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C$327 Cheap Flights from Washington Ronald Reagan (DCA) to Castries (SLUA)

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Flight deals from Washington Ronald Reagan to Castries

Looking for a cheap last-minute deal or the best return flight from Washington Ronald Reagan Airport to Castries? If you want to travel next month, return fares start from C$917. Find the lowest prices on one-way and return tickets right here.
Castries.C$327 per passenger.Departing Tue., Apr. 28.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Washington Ronald Reagan on Tue., Apr. 28, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$327, select.
Castries.C$330 per passenger.Departing Thu., May 7.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Washington Ronald Reagan on Thu., May 7, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$330, select.
Castries.C$341 per passenger.Departing Thu., Jul. 16.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Washington Ronald Reagan on Thu., Jul. 16, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$341, select.
Castries.C$566 per passenger.Departing Tue., Nov. 3.One-way flight with Delta.Outbound indirect flight with Delta, departs from Washington Ronald Reagan on Tue., Nov. 3, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$566, select.
Castries.C$607 per passenger.Departing Fri., Jan. 15.One-way flight with Delta.Outbound indirect flight with Delta, departs from Washington Ronald Reagan on Fri., Jan. 15, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$607, select.
Castries.C$696 per passenger.Departing Wed., Jun. 10.One-way flight with Delta.Outbound indirect flight with Delta, departs from Washington Ronald Reagan on Wed., Jun. 10, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$696, select.
Castries.C$858 per passenger.Departing Sun., Dec. 27.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Washington Ronald Reagan on Sun., Dec. 27, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$858, select.

Find the cheapest month to fly from Washington Ronald Reagan to Castries

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Ronald Reagan to Castries flights are currently cheapest in April.
Apr.
from C$327
May
from C$330
Jun.
from C$696
Jul.
from C$341
Aug.
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Sep.
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Oct.
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Nov.
from C$566
Dec.
from C$858
Jan.
from C$607
Feb.
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Mar.
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Alternative Washington Ronald Reagan to Castries routes

Looking for the cheapest, fastest or easiest route from Washington Ronald Reagan to Castries? You could fly into the following airports instead.

St Lucia Vigie

1km from central Castries
Closest
from C$943
Search flights

St Lucia Hewanorra

31km from central Castries
Cheapest
from C$327
Search flights

Washington D.C. to Castries: Flight information

The things to know before you go.
Cheapest flight foundC$327
Cheapest month to flyApril

Finding cheap flights from Washington Ronald Reagan to Castries: Frequently asked questions

There are 2 airports in Castries: St Lucia Vigie and St Lucia Hewanorra.
The best price we found for a return flight from Washington Ronald Reagan to Castries is C$723. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Washington Ronald Reagan to Castries. But we found flights with one or more stops from C$723.
As of April 2026, there are no flights flying from Washington Ronald Reagan to Castries.
The cheapest month to fly from Washington Ronald Reagan to Castries is usually June.
If you're flying from Washington Ronald Reagan Airport, the cheapest airport near Castries is St Lucia Hewanorra – which is 30.5 km away from the centre of Castries. We've found flights into this airport from C$723.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Ronald Reagan Airport to Castries on Thursday, June 4, 2026.
No airlines currently offer direct flights between Washington Ronald Reagan Airport and Castries. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Castries but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Castries is around 40 days in advance, so don’t leave your flight to the last minute.
In April, the average temperature is usually around 27°C. September is typically the warmest month in Castries, when it usually averages around 28°C. You can expect the least rain in February. The coldest month is February, with temperatures averaging 25°C. The rainiest month is October.
Currently, Air Canada offers the cheapest flight tickets to Castries.

Travelling from Ronald Reagan National Airport (DCA) to Castries: what you need to know

  • Washington DC (the location of Ronald Reagan National Airport) and Castries share the same timezone — UTC-4.

  • For stress-free travel, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This way, you can comfortably catch your flight from DCA to Castries.

  • Popular months like July or vacation times such as Thanksgiving and Christmas/New Year will mean longer lines at check-in and security. Be on the safe side and get to the airport even earlier. Arriving two hours before a domestic flight and up four hours ahead of an international flight is a wise idea.

  • Think about adding a stopover to potentially find a cheaper flight from DCA to Castries. Just uncheck 'Direct flights only' when browsing the departures. Take a break (and maybe save some cash) by stopping at one of these popular options:

    • John F. Kennedy International Airport (JFK)

    • Newark Liberty International Airport (EWR)

    • Hartsfield-Jackson Atlanta International Airport (ATL)

  • You can visit Saint Lucia for tourism purposes without a visa if you have a passport from United States. But before booking your flight tickets from Ronald Reagan National Airport to Castries, make sure you have the most up-to-date information. Visa rules are subject to change, and you may require some travel documents if your trip is for work or another reason.

  • DCA is around 8 kilometres from central Washington DC. If you're catching a cab, driving or ride-sharing from the centre, it'll take 16 minutes or so to get there, depending on the traffic. If you're taking public transport, expect the trip time to be around 43 minutes.

  • Planning to catch an early flight from Ronald Reagan National Airport to Castries? Avoid the last-minute rush to the airport (and sneak in some extra precious sleep) by picking one of these hotels close to DCA:

How to find the cheapest flights from Ronald Reagan National Airport (DCA) to Castries

  • C$327 is the lowest price we've found for a one-way ticket from Ronald Reagan National Airport to Castries. For a return flight on this route, the best price is C$723. Depending on when and how early you book, these fares could change.

  • It's a good idea to book as early as possible if you're hoping to get cheap tickets from DCA to Castries. That's because flight prices are based on demand, which tends to rise closer to the departure date.

  • If you can be flexible with your travel plans, check out the 'Whole month' tool. It'll find the cheapest price across each month when looking for a ticket from Ronald Reagan National Airport to Castries.

  • Getting a cheap ticket from DCA to Castries is easy with Price Alerts. All you need to do is create one of these automatic alerts and we'll let you know as soon as there's a better deal.

  • Use the filters to tailor your flights from Ronald Reagan National Airport to Castries. Simply enter your preferred arrival and departure times, airlines and number of stops. Alternatively, sort your results by 'Cheapest' to find the best deals.

Airports in Castries

Hewanorra Airport (UVF)

  • Hewanorra Airport (UVF) to central Castries is approximately 56 kilometres. It'll take you around 1 hour and 9 minutes to get to the centre driving.

  • The last thing you want is a long journey to your hotel if you're landing late on a flight from Ronald Reagan National Airport to Castries. Book one of these accommodation options near UVF instead:

George F. L. Charles Airport (SLU)

  • George F. L. Charles Airport (SLU) is about 3 kilometres from the centre of Castries. Once you've disembarked your flight from Ronald Reagan National Airport to Castries, it'll take you around 6 minutes to reach the heart of the city in a cab or ride-share.

  • The trip will take approximately 40 minutes on public transport.

  • Hang up the 'Do not disturb' sign and rest at a hotel near SLU. Here are a few options where you can tuck yourself in after your flight from DCA to Castries:

Best time to go to Castries

  • July is the busiest month for flights from Ronald Reagan National Airport to Castries. To steer clear of the crowds, visit Castries in May when things are quieter.

  • Book your flight from Ronald Reagan National Airport to Castries for September to visit the city during its warmest month. You can expect temperatures to range from 26ºC to 30ºC.

  • If you want cooler conditions, search for a cheap flight from DCA to Castries in February when temperatures average between 24ºC and 28ºC.

More about Castries

  • Start your Castries trip off on the right foot by choosing the ideal place to stay. As soon as you've booked your flight from Ronald Reagan National Airport to Castries, explore our range of hotels including:

  • There are so many things to do and see in this city it can be difficult to know where to begin. Derek Walcott Square, Morne Fortune and Immaculate Conception Church are major attractions which should feature on any good Castries itinerary.

Complete your Castries trip with a car rental

  • Pick one of our car rentals in Castries and see the sights on your own terms. Easily compare options in one go to find the ideal ride once you've locked in your hotel and cheap flights from Ronald Reagan National Airport to Castries.

Plan the rest of your trip from Washington D.C. to Castries

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.