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Flight tickets from Washington Dulles to Castries

Compare Washington Dulles to Castries flight deals

Find the cheapest month or even day of the year to fly to Castries

Book the best Castries fare with no extra fees

Flight deals from Washington Dulles to Castries

Looking for a cheap last-minute deal or the best return flight from Washington Dulles Airport to Castries? If you want to travel next month, return fares start from ₹ 51,876. Find the lowest prices on one-way and return tickets right here.
Castries.₹ 29,018 per passenger.Departing Tue, 1 Sep.One-way flight with Delta.Outbound indirect flight with Delta, departs from Washington Dulles on Tue, 1 Sep, arriving in St Lucia Hewanorra.Price includes taxes and charges.From ₹ 29,018, select.
Castries.₹ 29,137 per passenger.Departing Wed, 19 Aug.One-way flight with Delta.Outbound indirect flight with Delta, departs from Washington Dulles on Wed, 19 Aug, arriving in St Lucia Hewanorra.Price includes taxes and charges.From ₹ 29,137, select.
Castries.₹ 30,372 per passenger.Departing Thu, 22 Oct.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Washington Dulles on Thu, 22 Oct, arriving in St Lucia Hewanorra.Price includes taxes and charges.From ₹ 30,372, select.
Castries.₹ 31,373 per passenger.Departing Fri, 3 Jul.One-way flight with United.Outbound indirect flight with United, departs from Washington Dulles on Fri, 3 Jul, arriving in St Lucia Hewanorra.Price includes taxes and charges.From ₹ 31,373, select.
Castries.₹ 33,502 per passenger.Departing Sun, 8 Nov.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Washington Dulles on Sun, 8 Nov, arriving in St Lucia Hewanorra.Price includes taxes and charges.From ₹ 33,502, select.
Castries.₹ 40,162 per passenger.Departing Thu, 18 Jun.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Washington Dulles on Thu, 18 Jun, arriving in St Lucia Hewanorra.Price includes taxes and charges.From ₹ 40,162, select.
Castries.₹ 53,732 per passenger.Departing Thu, 10 Dec.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Washington Dulles on Thu, 10 Dec, arriving in St Lucia Hewanorra.Price includes taxes and charges.From ₹ 53,732, select.

Find the cheapest month to fly from Washington Dulles to Castries

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Dulles to Castries flights are currently cheapest in September.
Jun
from ₹ 40,162
Jul
from ₹ 31,373
Aug
from ₹ 29,137
Sep
from ₹ 29,018
Oct
from ₹ 30,372
Nov
from ₹ 33,502
Dec
from ₹ 53,732
Jan
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Feb
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Mar
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Apr
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May
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Alternative Washington Dulles to Castries routes

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

St Lucia Vigie

1km from central Castries
Closest
from ₹ 45,857
Search flights

St Lucia Hewanorra

31km from central Castries
Cheapest
from ₹ 29,018
Search flights

Washington D.C. to Castries: Flight information

The things to know before you go.
Cheapest flight found₹ 29,018
Cheapest month to flySeptember

Finding cheap flights from Washington Dulles 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 Dulles to Castries is ₹ 51,876. 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 Dulles to Castries. But we found flights with one or more stops from ₹ 51,876.
As of June 2026, there are no flights flying from Washington Dulles to Castries.
The cheapest month to fly from Washington Dulles to Castries is usually July.
If you're flying from Washington Dulles 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 ₹ 51,876.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Dulles Airport to Castries on Monday, 13 July 2026.
No airlines currently offer direct flights between Washington Dulles 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 June, the average temperature is usually around 28°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.

Flying from Washington Dulles International Airport (IAD) to Castries: what you need to know

  • Castries is one hour ahead of Washington DC, where Washington Dulles International Airport is located. Castries runs on the UTC-4 timezone.

  • Give yourself enough time to catch your IAD to Castries flight. Generally, it's best to arrive two hours before international departures and an hour ahead for domestic flights.

  • You can expect bigger queues in popular months like June. Arriving up to four hours in advance for international flights and two hours for a domestic departure will give you plenty of time for security and boarding.

  • A stopover is the ideal opportunity to take a break from travelling and possibly even visit a new city. When searching for plane tickets from IAD to Castries, uncheck the 'Direct flights only' box to see where you can visit along the way. Some popular options include:

    • Atlanta Hartsfield-Jackson International Airport (ATL)

    • Newark Liberty International Airport (EWR)

    • Toronto Pearson International Airport (YYZ)

  • IAD is about 40 kilometres from central Washington DC. If you're driving, catching a taxi or ride-sharing from the centre, it'll take you 45 minutes or so to get there, depending on traffic conditions. If you're planning to take public transport, expect the trip time to be around 1 hour 10 minutes.

  • Looking for a hotel near IAD? If you're boarding an early flight from Washington Dulles International Airport to Castries, these accommodation options will put you moments from check-in:

  • Of the flights that depart from Washington Dulles International Airport, 77% land on time at their destination.

  • IAD's address is 1 Saarinen Circle.

How to find the cheapest flights from Washington Dulles International Airport (IAD) to Castries

  • ₹ 29,018 is currently the lowest price for a one-way Washington Dulles International Airport to Castries flight. A return plane ticket starts from ₹ 51,876. These fares may change depending on demand.

  • Don't leave things to the last moment. You're more likely to pick up cheap flights from IAD to Castries if you book in advance. Airlines often offer some excellent early bird rates.

  • Finding cheap tickets from Washington Dulles International Airport to Castries is easier if you can be flexible with your travel dates. Use the 'Whole month' function to access the lowest fares across each month and snap up a sweet deal.

  • There's no need to keep checking in to see if fares have dropped when you set up a Price Alert. We'll notify you the moment there's an even bigger deal on cheap flights from IAD to Castries.

  • Pick your preferred departure and arrival times, number of stops and airlines with our filters. Then, sort the results for your flight from Washington Dulles International Airport to Castries by 'Fastest,' 'Best' or 'Cheapest.'

Airports in Castries

St Lucia Hewnorra International Airport (UVF)

  • St Lucia Hewnorra International Airport (UVF) to the centre of Castries takes about 1 hour 30 minutes to reach by car. The centre is roughly 72 kilometres away.

  • Getting there on public transport takes around 2 hours.

  • If you're coming in on a late flight from Washington Dulles International Airport to Castries, nothing beats the convenience of staying near the terminal. Grab your luggage from the carousel and then be showered and sleeping not long after at one of these accommodation options near UVF:

  • Reserving your ride from St Lucia Hewnorra International Airport around one week in advance of your flight from IAD to Castries can help you get the best possible rate.

Castries George F. L. Charles Airport (SLU)

  • Once your flight from Washington Dulles International Airport to Castries has arrived, you can reach the city centre in about 10 minutes by car. Central Castries is roughly 3 kilometres from Castries George F. L. Charles Airport (SLU).

  • If you choose to travel on public transport, you'll reach the centre in 15 minutes or so.

  • There are some comfortable places to park your luggage (and yourself) near SLU. Settle in and get cosy after your IAD to Castries flight at one of these well-located options:

  • Secure your first choice, not your last resort. Reserving your ride from SLU one week in advance often means better deals and a wider choice of vehicles.

Best time to go to Castries

  • February is the busiest month for flights from Washington Dulles International Airport to Castries. To steer clear of the crowds, plan your trip to Castries in September.

  • The warmest month in Castries is September, with temperatures ranging between 26ºC and 30ºC. Lock in your Washington Dulles International Airport to Castries plane ticket then if that's your ideal forecast.

  • If you want to travel in cooler conditions, look for a cheap ticket from IAD to Castries in February when temperatures average between 24ºC and 28ºC.

More about Castries

  • After booking your flight from Washington Dulles International Airport to Castries, find a hotel that offers the right mix of comfort and location. Make one of these options your base for exploring Castries:

  • Malabar Beach and Vigie Beach are a couple of top attractions to add to your Castries must-do list. Keep the adventure rolling by checking out Morne Fortune.

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 12 days.