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. 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.

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 $740 for the month, but tickets can be as low as $571. Due to multiple factors, prepare for potentially higher prices in July.

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.

$371+ Flights from Washington, D.C. to Castries

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

Round-trip from	$864 (Mytrip)
One-way from	$371 (Kiwi.com)
Popular in	July
Cheapest in	January
Average price	$735

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

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Highest demand for flights based on searches. 4% potential increase in price ($35 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).

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Average for round-trip flights in June 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 junio 26, 2025.

dom. 7/1310:20 amIAD - SLU

2 stops31h 10mMultiple Airlines

dom. 7/2012:10 pmSLU - IAD

2 stops25h 32mMultiple Airlines

Deal found 6/25

$864

mié. 9/109:59 pmBWI - SLU

3 stops21h 01mMultiple Airlines

dom. 9/1412:30 pmSLU - BWI

3 stops30h 55mMultiple Airlines

Deal found 6/25

$868

jue. 7/2412:55 pmDCA - SLU

3 stops30h 05mMultiple Airlines

lun. 7/2812:35 pmSLU - DCA

3 stops21h 43mMultiple Airlines

Deal found 6/25

$875

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 junio 26, 2025.

dom. 7/1310:20 amIAD - SLU

2 stops31h 10mMultiple Airlines

dom. 7/2012:10 pmSLU - IAD

2 stops25h 32mMultiple Airlines

Deal found 6/25

$864

mié. 9/109:59 pmBWI - SLU

3 stops21h 01mMultiple Airlines

dom. 9/1412:30 pmSLU - BWI

3 stops30h 55mMultiple Airlines

Deal found 6/25

$868

jue. 7/2412:55 pmDCA - SLU

3 stops30h 05mMultiple Airlines

lun. 7/2812:35 pmSLU - DCA

3 stops21h 43mMultiple Airlines

Deal found 6/25

$875

Last-minute flights from Washington, D.C. to Castries
Discover last-minute flight deals from Washington, D.C. to Castries. Data last updated junio 26, 2025 and is based on user searches.

mar. 7/110:20 amIAD - SLU

2 stops32h 40mMultiple Airlines

jue. 7/312:35 pmSLU - IAD

2 stops21h 02mMultiple Airlines

Deal found 6/24

$934

mié. 7/212:55 pmDCA - SLU

3 stops30h 05mMultiple Airlines

mié. 7/912:35 pmSLU - DCA

3 stops27h 13mMultiple Airlines

Deal found 6/25

$902

jue. 7/35:45 amBWI - SLU

3 stops29h 45mMultiple Airlines

jue. 7/1012:35 pmSLU - BWI

3 stops33h 46mMultiple Airlines

Deal found 6/23

$982

mié. 7/96:40 pmBWI - SLU

3 stops40h 50mMultiple Airlines

mié. 7/1612:35 pmSLU - BWI

3 stops33h 46mMultiple Airlines

Deal found 6/25

$940

dom. 7/1310:20 amIAD - SLU

2 stops31h 10mMultiple Airlines

dom. 7/2012:10 pmSLU - IAD

2 stops25h 32mMultiple Airlines

Deal found 6/25

$864

jue. 7/2412:55 pmDCA - SLU

3 stops30h 05mMultiple Airlines

lun. 7/2812:35 pmSLU - DCA

3 stops21h 43mMultiple Airlines

Deal found 6/25

$875

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 junio 26, 2025.

vie. 7/119:58 pmIAD - SLU

2 stops24h 12mMultiple Airlines

Deal found 6/24

$371

sáb. 7/2612:55 pmDCA - SLU

3 stops30h 05mMultiple Airlines

Deal found 6/24

$373

sáb. 7/266:48 amBWI - SLU

3 stops28h 37mMultiple Airlines

Deal found 6/24

$388

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

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

dom. 7/13

10:20 am-5:30 pm

2 stops31h 10m

Castries George F. L. Charle

dom. 7/20

12:10 pm-1:42 pm

2 stops25h 32m

$864

BaltimoreCastries

BWI - SLU

BWISLU

Baltimore/Washington

mié. 9/10

9:59 pm-7:00 pm

3 stops21h 01m

Castries George F. L. Charle

dom. 9/14

12:30 pm-7:25 pm

3 stops30h 55m

$868

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

jue. 7/24

12:55 pm-7:00 pm

3 stops30h 05m

Castries George F. L. Charle

lun. 7/28

12:35 pm-10:18 am

3 stops21h 43m

$875

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

vie. 7/11

9:58 pm-10:10 pm

2 stops24h 12m

$371

Washington, D.C.Castries

DCA - SLU

DCASLU

Washington, D.C. Reagan-National

sáb. 7/26

12:55 pm-7:00 pm

3 stops30h 05m

$373

BaltimoreCastries

BWI - SLU

BWISLU

Baltimore/Washington

sáb. 7/26

6:48 am-11:25 am

3 stops28h 37m

$388

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/24

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.

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

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. 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.

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Alternative routes for Washington, D.C. to Castries

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

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$535	Average$831	FlexibilityNo cancel fee	On-time71%

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$371+ 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 7/11. 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

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

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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 junio 26, 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 junio 26, 2025.

Cheapflights Fare Finder

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

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 junio 26, 2025.

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

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?

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Alternative routes for Washington, D.C. to Castries

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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 junio 26, 2025.