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Castries

$259+ 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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SLU
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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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 September 15, 2025.

Round-trip from

$823
(Mytrip)

One-way from

$259
(Kiwi.com)

Popular in

July

Cheapest in

November

Average price

$915
From Washington, D.C. (WAS) to Castries George F. L. Charle
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One-way flight from Washington, D.C. (WAS) to Castries George F. L. Charle
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Highest demand for flights based on searches. 9% potential increase in price ($81 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 15, 2025.

This Mytrip deal was found by Cheapflights users on 9/13. 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 9/2112:55 pmDCA - SLU
3 stops28h 35mMultiple Airlines
Tue 9/237:30 amSLU - DCA
2 stops25h 29mMultiple Airlines
Deal found 9/13$787
This Mytrip deal was found by Cheapflights users on 9/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/34:10 pmDCA - SLU
3 stops25h 50mMultiple Airlines
Sun 12/712:10 pmSLU - DCA
2 stops23h 16mMultiple Airlines
Deal found 9/14$823
This Mytrip deal was found by Cheapflights users on 9/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/37:00 amBWI - SLU
3 stops35h 00mMultiple Airlines
Sun 12/712:30 pmSLU - BWI
3 stops29h 19mMultiple Airlines
Deal found 9/14$826
This Mytrip deal was found by Cheapflights users on 9/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/278:40 pmDCA - SLU
2 stops22h 20mMultiple Airlines
Sat 10/412:35 pmSLU - DCA
3 stops23h 33mMultiple Airlines
Deal found 9/14$830
This Mytrip deal was found by Cheapflights users on 9/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/272:25 pmIAD - SLU
2 stops28h 35mMultiple Airlines
Sat 10/412:35 pmSLU - IAD
2 stops21h 03mMultiple Airlines
Deal found 9/14$852
This Mytrip deal was found by Cheapflights users on 9/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/24:30 pmIAD - SLU
2 stops25h 30mMultiple Airlines
Sat 12/612:35 pmSLU - IAD
3 stops28h 16mMultiple Airlines
Deal found 9/14$853
This Mytrip deal was found by Cheapflights users on 9/15. 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.
Thu 11/139:45 amIAD - SLU
3 stops24h 45mMultiple Airlines
Mon 11/1712:35 pmSLU - IAD
3 stops33h 19mMultiple Airlines
Deal found 9/15$872
This Mytrip deal was found by Cheapflights users on 9/15. 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.
Thu 11/138:40 pmDCA - SLU
3 stops39h 30mMultiple Airlines
Mon 11/179:10 amSLU - DCA
3 stops26h 16mMultiple Airlines
Deal found 9/15$959
This Mytrip deal was found by Cheapflights users on 9/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/24:25 pmIAD - SLU
2 stops22h 25mMultiple Airlines
Fri 11/71:55 pmSLU - IAD
3 stops31h 59mMultiple Airlines
Deal found 9/14$960
This Mytrip deal was found by Cheapflights users on 9/13. 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 10/304:30 pmIAD - SLU
3 stops20h 40mMultiple Airlines
Mon 11/312:35 pmSLU - IAD
2 stops28h 16mMultiple Airlines
Deal found 9/13$1,030
This Mytrip deal was found by Cheapflights users on 9/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/34:30 pmIAD - SLU
2 stops25h 30mMultiple Airlines
Sun 12/75:00 amSLU - IAD
2 stops17h 20mMultiple Airlines
Deal found 9/14$1,139
This Mytrip deal was found by Cheapflights users on 9/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/248:40 pmDCA - SLU
3 stops35h 50mMultiple Airlines
Sat 11/2912:35 pmSLU - DCA
3 stops24h 44mMultiple Airlines
Deal found 9/14$1,162

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 September 15, 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 12/3

4:10 pm-7:00 pm

3 stops25h 50m

Castries George F. L. Charle

Sun 12/7

12:10 pm-10:26 am

2 stops23h 16m

$823

BaltimoreCastries

BWI - SLU

BWISLU

Baltimore/Washington

Wed 12/3

7:00 am-7:00 pm

3 stops35h 00m

Castries George F. L. Charle

Sun 12/7

12:30 pm-4:49 pm

3 stops29h 19m

$826

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Sat 9/27

12:55 pm-7:00 pm

3 stops30h 05m

Castries George F. L. Charle

Sat 10/4

12:35 pm-12:08 pm

3 stops23h 33m

$830

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Tue 12/2

4:30 pm-7:00 pm

2 stops25h 30m

Castries George F. L. Charle

Sat 12/6

12:35 pm-3:51 pm

3 stops28h 16m

$853

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Thu 11/13

9:45 am-11:30 am

3 stops24h 45m

Castries George F. L. Charle

Mon 11/17

12:35 pm-8:54 pm

3 stops33h 19m

$872

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Thu 11/13

8:40 pm-1:10 pm

3 stops39h 30m

Castries George F. L. Charle

Mon 11/17

9:10 am-10:26 am

3 stops26h 16m

$959

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Sun 11/2

4:25 pm-3:50 pm

2 stops22h 25m

Castries George F. L. Charle

Fri 11/7

1:55 pm-8:54 pm

3 stops31h 59m

$960

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Thu 10/30

4:30 pm-1:10 pm

3 stops20h 40m

Castries George F. L. Charle

Mon 11/3

12:35 pm-3:51 pm

2 stops28h 16m

$1,030

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Wed 12/3

4:30 pm-7:00 pm

2 stops25h 30m

Castries George F. L. Charle

Sun 12/7

5:00 am-9:20 pm

2 stops17h 20m

$1,139

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Mon 11/24

8:40 pm-9:30 am

3 stops35h 50m

Castries George F. L. Charle

Sat 11/29

12:35 pm-12:19 pm

3 stops24h 44m

$1,162

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 19 results
1
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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, August is the cheapest month in which you can book a flight from Washington, D.C. to Castries (average of $525). Flying from Washington, D.C. to Castries in July is currently the most expensive (average of $767). 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 September 15, 2025.

It’s typically best to fly out from Washington, D.C. to Castries at noon. Doing so could potentially save you 7% on the flight price compared to flying in the morning, 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 September 15, 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
10,000 reviews

Boarding

7.5

Entertainment

6.9

Food

6.4

Overall

7.2

Crew

8.0

Comfort

7.2

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
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Entertainment

6.9

Food

6.4

Overall

7.2

Crew

8.0

Comfort

7.2

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, August is the cheapest month in which you can book a flight from Washington, D.C. to Castries (average of $525). Flying from Washington, D.C. to Castries in July is currently the most expensive (average of $767). 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
Rodney Bay
Gros Islet
Marigot Bay

Browse thousands of different options on Cheapflights for your next trip

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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$641Average$840FlexibilityNo cancel feeOn-time71%

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