What is the cheapest day to fly from Washington, D.C. to Castries?

Travelers seeking maximum savings on their Washington, D.C. to Castries flight should consider departing on Monday mornings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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. Reagan-National - Castries George F. L. Charle, Washington, D.C. Dulles Intl - Castries George F. L. Charle or Baltimore/Washington - Castries George F. L. Charle as they are the most popular.

What is the cheapest day to fly round-trip from Washington, D.C. to Castries?

Sunday is generally a great day to depart. Flying on this day could help you save up to 26%.

What is the cheapest month to fly from Washington, D.C. to Castries?

Our data shows that January tends to be the cheapest month to fly to Castries from Washington, D.C.. Users have commonly found prices around $758 for the month, but tickets can be as low as $571. Due to multiple factors, prepare for potentially higher prices in December.

Most accurate provider : When it comes to deals on Washington, D.C.-Castries flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-Castries flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

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.

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.

$397+ Flights from Washington, D.C. to Castries

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Washington, D.C. to Castries with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$832 (Mytrip)
One-way from	$397 (Kiwi.com)
Popular in	December
Cheapest in	January
Average price	$772

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. 11% potential increase in price ($99 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($38 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

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 April 1, 2025.

Thu 6/194:50 pmBWI - SLU

2 stops18h 40mMultiple Airlines

Thu 6/266:20 pmSLU - BWI

2 stops25h 03mMultiple Airlines

Deal found 4/1

$818

Mon 4/1410:14 pmIAD - SLU

3 stops20h 46mMultiple Airlines

Fri 5/1612:15 pmSLU - IAD

2 stops25h 26mMultiple Airlines

Deal found 3/31

$856

Mon 4/146:40 pmDCA - SLU

2 stops21h 15mMultiple Airlines

Fri 5/1612:15 pmSLU - DCA

3 stops27h 34mMultiple Airlines

Deal found 3/31

$858

Best flights from Washington, D.C. to Castries
Discover carefully curated flight deals from Washington, D.C. to Castries that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 1, 2025.

Thu 5/110:27 amBWI - SLU

2 stops25h 03mMultiple Airlines

Sun 5/45:00 amSLU - BWI

2 stops28h 22mMultiple Airlines

Deal found 3/31

$832

Mon 4/1410:14 pmIAD - SLU

3 stops20h 46mMultiple Airlines

Fri 5/1612:15 pmSLU - IAD

2 stops25h 26mMultiple Airlines

Deal found 3/31

$856

Mon 4/146:40 pmDCA - SLU

2 stops21h 15mMultiple Airlines

Fri 5/1612:15 pmSLU - DCA

3 stops27h 34mMultiple Airlines

Deal found 3/31

$858

Last-minute flights from Washington, D.C. to Castries
Discover last-minute flight deals from Washington, D.C. to Castries. Data last updated April 1, 2025 and is based on user searches.

Wed 4/26:35 amBWI - SLU

3 stops28h 30mMultiple Airlines

Wed 4/94:25 pmSLU - BWI

3 stops28h 09mMultiple Airlines

Deal found 4/1

$1,081

Sun 4/66:00 amDCA - SLU

2 stops13h 00mMultiple Airlines

Tue 4/87:30 amSLU - DCA

2 stops25h 23mMultiple Airlines

Deal found 3/31

$917

Sun 4/65:30 amBWI - SLU

3 stops34h 20mMultiple Airlines

Tue 4/84:25 pmSLU - BWI

3 stops30h 25mMultiple Airlines

Deal found 3/31

$1,125

Sun 4/612:40 pmIAD - SLU

2 stops27h 10mMultiple Airlines

Wed 4/910:15 amSLU - IAD

2 stops29h 53mMultiple Airlines

Deal found 3/31

$3,405

Mon 4/1410:14 pmIAD - SLU

3 stops20h 46mMultiple Airlines

Fri 5/1612:15 pmSLU - IAD

2 stops25h 26mMultiple Airlines

Deal found 3/31

$856

Mon 4/146:40 pmDCA - SLU

2 stops21h 15mMultiple Airlines

Fri 5/1612:15 pmSLU - DCA

3 stops27h 34mMultiple Airlines

Deal found 3/31

$858

One-way flights from Washington, D.C. to Castries
Search for one-way flight options from Washington, D.C. to Castries. Find affordable one-way fares based on user searches. Data last updated April 1, 2025.

Mon 4/149:29 pmBWI - SLU

2 stops36h 01mMultiple Airlines

Deal found 3/31

$397

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to Castries that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreCastries

BWI - SLU

BWISLU

Baltimore/Washington

Thu 6/19

4:50 pm-11:30 am

2 stops18h 40m

Castries George F. L. Charle

Thu 6/26

6:20 pm-7:23 pm

2 stops25h 03m

$818

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

Mon 4/14

10:14 pm-7:00 pm

3 stops20h 46m

Castries George F. L. Charle

Fri 5/16

12:15 pm-1:41 pm

2 stops25h 26m

$856

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

Mon 4/14

6:40 pm-3:55 pm

2 stops21h 15m

Castries George F. L. Charle

Fri 5/16

12:15 pm-3:49 pm

3 stops27h 34m

$858

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

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

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 April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*1 star

*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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-Castries flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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, 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?

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.

Related info for your journey

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. Reagan-National - Castries George F. L. Charle, Washington, D.C. Dulles Intl - 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

Gros Islet

Marigot Bay

Rodney Bay

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Washington, D.C. to Castries

Dulles Intl to Castries flights

Reagan-National to Castries flights

Other flights to Castries

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

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$535	Average$786	FlexibilityNo cancel fee	On-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$397+ 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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Washington, D.C. to Castries with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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

Cheapest flights from Washington, D.C. to CastriesExplore 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 April 1, 2025.

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 April 1, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to Castries that are best for you.

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 April.

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.

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?

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 April 1, 2025.

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.?

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

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

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

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

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

Traveling to a place near Washington, D.C.?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington, D.C. to Castries

See prices for flight routes from nearby airports that may be better suited for you.

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

100% Free

Book with Flexibility

Travel Smart

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 April 1, 2025.