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Castries

$918+ Cheap flights from Washington, D.C. (WAS) to Castries (SLU)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SLU
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Castries

Cheapest flights from Washington, D.C. to Castries
Explore the most affordable flight options available from Washington, D.C. to Castries. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Mytrip deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amDCA - SLU
2 stops12h 00mMultiple Airlines
Sun 1/45:00 amSLU - DCA
2 stops28h 55mMultiple Airlines
Deal found 12/15$1,661
This Mytrip deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:16 pmIAD - SLU
2 stops18h 54mMultiple Airlines
Sun 1/45:00 amSLU - IAD
3 stops31h 35mMultiple Airlines
Deal found 12/15$2,308
This Mytrip deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:00 amDCA - SLU
2 stops12h 00mMultiple Airlines
Fri 1/212:35 pmSLU - DCA
2 stops21h 20mMultiple Airlines
Deal found 12/16$2,534
This Mytrip deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:59 amDCA - SLU
3 stops33h 36mMultiple Airlines
Fri 1/21:55 pmSLU - DCA
2 stops20h 00mMultiple Airlines
Deal found 12/15$2,564
This Expedia deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:06 pmIAD - SLU
2 stops38h 04mMultiple Airlines
Sat 1/36:20 pmSLU - IAD
2 stops51h 09mMultiple Airlines
Deal found 12/14$3,469
This Expedia deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:50 pmDCA - SLU
2 stops13h 40mMultiple Airlines
Sat 1/36:20 pmSLU - DCA
2 stops53h 15mMultiple Airlines
Deal found 12/14$3,490
This Expedia deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:06 pmIAD - SLU
2 stops38h 04mMultiple Airlines
Mon 1/54:20 pmSLU - IAD
2 stops54h 05mMultiple Airlines
Deal found 12/17$3,498
This Expedia deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:50 pmDCA - SLU
2 stops13h 40mMultiple Airlines
Mon 1/54:20 pmSLU - DCA
2 stops50h 45mMultiple Airlines
Deal found 12/17$3,498
This Expedia deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2310:06 pmIAD - SLU
2 stops38h 04mMultiple Airlines
Wed 12/3110:15 amSLU - IAD
2 stops36h 10mMultiple Airlines
Deal found 12/16$4,034
This Expedia deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1510:11 pmIAD - SLU
2 stops34h 19mMultiple Airlines
Mon 12/224:20 pmSLU - IAD
2 stops49h 10mMultiple Airlines
Deal found 12/14$4,056

Find flight deals from Washington, D.C. to Castries

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Castries (SLU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$918
(Mytrip)

Popular in

November

Cheapest in

October

Average price

$1,080
Provider with most accurate pricing for Washington, D.C. (WAS)-Castries George F. L. Charle flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Castries George F. L. Charle flights.
Search Deals
From Washington, D.C. (WAS) to Castries George F. L. Charle
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($268 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease ($88 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Castries that are best for you.

Fly from

Washington, D.C.

Fly to

Castries

Route

Depart

Return

Price

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Mon 2/23

12:55 pm-7:00 pm

3 stops29h 05m

Castries George F. L. Charle

Sun 3/1

7:10 pm-3:33 pm

3 stops21h 23m

$918

BaltimoreCastries

BWI - SLU

BWISLU

Baltimore/Washington

Mon 2/23

10:11 am-12:05 pm

3 stops24h 54m

Castries George F. L. Charle

Sun 3/1

7:10 pm-11:31 pm

2 stops29h 21m

$1,250

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Tue 3/10

12:33 pm-9:30 am

2 stops20h 57m

Castries George F. L. Charle

Sun 3/15

5:00 am-8:26 pm

2 stops15h 26m

$1,594

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Wed 12/31

6:00 am-7:00 pm

2 stops12h 00m

Castries George F. L. Charle

Sun 1/4

5:00 am-8:55 am

2 stops28h 55m

$1,661

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Wed 12/31

5:16 pm-1:10 pm

2 stops18h 54m

Castries George F. L. Charle

Sun 1/4

5:00 am-11:35 am

3 stops31h 35m

$2,308

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Sat 12/27

6:00 am-7:00 pm

2 stops12h 00m

Castries George F. L. Charle

Fri 1/2

12:35 pm-8:55 am

2 stops21h 20m

$2,534

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Wed 12/24

6:59 am-5:35 pm

3 stops33h 36m

Castries George F. L. Charle

Fri 1/2

1:55 pm-8:55 am

2 stops20h 00m

$2,564

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Wed 1/14

9:00 am-3:15 pm

2 stops53h 15m

Castries George F. L. Charle

Wed 1/21

10:15 am-11:48 am

2 stops26h 33m

$3,365

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Mon 2/23

10:09 pm-9:30 am

2 stops34h 21m

Castries George F. L. Charle

Sun 3/1

5:00 am-9:21 pm

2 stops41h 21m

$3,365

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Thu 1/8

9:00 am-11:30 am

2 stops25h 30m

Castries George F. L. Charle

Sun 1/11

7:10 pm-9:25 pm

2 stops27h 15m

$3,365

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 16 results
1
2

Compare providers for flights from Washington, D.C. to Castries

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to Castries in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C.-Castries flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C.-Castries flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Castries flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-Castries flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-Castries flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Washington, D.C. to Castries

Have a flexible travel schedule? Discover the best time to fly to Castries from Washington, D.C. with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Castries

What is the cheapest month to book a flight from Washington, D.C. to Castries?

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. to Castries (average of $179). Flying from Washington, D.C. to Castries in August is currently the most expensive (average of $551). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WAS to SLU?

Find hourly flight availability from Washington, D.C. to Castries. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

It’s typically best to fly out from Washington, D.C. to Castries at noon. Doing so could potentially save you 28% on the flight price compared to flying in the evening, which is usually more expensive.

How much does it cost to fly round-trip from Washington, D.C. to Castries?

Reviews of airlines servicing Castries

Get insights into the airlines that provide service to Castries. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Castries. Reviews last updated December 18, 2025.
Get a feel of what it's like to fly with American Airlines from Washington, D.C. to Castries by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,054 reviews

Entertainment

6.9

Boarding

7.5

Overall

7.2

Food

6.5

Crew

8.0

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit
American Airlines
7.2
Good
11,054 reviews
American Airlines
7.2
Good
11,054 reviews

Entertainment

6.9

Boarding

7.5

Overall

7.2

Food

6.5

Crew

8.0

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Castries. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Castries from Washington, D.C.?

    Most people fly into Castries George F. L. Charle (SLU) if they book a flight to Castries from Washington, D.C.. On average, George F. L. Charle has 0 inbound flights from Washington, D.C. per day from 1 airline. Castries George F. L. Charle is conveniently located just 0.7 mi from Castries’s city center.

  • What are the most popular routes from Washington, D.C. to Castries?

    When deciding which route to take from Washington, D.C. to Castries consider Washington, D.C. Dulles Intl - Castries George F. L. Charle, Washington, D.C. Reagan-National - Castries George F. L. Charle or Baltimore/Washington - Castries George F. L. Charle as they are the most popular.

  • Can I find deals for flights from Washington, D.C. to Castries that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Castries flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Castries?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Castries.

  • Can I find deals for business class flights from Washington, D.C. to Castries?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Castries by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. to Castries?

    Currently, November is the cheapest month in which you can book a flight from Washington, D.C. to Castries (average of $179). Flying from Washington, D.C. to Castries in August is currently the most expensive (average of $551). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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

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Alternative routes for Washington, D.C. to Castries

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Castries flights
Reagan-National to Castries flights

Top airline flying from Washington, D.C. to Castries

Discover the top airline that operate flights from Washington, D.C. to Castries. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$525Average$937FlexibilityNo cancel feeOn-time71%

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