
5:15 pm - 7:00 pm
IAD
-
SLU
25h 45m
2 stops
Multiple Airlines Logo
12:35 pm - 3:01 pm
SLU
-
IAD
26h 26m
3 stops
$1,009Multiple Airlines
Thu, Jul 16 - Tue, Jul 21
Multiple Airlines Logo
5:15 pm - 7:00 pm
IAD
-
SLU
25h 45m
2 stops
Multiple Airlines Logo
9:10 am - 7:01 pm
SLU
-
IAD
33h 51m
3 stops
$1,038Multiple Airlines
Sun, Jul 12 - Sun, Jul 19
Multiple Airlines Logo
4:00 pm - 7:00 pm
IAD
-
SLU
27h 00m
2 stops
Multiple Airlines Logo
12:35 pm - 9:26 pm
SLU
-
IAD
32h 51m
2 stops
$1,057Multiple Airlines
Wed, Jun 24 - Sun, Jun 28

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl 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 April 14, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Castries that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Wed 9/9

4:00 pm-7:00 pm

2 stops27h 00m

Castries George F. L. Charle

Thu 9/17

12:35 pm-3:25 pm

2 stops26h 50m

$806

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Wed 7/1

4:20 pm-7:00 pm

2 stops26h 40m

Castries George F. L. Charle

Mon 7/6

3:45 pm-3:24 pm

2 stops47h 39m

$836

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Sun 7/12

4:20 pm-7:00 pm

2 stops26h 40m

Castries George F. L. Charle

Sun 7/19

12:35 pm-3:24 pm

2 stops26h 49m

$866

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Sat 7/11

4:20 pm-7:00 pm

2 stops26h 40m

Castries George F. L. Charle

Sat 7/18

3:45 pm-3:24 pm

2 stops47h 39m

$886

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Wed 6/17

9:55 am-7:00 pm

2 stops33h 05m

Castries George F. L. Charle

Sun 6/21

3:45 pm-3:04 pm

2 stops47h 19m

$922

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Wed 7/22

9:55 am-7:00 pm

2 stops33h 05m

Castries George F. L. Charle

Sun 7/26

12:35 pm-3:24 pm

2 stops26h 49m

$941

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Thu 7/16

5:15 pm-7:00 pm

2 stops25h 45m

Castries George F. L. Charle

Wed 7/22

12:35 pm-3:24 pm

2 stops26h 49m

$973
Quickest round-trip

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Thu 7/16

5:15 pm-7:00 pm

2 stops25h 45m

Castries George F. L. Charle

Tue 7/21

12:35 pm-3:01 pm

3 stops26h 26m

$1,009

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Sun 7/12

5:15 pm-7:00 pm

2 stops25h 45m

Castries George F. L. Charle

Sun 7/19

9:10 am-7:01 pm

3 stops33h 51m

$1,038

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Wed 6/24

4:00 pm-7:00 pm

2 stops27h 00m

Castries George F. L. Charle

Sun 6/28

12:35 pm-9:26 pm

2 stops32h 51m

$1,057

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
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When to book flights from Washington, D.C. Dulles Intl Airport to Castries

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl 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. Dulles Intl Airport to Castries (IAD to SLU) flight deals and tips

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

Fastest flight time

20h 11m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Castries takes 20h 11m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Castries. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Castries.
Search flight deals

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to Castries

  • How far is Washington, D.C. Dulles Intl to Castries George F. L. Charle by plane?

    There are 1992.4 mi between Washington, D.C. Dulles Intl and Castries George F. L. Charle. Typically, this will take 20h 11m by plane in normal conditions.

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

    Prices for flights from Washington, D.C. Dulles Intl Airport to Castries George F. L. Charle Airport are updated daily.

  • How old do you have to be to fly from Washington, D.C. Dulles Intl 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. Dulles Intl 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.

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to Castries

  • How do I get Price Alerts for flights from Washington, D.C. Dulles Intl Airport to Castries?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Washington, D.C. Dulles Intl Airport from Castries. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Washington, D.C. Dulles Intl Airport to Castries with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

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?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Castries from Washington, D.C..

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

Yes. momondo allows you to filter the results for Washington, D.C. to Castries flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Washington, D.C. and Castries by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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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