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C$270 Cheap Flights from Washington D.C. (WASA) to Castries (SLUA)

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Flight deals from Washington D.C. to Castries

Looking for a cheap last-minute deal or the best return flight from Washington D.C. to Castries? If you want to travel next month, return fares start from C$711. Find the lowest prices on one-way and return tickets right here.
Castries.C$270 per passenger.Departing Fri., Jul. 3.One-way flight with United.Outbound indirect flight with United, departs from Baltimore Washington International on Fri., Jul. 3, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$270, select.
Castries.C$283 per passenger.Departing Wed., Jun. 3.One-way flight with Delta.Outbound indirect flight with Delta, departs from Baltimore Washington International on Wed., Jun. 3, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$283, select.
Castries.C$359 per passenger.Departing Thu., Oct. 1.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Washington Ronald Reagan on Thu., Oct. 1, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$359, select.
Castries.C$388 per passenger.Departing Wed., Mar. 10.One-way flight with Delta.Outbound indirect flight with Delta, departs from Baltimore Washington International on Wed., Mar. 10, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$388, select.
Castries.C$490 per passenger.Departing Thu., Sep. 3.One-way flight with Delta.Outbound indirect flight with Delta, departs from Baltimore Washington International on Thu., Sep. 3, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$490, select.
Castries.C$519 per passenger.Departing Tue., May 19.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Baltimore Washington International on Tue., May 19, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$519, select.
Castries.C$786 per passenger.Departing Sat., Aug. 1.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Baltimore Washington International on Sat., Aug. 1, arriving in St Lucia Vigie.Price includes taxes and charges.From C$786, select.
Castries.C$861 per passenger.Departing Mon., Jan. 4.One-way flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departs from Washington Dulles on Mon., Jan. 4, arriving in St Lucia Vigie.Price includes taxes and charges.From C$861, select.
Castries.C$1,113 per passenger.Departing Mon., Dec. 21.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Washington Ronald Reagan on Mon., Dec. 21, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$1,113, 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 July.
May
from C$519
Jun.
from C$283
Jul.
from C$270
Aug.
from C$786
Sep.
from C$490
Oct.
from C$359
Nov.
Find prices
Dec.
from C$1,113
Jan.
from C$861
Feb.
Find prices
Mar.
from C$388
Apr.
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 C$536
Search flights

St Lucia Hewanorra

31km from central Castries
Cheapest
from C$270
Search flights

Washington D.C. to Castries: Flight information

The things to know before you go.
Cheapest flight foundC$270
Cheapest month to flyJuly

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 return flight from Washington D.C. to Castries is C$677. 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 C$677.
As of May 2026, there are no flights flying from Washington D.C. to Castries.
The cheapest month to fly from Washington D.C. to Castries is usually August.
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 centre of Castries. We've found flights into this airport from C$677.
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, August 27, 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 May, 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.
The cheapest airline that flies to Castries is Delta .

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

  • When looking for a flight from Washington DC to Castries, there's a nice range of airports you can jet off from. Ronald Reagan National Airport (DCA), Washington Dulles International Airport (IAD) and Baltimore/Wash International Thurgood Marshall Airport (BWI) are among Washington DC's main terminals.

  • Hewanorra Airport (UVF) and George F. L. Charles Airport (SLU) are Castries's primary hubs.

  • For a smooth journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This ensures you have enough time to board your flight from Washington DC to Castries.

  • During popular months such as July, it's best to get to the airport even earlier. Arrive two hours before a domestic departure and four hours ahead of international flights when you fly during high season in general.

  • If you have a passport from United States and are travelling to Saint Lucia for tourism purposes, you won't need a visa. However, entry and visa requirements may differ based on the reason for your trip and can be subject to change. For the most up-to-date information, contact your destination's nearest embassy or consulate before reserving a cheap flight from Washington DC to Castries.

Flying from Washington DC

Ronald Reagan National Airport (DCA)

  • We make it a piece of cake to plan a flight from Washington DC to Castries that includes a stopover. To see all the options departing from Ronald Reagan National Airport, uncheck 'Direct flights only.' Then, simply select a flight offering a stop long enough to see the sights of your chosen city. Top stopovers include:

    • John F. Kennedy International Airport (JFK)

    • Newark Liberty International Airport (EWR)

    • Hartsfield-Jackson Atlanta International Airport (ATL)

  • The journey from central Washington DC to DCA takes around 43 minutes on public transport. If you ride-share, drive or grab a cab, you'll cover the 8 kilometres in 16 minutes or so, depending on traffic conditions.

  • Searching for a handy hotel close to Ronald Reagan National Airport? If you've booked an early flight from Washington DC to Castries, these accommodation options will put you moments from your departure lounge:

Washington Dulles International Airport (IAD)

  • Make the most of your vacation with a stopover on your flight from Washington DC to Castries. Visit friends or family or tick a new city off your bucket list. Whatever you want to do, check out these options between Ronald Reagan National Airport and Castries:

    • John F. Kennedy International Airport (JFK)

    • Newark Liberty International Airport (EWR)

    • Hartsfield-Jackson Atlanta International Airport (ATL)

  • On public transport, you can travel from central Washington DC to IAD in around 3 hours and 26 minutes. The terminal is roughly 56 kilometres away, and getting there by car takes approximately 51 minutes.

  • It's your vacation, so why not book an extra night away from home? Consider checking in to one of these accommodation options near Washington Dulles International Airport the day before your flight from Washington DC to Castries:

Arriving in Castries

Hewanorra Airport (UVF)

  • Hewanorra Airport (UVF) to central Castries is approximately 56 kilometres. It takes around 1 hour and 9 minutes to reach the centre driving.

  • The last thing you need is a long journey to your hotel if you're arriving on a late flight from Washington DC to Castries. Book one of these accommodation options near UVF instead:

George F. L. Charles Airport (SLU)

  • After your flight from Washington DC to Castries has hit the tarmac, you can make your way to the city centre in around 6 minutes by car. Central Castries is approximately 3 kilometres from George F. L. Charles Airport (SLU).

  • You can also travel using public transport, which typically takes 40 minutes.

  • After your flight from Washington DC to Castries, tuck yourself in at a hotel close to SLU. These are some comfortable options that'll help you switch to relaxation mode:

How to find the cheapest flights from Washington DC to Castries

  • Right now, C$270 is the lowest price we've found for a one-way ticket from Washington DC to Castries. The cheapest price for a return flight is C$677. Keep in mind fares can change due to demand at the time of booking.

  • Don't wait until the last moment. You're more likely to find cheap flights from Washington DC to Castries if you book ahead. Airlines often offer some great early bird rates.

  • If you can be flexible with your trip dates, try using the 'Whole month' tool. It'll find the cheapest price in every month when searching for your ticket from Washington DC to Castries.

  • Locking in a cheap ticket from Washington DC to Castries couldn't be easier with Price Alerts. Simply create one of these automatic alerts and we'll get in touch as soon as the price has fallen.

  • Play around with filters to find your ideal trip. To see the 'Cheapest,' 'Fastest' or 'Best' flights from Washington DC to Castries, use the 'Sort by' tool. You can also filter results by airline, arrival and departure times, and number of stops.

Best time to go to Castries

  • July is the most popular month for flights from Washington DC to Castries. To escape the crowds, visit Castries in May.

  • Lock in your flight from Washington DC to Castries for September if you want to experience the city during its warmest month. Expect temperatures in Castries to range from 26ºC to 30ºC.

  • Look for cheap flights from Washington DC to Castries in February if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between 24ºC and 28ºC on average.

More about Castries

  • After booking your flight from Washington DC to Castries, think about where you'll stay in this city. Make one of these accommodation options your base for exploring Castries:

  • All great journeys should include a little sightseeing. Derek Walcott Square, Morne Fortune and Immaculate Conception Church are must-visits when exploring Castries.

Complete your Castries trip with a car rental

  • Browse our lineup of car rentals once you've locked in your hotel and cheap flight from Washington DC to Castries. Whether you're searching for an SUV, a compact ride or even something that'll turn heads, you can compare companies in one go to find the best deal.

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.