WAS - SLU

$396 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 5/2. 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
$1,045
Multiple Airlines
Tue 7/14Sat 7/18
IAD - SLU • 2 stops
Cheapest one-way
$396
Multiple Airlines
Sat 5/2
IAD - 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

Tue, Jul 14 - Sat, Jul 18
Multiple Airlines Logo
4:20 pm - 7:00 pm
IAD
-
SLU
26h 40m
2 stops
Multiple Airlines Logo
12:35 pm - 4:12 pm
SLU
-
IAD
27h 37m
2 stops
$1,045Multiple Airlines
Fri, Apr 17 - Fri, Apr 24
Multiple Airlines Logo
6:59 am - 1:10 pm
DCA
-
SLU
30h 11m
2 stops
Multiple Airlines Logo
6:00 pm - 10:43 pm
SLU
-
DCA
28h 43m
2 stops
$1,056Multiple Airlines
Thu, May 7 - Sun, May 10
Multiple Airlines Logo
6:00 am - 7:00 pm
BWI
-
SLU
13h 00m
3 stops
Multiple Airlines Logo
5:00 am - 10:00 am
SLU
-
BWI
29h 00m
3 stops
$1,080Multiple Airlines
Thu, May 14 - Mon, May 18
Multiple Airlines Logo
12:45 pm - 2:35 pm
DCA
-
SLU
25h 50m
3 stops
Multiple Airlines Logo
7:10 pm - 7:58 pm
SLU
-
DCA
24h 48m
2 stops
$1,087Multiple Airlines
Fri, Apr 17 - Fri, Apr 24
Multiple Airlines Logo
9:40 am - 1:10 pm
DCA
-
SLU
27h 30m
2 stops
Multiple Airlines Logo
6:00 pm - 7:53 pm
SLU
-
DCA
25h 53m
2 stops
$1,100Multiple Airlines
Fri, Apr 17 - Fri, Apr 24
Multiple Airlines Logo
9:40 am - 1:10 pm
DCA
-
SLU
27h 30m
2 stops
Multiple Airlines Logo
6:00 pm - 3:30 pm
SLU
-
DCA
21h 30m
3 stops
$1,103Multiple Airlines
Wed, Jul 1 - Sun, Jul 5
Multiple Airlines Logo
9:55 am - 7:00 pm
IAD
-
SLU
33h 05m
2 stops
Multiple Airlines Logo
9:10 am - 4:12 pm
SLU
-
IAD
31h 02m
2 stops
$1,113Multiple Airlines
Tue, Jun 2 - Sun, Jun 7
Multiple Airlines Logo
12:45 pm - 9:30 am
DCA
-
SLU
20h 45m
3 stops
Multiple Airlines Logo
5:00 am - 12:01 pm
SLU
-
DCA
31h 01m
3 stops
$1,154Multiple Airlines
Wed, Apr 15 - Wed, Apr 22
Multiple Airlines Logo
12:55 pm - 7:00 pm
DCA
-
SLU
30h 05m
3 stops
Multiple Airlines Logo
9:10 am - 12:01 pm
SLU
-
DCA
26h 51m
3 stops
$1,155Multiple Airlines
Fri, May 22 - Mon, May 25
Multiple Airlines Logo
8:40 pm - 7:00 pm
DCA
-
SLU
22h 20m
2 stops
Multiple Airlines Logo
9:10 am - 12:01 pm
SLU
-
DCA
26h 51m
3 stops
$1,157Multiple 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 July.
Find deals

Good to know

Low seasonJune
Best time to beat the crowds with an average 49% drop in price.
Most popular time to fly with an average 30% increase in price.

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 $396 for a one-way ticket and $1,045 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.
7.1
American AirlinesOverall score based on 11487 reviews
6.4Food
7.2Comfort
6.9Entertainment
7.5Boarding
7.9Crew
Airline reviews

Absolutely terrible. Would never fly American again. 2 deplaned incidents and delayed by close to 24 hours. $12 meal voucher for first class passengers was an insult to the injury. Pathetic.

2.0 MediocreSaurabh, Mar 2026
DFW - EWR
Read more American Airlines reviews

Absolutely terrible. Would never fly American again. 2 deplaned incidents and delayed by close to 24 hours. $12 meal voucher for first class passengers was an insult to the injury. Pathetic.

Terrible planning. And even worse gate agents. Absolutely rude behavior.

Half of the TSA checkpoints at PHL are closed. Also, there is no standby for first class passengers. You can only standby for coach. Very dated policy and inconsistent with peers.

Flight was scheduled at 11:26am but they keep Delaying until midnight. They waited at airport restless.

Rough flight No beverage service due to turbulence Bottom Seat cushion was non existent

Flight delay for mechanical. Inbound arrived on time. No one said why mechanical delay.

Flight boarded, departed and landed on time. Excellent service from flight attendant in FIRST

This was one of the most frustrating travel experiences I've had to date. I had changed my flight day of to this one as it was slated to depart on time. It ended up being so delayed that my original flight took off before this one did. The boarding process began but eventually stopped and everyone had to get off the plane as a problem was identified. The person at the front desk just tried to laugh it off as if this wasn't already a huge inconvenience. From there, we eventually got to board only to sit at the gate for an additional hour because of some additional issue. This was extremely frustrating and caused a lot of stress.

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.

delayed due to weather. Could not communicate with family since the wifi was broken

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

Information on your arrival and departure airports

Castries (SLU)