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Castries

$468+ Cheap flights from Washington, D.C. (WAS) to Castries (SLU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/13. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SLU
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find 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 October 30, 2025.

This Mytrip deal was found by Cheapflights users on 10/28. 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 11/56:59 amDCA - SLU
2 stops35h 01mMultiple Airlines
Sun 11/912:10 pmSLU - DCA
2 stops23h 16mMultiple Airlines
Deal found 10/28$804
This Mytrip deal was found by Cheapflights users on 10/30. 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.
Sun 11/1611:05 amDCA - SLU
3 stops29h 25mMultiple Airlines
Wed 11/199:10 amSLU - DCA
3 stops31h 21mMultiple Airlines
Deal found 10/30$814
This Mytrip deal was found by Cheapflights users on 10/27. 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.
Thu 11/66:59 amDCA - SLU
2 stops35h 01mMultiple Airlines
Tue 11/117:30 amSLU - DCA
3 stops27h 56mMultiple Airlines
Deal found 10/27$817
This Mytrip deal was found by Cheapflights users on 10/30. 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.
Sun 11/169:45 amIAD - SLU
3 stops30h 45mMultiple Airlines
Wed 11/199:10 amSLU - IAD
2 stops31h 36mMultiple Airlines
Deal found 10/30$836
This Mytrip deal was found by Cheapflights users on 10/29. 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 11/59:45 amIAD - SLU
3 stops32h 15mMultiple Airlines
Sun 11/912:10 pmSLU - IAD
3 stops28h 36mMultiple Airlines
Deal found 10/29$837
This Mytrip deal was found by Cheapflights users on 10/27. 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.
Mon 11/109:45 amIAD - SLU
3 stops32h 15mMultiple Airlines
Mon 11/1712:35 pmSLU - IAD
2 stops28h 11mMultiple Airlines
Deal found 10/27$850
This Mytrip deal was found by Cheapflights users on 10/30. 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 11/1212:55 pmDCA - SLU
3 stops29h 05mMultiple Airlines
Wed 11/199:10 amSLU - DCA
3 stops28h 09mMultiple Airlines
Deal found 10/30$855
This Mytrip deal was found by Cheapflights users on 10/30. 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.
Mon 11/179:45 amIAD - SLU
3 stops32h 15mMultiple Airlines
Wed 11/199:10 amSLU - IAD
2 stops31h 36mMultiple Airlines
Deal found 10/30$861
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Fri 11/284:30 pmIAD - SLU
3 stops28h 40mMultiple Airlines
Fri 12/51:55 pmSLU - IAD
3 stops32h 04mMultiple Airlines
Deal found 10/29$863
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Sun 12/148:45 amBWI - SLU
2 stops29h 50mMultiple Airlines
Sun 12/2112:10 pmSLU - BWI
3 stops36h 36mMultiple Airlines
Deal found 10/29$880
This Mytrip deal was found by Cheapflights users on 10/29. 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 11/297:30 amBWI - SLU
3 stops34h 30mMultiple Airlines
Sat 12/66:20 pmSLU - BWI
3 stops31h 03mMultiple Airlines
Deal found 10/29$984
This Mytrip deal was found by Cheapflights users on 10/30. 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.
Mon 11/245:40 amBWI - SLU
2 stops11h 25mMultiple Airlines
Wed 12/33:45 pmSLU - BWI
3 stops33h 00mMultiple Airlines
Deal found 10/30$998

Cheap 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$814
(Mytrip)

One-way from

$468
(Mytrip)

Popular in

December

Cheapest in

October

Average price

$601
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
One-way flight from Washington, D.C. (WAS) to Castries George F. L. Charle
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 30, 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

Wed 11/5

6:59 am-7:00 pm

2 stops35h 01m

Castries George F. L. Charle

Sun 11/9

12:10 pm-10:26 am

2 stops23h 16m

$804

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Sun 11/16

11:05 am-5:30 pm

3 stops29h 25m

Castries George F. L. Charle

Wed 11/19

9:10 am-8:55 am

2 stops24h 45m

$814

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

Tue 11/11

7:30 am-10:26 am

3 stops27h 56m

$817

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Wed 11/5

9:45 am-7:00 pm

3 stops32h 15m

Castries George F. L. Charle

Sun 11/9

12:10 pm-3:46 pm

3 stops28h 36m

$836

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Sun 11/16

9:00 am-5:30 pm

2 stops31h 30m

Castries George F. L. Charle

Wed 11/19

9:10 am-3:46 pm

2 stops31h 36m

$836

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Mon 11/10

4:30 pm-7:00 pm

2 stops25h 30m

Castries George F. L. Charle

Mon 11/17

12:35 pm-3:46 pm

2 stops28h 11m

$850

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Mon 11/17

9:45 am-7:00 pm

3 stops32h 15m

Castries George F. L. Charle

Wed 11/19

9:10 am-3:46 pm

2 stops31h 36m

$861

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Fri 11/28

4:30 pm-10:10 pm

3 stops28h 40m

Castries George F. L. Charle

Fri 12/5

1:55 pm-8:59 pm

3 stops32h 04m

$863

BaltimoreCastries

BWI - SLU

BWISLU

Baltimore/Washington

Sun 12/14

8:45 am-3:35 pm

2 stops29h 50m

Castries George F. L. Charle

Sun 12/21

12:10 pm-11:46 pm

3 stops36h 36m

$880

BaltimoreCastries

BWI - SLU

BWISLU

Baltimore/Washington

Sun 1/4

9:09 pm-6:05 pm

3 stops19h 56m

Castries George F. L. Charle

Sat 1/10

6:20 pm-11:54 pm

2 stops30h 34m

$888

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 19 results
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
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 June is currently the most expensive (average of $649). 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 October 30, 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.

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 October 30, 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
11,034 reviews

Comfort

7.2

Food

6.4

Entertainment

6.9

Boarding

7.5

Overall

7.2

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac
American Airlines
7.2
Good
11,034 reviews
American Airlines
7.2
Good
11,034 reviews

Comfort

7.2

Food

6.4

Entertainment

6.9

Boarding

7.5

Overall

7.2

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

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 June is currently the most expensive (average of $649). 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$610Average$840FlexibilityNo cancel feeOn-time71%

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