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Cheap flights from Washington, D.C. Dulles Intl Airport to Castries from $373

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 11/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Castries

Cheap round-trip flights

Logo
10:20 am - 7:00 pmIAD-SLU
32h 40m2 stops
Logo
12:10 pm - 8:29 pmSLU-IAD
32h 19m2 stops
$959
Find Deal
Wed, Oct 22 - Sun, Oct 26
Logo
4:25 pm - 3:50 pmIAD-SLU
22h 25m2 stops
Logo
3:20 pm - 8:26 pmSLU-IAD
30h 06m3 stops
$984
Find Deal
Sun, Nov 16 - Thu, Nov 20
Logo
9:00 am - 7:00 pmIAD-SLU
33h 00m2 stops
Logo
12:35 pm - 3:51 pmSLU-IAD
28h 16m2 stops
$985
Find Deal
Thu, Dec 4 - Mon, Dec 8
Logo
4:15 pm - 1:10 pmIAD-SLU
43h 55m3 stops
Logo
12:35 pm - 8:54 pmSLU-IAD
33h 19m3 stops
$988
Find Deal
Tue, Nov 4 - Mon, Nov 10
Logo
4:25 pm - 3:50 pmIAD-SLU
22h 25m2 stops
Logo
6:20 pm - 8:26 pmSLU-IAD
27h 06m2 stops
$989
Find Deal
Sun, Nov 16 - Thu, Nov 20
Logo
4:25 pm - 9:30 amIAD-SLU
16h 05m2 stops
Logo
12:35 pm - 8:54 pmSLU-IAD
33h 19m3 stops
$993
Find Deal
Tue, Nov 4 - Mon, Nov 10
Logo
4:25 pm - 7:00 pmIAD-SLU
25h 35m2 stops
Logo
6:20 pm - 8:54 pmSLU-IAD
27h 34m3 stops
$1,021
Find Deal
Wed, Nov 12 - Thu, Nov 20
Logo
4:25 pm - 7:00 pmIAD-SLU
25h 35m3 stops
Logo
6:20 pm - 8:54 pmSLU-IAD
27h 34m3 stops
$1,043
Find Deal
Sat, Nov 15 - Thu, Nov 20
Logo
4:25 pm - 12:05 pmIAD-SLU
18h 40m3 stops
Logo
3:20 pm - 8:26 pmSLU-IAD
30h 06m3 stops
$1,059
Find Deal
Sun, Nov 16 - Thu, Nov 20
Logo
9:45 am - 1:10 pmIAD-SLU
26h 25m3 stops
Logo
6:20 pm - 8:54 pmSLU-IAD
27h 34m3 stops
$1,089
Find Deal
Wed, Nov 12 - Thu, Nov 20

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 September 11, 2025.
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

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Wed 10/22

10:20 am-7:00 pm

2 stops32h 40m

Castries George F. L. Charle

Sun 10/26

12:10 pm-8:29 pm

2 stops32h 19m

$959

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Sun 11/16

4:25 pm-3:50 pm

2 stops22h 25m

Castries George F. L. Charle

Thu 11/20

3:20 pm-8:26 pm

3 stops30h 06m

$984

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Thu 12/4

9:00 am-7:00 pm

2 stops33h 00m

Castries George F. L. Charle

Mon 12/8

12:35 pm-3:51 pm

2 stops28h 16m

$985

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Tue 11/4

4:15 pm-1:10 pm

3 stops43h 55m

Castries George F. L. Charle

Mon 11/10

12:35 pm-8:54 pm

3 stops33h 19m

$988

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Sun 11/16

4:25 pm-3:50 pm

2 stops22h 25m

Castries George F. L. Charle

Thu 11/20

6:20 pm-8:26 pm

2 stops27h 06m

$989

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Tue 11/4

4:25 pm-9:30 am

2 stops16h 05m

Castries George F. L. Charle

Mon 11/10

12:35 pm-8:54 pm

3 stops33h 19m

$993

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Wed 11/12

4:25 pm-7:00 pm

2 stops25h 35m

Castries George F. L. Charle

Thu 11/20

6:20 pm-8:54 pm

3 stops27h 34m

$1,021

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Sat 11/15

4:25 pm-7:00 pm

3 stops25h 35m

Castries George F. L. Charle

Thu 11/20

6:20 pm-8:54 pm

3 stops27h 34m

$1,043

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Sun 11/16

4:25 pm-12:05 pm

3 stops18h 40m

Castries George F. L. Charle

Thu 11/20

3:20 pm-8:26 pm

3 stops30h 06m

$1,059

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Wed 11/12

9:45 am-1:10 pm

3 stops26h 25m

Castries George F. L. Charle

Thu 11/20

6:20 pm-8:54 pm

3 stops27h 34m

$1,089

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Washington, D.C. Dulles Intl 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. Dulles Intl 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. Dulles Intl 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. 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

Direct flights

None
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.
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  • 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 16h 05m 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 many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Castries George F. L. Charle Airport?

  • 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.

  • What is the most popular airline from Washington, D.C. Dulles Intl Airport to Castries?

Best airlines flying from Washington, D.C. Dulles Intl Airport to Castries

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Castries with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $592Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

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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