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Cheap Flights from Washington, D.C. to Castries

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Flight deals from Washington, D.C. to Castries

Looking for a cheap last-minute deal or the best round-trip flight from Washington, D.C. to Castries? If you want to travel next month, round-trip fares start from AED 1,756. Find the lowest prices on one-way and round-trip tickets right here.
Castries.AED 1,421 per passenger.Departing Thu, Jun 4, returning Tue, Jun 9.Round-trip flight with Air Canada.Outbound indirect flight with Air Canada, departing from Washington Ronald Reagan on Thu, Jun 4, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departing from St Lucia Hewanorra on Tue, Jun 9, arriving in Washington Ronald Reagan.Price includes taxes and charges.From AED 1,421, select.
Castries.AED 1,421 per passenger.Departing Thu, May 28, returning Tue, Jun 2.Round-trip flight with Air Canada.Outbound indirect flight with Air Canada, departing from Washington Ronald Reagan on Thu, May 28, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departing from St Lucia Hewanorra on Tue, Jun 2, arriving in Washington Ronald Reagan.Price includes taxes and charges.From AED 1,421, select.
Castries.AED 1,528 per passenger.Departing Thu, Aug 13, returning Wed, Aug 19.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Baltimore Washington International on Thu, Aug 13, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departing from St Lucia Hewanorra on Wed, Aug 19, arriving in Baltimore Washington International.Price includes taxes and charges.From AED 1,528, select.
Castries.AED 1,535 per passenger.Departing Wed, Aug 26, returning Wed, Sep 2.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Baltimore Washington International on Wed, Aug 26, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departing from St Lucia Hewanorra on Wed, Sep 2, arriving in Baltimore Washington International.Price includes taxes and charges.From AED 1,535, select.
Castries.AED 1,756 per passenger.Departing Wed, Apr 1, returning Tue, Apr 7.Round-trip flight with Air Canada and jetBlue.Outbound indirect flight with Air Canada, departing from Washington Ronald Reagan on Wed, Apr 1, arriving in St Lucia Hewanorra.Inbound indirect flight with jetBlue, departing from St Lucia Hewanorra on Tue, Apr 7, arriving in Washington Ronald Reagan.Price includes taxes and charges.From AED 1,756, select.
Castries.AED 1,778 per passenger.Departing Mon, May 11, returning Fri, May 15.Round-trip flight with Air Canada.Outbound indirect flight with Air Canada, departing from Washington Ronald Reagan on Mon, May 11, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departing from St Lucia Hewanorra on Fri, May 15, arriving in Washington Ronald Reagan.Price includes taxes and charges.From AED 1,778, select.
Castries.AED 2,006 per passenger.Departing Wed, Mar 25, returning Tue, Mar 31.Round-trip flight with Air Canada and jetBlue.Outbound indirect flight with Air Canada, departing from Washington Ronald Reagan on Wed, Mar 25, arriving in St Lucia Hewanorra.Inbound indirect flight with jetBlue, departing from St Lucia Hewanorra on Tue, Mar 31, arriving in Washington Ronald Reagan.Price includes taxes and charges.From AED 2,006, select.
Castries.AED 2,039 per passenger.Departing Wed, Oct 21, returning Wed, Oct 28.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Baltimore Washington International on Wed, Oct 21, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departing from St Lucia Hewanorra on Wed, Oct 28, arriving in Baltimore Washington International.Price includes taxes and charges.From AED 2,039, select.
Castries.AED 2,197 per passenger.Departing Mon, Mar 16, returning Mon, Apr 6.Round-trip flight with Air Canada.Outbound indirect flight with Air Canada, departing from Washington Dulles on Mon, Mar 16, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departing from St Lucia Hewanorra on Mon, Apr 6, arriving in Washington Ronald Reagan.Price includes taxes and charges.From AED 2,197, select.
Castries.AED 2,400 per passenger.Departing Wed, Jun 24, returning Wed, Jul 1.Round-trip flight with Air Canada and jetBlue.Outbound indirect flight with Air Canada, departing from Washington Dulles on Wed, Jun 24, arriving in St Lucia Hewanorra.Inbound indirect flight with jetBlue, departing from St Lucia Hewanorra on Wed, Jul 1, arriving in Washington Ronald Reagan.Price includes taxes and charges.From AED 2,400, select.
Castries.AED 2,542 per passenger.Departing Wed, Sep 23, returning Wed, Sep 30.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Baltimore Washington International on Wed, Sep 23, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departing from St Lucia Hewanorra on Wed, Sep 30, arriving in Baltimore Washington International.Price includes taxes and charges.From AED 2,542, select.
Castries.AED 2,615 per passenger.Departing Wed, Jul 29, returning Mon, Aug 3.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Baltimore Washington International on Wed, Jul 29, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departing from St Lucia Hewanorra on Mon, Aug 3, arriving in Baltimore Washington International.Price includes taxes and charges.From AED 2,615, select.
Castries.AED 2,689 per passenger.Departing Mon, Jul 20, returning Fri, Jul 24.Round-trip flight with Air Canada.Outbound indirect flight with Air Canada, departing from Washington Dulles on Mon, Jul 20, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departing from St Lucia Hewanorra on Fri, Jul 24, arriving in Washington Dulles.Price includes taxes and charges.From AED 2,689, select.
Castries.AED 2,726 per passenger.Departing Wed, Apr 29, returning Sun, May 3.Round-trip flight with Air Canada and jetBlue.Outbound indirect flight with Air Canada, departing from Washington Ronald Reagan on Wed, Apr 29, arriving in St Lucia Hewanorra.Inbound indirect flight with jetBlue, departing from St Lucia Hewanorra on Sun, May 3, arriving in Washington Ronald Reagan.Price includes taxes and charges.From AED 2,726, select.
Castries.AED 3,034 per passenger.Departing Thu, Oct 29, returning Mon, Nov 2.Round-trip flight with Air Canada.Outbound indirect flight with Air Canada, departing from Washington Ronald Reagan on Thu, Oct 29, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departing from St Lucia Hewanorra on Mon, Nov 2, arriving in Washington Ronald Reagan.Price includes taxes and charges.From AED 3,034, select.
Castries.AED 3,101 per passenger.Departing Thu, Dec 3, returning Mon, Dec 7.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Baltimore Washington International on Thu, Dec 3, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departing from St Lucia Hewanorra on Mon, Dec 7, arriving in Washington Dulles.Price includes taxes and charges.From AED 3,101, select.

Find the cheapest month to fly from Washington, D.C. to Castries

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington, D.C. to Castries flights are currently cheapest in June.
Mar
from AED 2,006
Apr
from AED 1,756
May
from AED 1,778
Jun
from AED 1,421
Jul
from AED 2,689
Aug
from AED 1,528
Sep
from AED 2,542
Oct
from AED 2,039
Nov
from AED 3,328
Dec
from AED 3,101
Jan
from AED 3,373
Feb
Find prices

Alternative Washington, D.C. to Castries routes

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

St Lucia Vigie

1km from central Castries
Closest
from AED 2,403
Search flights

St Lucia Hewanorra

31km from central Castries
Cheapest
from AED 1,421
Search flights

Washington, D.C. to Castries: Flight information

The things to know before you go.
Cheapest flight foundAED 1,421
Cheapest month to flyMay

Finding cheap flights from Washington, D.C. 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 round-trip flight from Washington, D.C. to Castries is AED 1,421. 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, D.C. to Castries. But we found flights with one or more stops from AED 1,421.
There are no flights flying from Washington, D.C. to Castries, as of March 2026.
The cheapest month to fly from Washington, D.C. to Castries is usually May.
If you're flying from Washington, D.C., the cheapest airport near Castries is St Lucia Hewanorra – which is 30.5 km away from the center of Castries. We've found flights to this airport from AED 1,421.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Washington, D.C. to Castries on Thursday, May 28, 2026.
No airlines currently offer direct flights between Washington, D.C. 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 March, the average temperature is usually around 26°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.
The cheapest airline that flies to Castries is Air Canada.

Flying from Washington DC to Castries: what you need to know

  • Organizing your flight from Washington DC to Castries begins with finding the most convenient airport to start your vacation. Ronald Reagan National Airport (DCA), Washington Dulles International Airport (IAD) and Baltimore/Wash International Thurgood Marshall Airport (BWI) are the main departure points in Washington DC.

  • Touch down in Castries at George F. L. Charles Airport (SLU) or Hewanorra Airport (UVF).

  • Washington DC and Castries follow the same timezone, UTC-4.

  • To ensure you board your Washington DC to Castries flight, allow plenty of time to check in and drop off your luggage. Turning up two hours before international departures and one hour before domestic flights is a good rule of thumb.

  • Flying during a peak month like July? School holidays and other popular seasons can mean longer lines at security. Play things extra safe and arrive up to four hours ahead of international flights and two hours before domestic departures.

How to find the cheapest flights from Washington DC to Castries

  • To find cheap Washington DC to Castries flights, book as early as you can. Airlines typically offer lower prices when tickets are first released.

  • The 'Whole month' search tool will show you the cheapest plane tickets from Washington DC to Castries throughout the month. It's a great way to find a bargain if your plans are flexible.

  • You don't need to check back in every day to find out if prices have dropped when you set up a Price Alert. We'll let you know as soon as a better deal comes up on cheap flights from Washington DC to Castries.

  • Find an affordable Washington DC to Castries flight with the help of our filters. Choose your ideal departure time, duration and airlines, then sort the results by 'Cheapest' to see the best deals.

Flying from Washington DC

Ronald Reagan National Airport (DCA)

  • We make it easy to find a Washington DC to Castries flight with a stopover. To see all the options departing from Ronald Reagan National Airport, uncheck 'Direct flights only.' Then, select a flight with a stop long enough to see the sights of your chosen city. Some popular stopovers include:

    • Hartsfield-Jackson Atlanta International Airport (ATL)

    • John F. Kennedy International Airport (JFK)

    • Newark Liberty International Airport (EWR)

  • DCA is around 6 kilometers from central Washington DC. If you're catching a cab, driving or ride-sharing from the center, it'll take 15 minutes or so to get there, depending on traffic. If you're taking public transport, expect the trip time to be around 45 minutes.

  • In search of a convenient hotel near Ronald Reagan National Airport? If you're boarding an early flight from Washington DC to Castries, these accommodation options will have you moments from check-in:

  • 76.44% of flights that take off from Ronald Reagan National Airport make it to their destination on time.

  • You'll find DCA at 1 Aviation Circle.

Washington Dulles International Airport (IAD)

  • Split up your Washington DC to Castries flight with a stop so you can stretch your legs or cross a new place off your list. Some popular stopovers between Washington Dulles International Airport and Castries include:

    • Hartsfield-Jackson Atlanta International Airport (ATL)

    • Newark Liberty International Airport (EWR)

    • Pearson International Airport (YYZ)

  • On public transport, you can travel from central Washington DC to IAD in around 1 hour 10 minutes. The airport is roughly 40 kilometers away. Driving will take you about 50 minutes.

  • Want to enjoy an extra night away before your flight from Washington DC to Castries? Kick back in a hotel near Washington Dulles International Airport before your trip officially starts. Here's where you can stay:

  • Washington Dulles International Airport has an on-time performance of 74%. This figure provides insight into how frequently flights that take off from this airport land at their destination on schedule.

  • IAD is located at 1 Saarinen Circle.

Baltimore/Wash International Thurgood Marshall Airport (BWI)

  • Lock in a ticket from Washington DC to Castries departing from Baltimore/Wash International Thurgood Marshall Airport (BWI) with a stop or two. Popular stopovers between BWI and Castries are:

    • Hartsfield-Jackson Atlanta International Airport (ATL)

    • John F. Kennedy International Airport (JFK)

    • Miami International Airport (MIA)

  • From central Washington DC, BWI is around 40 kilometers away. It'll take you roughly 50 minutes to arrive by car and 1 hour 30 minutes or so if you use public transport.

  • Set yourself up for a smooth departure — stay near Baltimore/Wash International Thurgood Marshall Airport and know you'll make it to your boarding gate with time to spare. Check in to one of these hotels the day before if you've booked an early Washington DC to Castries flight:

  • Airports have an on-time performance rating that measures how often flights arrive without delays. At BWI, that rate is 77.13%.

Arriving in Castries

George F. L. Charles Airport (SLU)

  • George F. L. Charles Airport (SLU) to central Castries takes around 5 minutes by car. The center is roughly 2 kilometers away.

  • If you're traveling on public transport, expect a journey time of around 40 minutes.

  • The last thing you want is a long journey to your hotel if you're getting in late on a flight from Washington DC to Castries. Reserve one of these accommodation options near SLU instead:

  • Say yes to new adventures by picking up a George F. L. Charles Airport rental car. Grab a set of wheels from Drive A Matic, Final Rentals or Sixt and explore beyond Castries's usual tourist stops.

  • Get the best deal by booking your ride from George F. L. Charles Airport around one week ahead of your trip.

Hewanorra Airport (UVF)

  • Hewanorra Airport (UVF) is around 31 kilometers from central Castries. Following your flight from Washington DC to Castries, it'll take you approximately 1 hour 10 minutes to reach the heart of the city in a ride-share or cab.

  • Place the 'Do not disturb' sign on your door and relax at a hotel close to UVF. Here are a few options where you can settle in after your flight from Washington DC to Castries:

  • No need to worry about public transport schedules or cab lines. Pick up a Hewanorra Airport rental car and take your trip in whatever direction you choose. Compare rates and availability from Drive A Matic, Sixt and Final Rentals.

  • Lock in the best price by reserving your ride from UVF one week ahead of time. You can also expect to have a bigger selection of vehicles.

Best time to go to Castries

  • February is the quietest month for flights from Washington DC to Castries, while June is the busiest. Find the best time to visit Castries based on whether you like a lively atmosphere or a more laid-back vibe.

  • Lock in a Washington DC to Castries ticket departing in September if you want to visit the city during its warmest month. Expect temperatures in Castries to range from 26ºC (79ºF) to 30ºC (86ºF).

  • February has average temperatures of between 24ºC (75ºF) and 28ºC (82ºF). Search for cheap flights from Washington DC to Castries around that time if you'd rather travel in cooler conditions.

More about Castries

  • Once you've booked your flight from Washington DC to Castries, find a hotel that offers the right mix of comfort and location. Make one of these options your base for exploring Castries:

  • Derek Walcott Square and Morne Fortune are just the start of the popular attractions to put on your Castries itinerary. Continue your sightseeing adventures at Immaculate Conception Church.

Explore more of Saint Lucia

  • Vieux Fort is just one of the many cities in Saint Lucia waiting to be discovered once you've seen Castries. Around 32 kilometers to the south, its top attractions include Maria Islands Museum, Anse Des Sables Beach and YoungFaith Park.

  • Any journey through Saint Lucia isn't complete without visiting Micoud. Josephine Splash Park and Ti Rocher Community Park are highlights in this well-known destination, which is about 24 kilometers south-east of 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.