WAS - SLU

$362 Find Cheap Flights from Washington, D.C. to Castries

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Castries departing on 2/24. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Castries

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Castries, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Castries, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$873
Multiple Airlines
Thu 2/5Mon 2/9
DCA - SLU • 2 stops
Cheapest one-way
$362
Multiple Airlines
Tue 2/24
BWI - SLU • 3 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Castries!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Washington, D.C. to Castries (WAS-SLU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Castries that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Castries

Thu, Feb 5 - Mon, Feb 9
Multiple Airlines Logo
6:00 am - 7:00 pm
DCA
-
SLU
12h 00m
2 stops
Multiple Airlines Logo
12:35 pm - 8:55 am
SLU
-
DCA
21h 20m
2 stops
$873Multiple Airlines
Mon, Mar 9 - Mon, Mar 16
Multiple Airlines Logo
6:00 am - 6:25 pm
DCA
-
SLU
12h 25m
2 stops
Multiple Airlines Logo
12:35 pm - 9:56 pm
SLU
-
DCA
33h 21m
2 stops
$908Multiple Airlines
Mon, Mar 9 - Mon, Mar 16
Multiple Airlines Logo
12:55 pm - 6:25 pm
DCA
-
SLU
29h 30m
3 stops
Multiple Airlines Logo
9:10 am - 10:21 am
SLU
-
DCA
25h 11m
2 stops
$914Multiple Airlines
Thu, Feb 5 - Mon, Feb 9
Multiple Airlines Logo
12:55 pm - 6:25 pm
DCA
-
SLU
28h 30m
3 stops
Multiple Airlines Logo
12:35 pm - 10:21 am
SLU
-
DCA
22h 46m
2 stops
$1,008Multiple Airlines
Sat, Mar 7 - Wed, Mar 11
Multiple Airlines Logo
6:50 pm - 2:50 pm
DCA
-
SLU
19h 00m
2 stops
Multiple Airlines Logo
12:35 pm - 6:05 pm
SLU
-
DCA
29h 30m
3 stops
$1,009Multiple Airlines
Fri, Feb 20 - Fri, Feb 27
Multiple Airlines Logo
12:55 pm - 7:00 pm
DCA
-
SLU
29h 05m
3 stops
Multiple Airlines Logo
7:10 pm - 6:05 pm
SLU
-
DCA
23h 55m
2 stops
$1,083Multiple Airlines
Fri, Feb 20 - Fri, Feb 27
Multiple Airlines Logo
6:00 am - 6:25 pm
DCA
-
SLU
11h 25m
2 stops
Multiple Airlines Logo
7:10 pm - 6:05 pm
SLU
-
DCA
23h 55m
2 stops
$1,085Multiple Airlines
Fri, Feb 20 - Fri, Feb 27
Multiple Airlines Logo
9:45 am - 7:00 pm
IAD
-
SLU
32h 15m
3 stops
Multiple Airlines Logo
7:10 pm - 8:29 pm
SLU
-
IAD
26h 19m
2 stops
$1,099Multiple Airlines
Sat, Mar 7 - Wed, Mar 11
Multiple Airlines Logo
5:13 pm - 2:50 pm
IAD
-
SLU
20h 37m
2 stops
Multiple Airlines Logo
12:35 pm - 11:46 am
SLU
-
IAD
23h 11m
3 stops
$1,175Multiple Airlines
Sat, Mar 28 - Sat, Apr 4
Multiple Airlines Logo
6:50 pm - 7:00 pm
DCA
-
SLU
24h 10m
2 stops
Multiple Airlines Logo
12:35 pm - 12:01 pm
SLU
-
DCA
23h 26m
3 stops
$1,181Multiple Airlines
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Castries flights

Get data-powered insights and trends into flights from Washington, D.C. to Castries to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Washington, D.C. to Castries?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. to Castries departing in February.
Find deals

Good to know

Low seasonDecember
Cheapest flight$362
Best time to beat the crowds with an average 47% drop in price.
Most popular time to fly and prices are also 25% lower on average.
Flight from Baltimore to Castries

When to book flights from Washington, D.C. to Castries

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Castries based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Washington, D.C. to Castries

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Castries was $362 for a one-way ticket and $873 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Castries?

    Yes

  • Which aircraft models fly most regularly from Washington, D.C. to Castries?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Castries?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Castries.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Castries?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Castries from Washington, D.C. is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington, D.C. to Castries?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Castries with an airline and back to Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Castries?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Castries from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Washington, D.C. to Castries

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Castries. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Washington, D.C. to Castries? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 11197 reviews
8.0Crew
7.5Boarding
7.2Comfort
6.9Entertainment
6.4Food
Airline reviews

one crew said "he" didn't serve double alcohol drinks for travelers in exit rows. crew on prior flight did. Is this a AA rule, and the prior crew was being nice? Also, I think we deserve more than a 25% refund for losing first class seats when rescheduling a flight due to weather

8.0 ExcellentAnonymous, Jan 2026
PHX - CMH
Read more American Airlines reviews

one crew said "he" didn't serve double alcohol drinks for travelers in exit rows. crew on prior flight did. Is this a AA rule, and the prior crew was being nice? Also, I think we deserve more than a 25% refund for losing first class seats when rescheduling a flight due to weather

It was a little concerning to hear the ground crew arguing with the flight crew over baggage space. Instead of taking them and checking them, they started checking for space in the first class cabin moving items around like the flight crew didn't know what they were doing. I was embarrassed for them.

2 hour delay due to equipment failure. No updates via the app and airport screens (which continued to show a departure time in the past). AA eventually switched planes and the new plane was not catered or cleaned correctly.

I booked an aisle seat and was given a middle. At 6'4" 230lbs, it is not ideal to fly in the middle row for myself and passengers.

Trip delayed for 2 hours because of rain. We boarded and have to get down the flight and reboard again.

The aircraft had several problems - from excess fuel to non operational ac. Two hours of delay in Chicago could have been avoided with proper planning and aircraft maintenance.

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Long delays, lack of information about the status of the flight. The flight was delayed 4 times.

Could we please end the loud announcements about credit card offers on your flights? We are trying to sleep, work, watch videos, etc. and if we need a credit card, we will ask for one. Flying is already not what it used to be.

I would like the crew to talk LESS over the PA and specifically about credit card offers. I am trying to work, sleep, watch a movie and the PA was booming about a credit card offer. Could we go back to the days when the customer was more important than selling a credit card?

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

Information on your arrival and departure airports

Castries (SLU)