Skyscanner home

C$246 Cheap Flights from Baltimore Washington International (BWI) to Castries (SLUA)

Compare Baltimore Washington International 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

TrustScore 4.5 out of 5 4.5 out of 5 based on 932 reviews Trustpilot

Flight deals from Baltimore Washington International Airport to Castries

Looking for a cheap last-minute deal or the best return flight from Baltimore Washington International Airport to Castries? If you want to travel next month, return fares start from C$658. Find the lowest prices on one-way and return tickets right here.
Castries.C$246 per passenger.Departing Thu., Aug. 13.One-way flight with Delta.Outbound indirect flight with Delta, departs from Baltimore Washington International on Thu., Aug. 13, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$246, select.
Castries.C$259 per passenger.Departing Wed., Jul. 29.One-way flight with Delta.Outbound indirect flight with Delta, departs from Baltimore Washington International on Wed., Jul. 29, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$259, select.
Castries.C$407 per passenger.Departing Sat., Apr. 11.One-way flight with Delta.Outbound indirect flight with Delta, departs from Baltimore Washington International on Sat., Apr. 11, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$407, select.
Castries.C$407 per passenger.Departing Wed., Nov. 11.One-way flight with Delta.Outbound indirect flight with Delta, departs from Baltimore Washington International on Wed., Nov. 11, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$407, select.
Castries.C$440 per passenger.Departing Thu., Jun. 4.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Baltimore Washington International on Thu., Jun. 4, arriving in St Lucia Vigie.Price includes taxes and charges.From C$440, select.
Castries.C$465 per passenger.Departing Fri., May 29.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Baltimore Washington International on Fri., May 29, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$465, select.
Castries.C$555 per passenger.Departing Wed., Oct. 7.One-way flight with Delta.Outbound indirect flight with Delta, departs from Baltimore Washington International on Wed., Oct. 7, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$555, select.
Castries.C$741 per passenger.Departing Mon., Mar. 30.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Baltimore Washington International on Mon., Mar. 30, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$741, select.
Castries.C$1,533 per passenger.Departing Tue., Dec. 22.One-way flight with Delta.Outbound indirect flight with Delta, departs from Baltimore Washington International on Tue., Dec. 22, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$1,533, select.

Find the cheapest month to fly from Baltimore Washington International to Castries

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Baltimore Washington International to Castries flights are currently cheapest in August.
Mar.
from C$741
Apr.
from C$407
May
from C$465
Jun.
from C$440
Jul.
from C$259
Aug.
from C$246
Sep.
Find prices
Oct.
from C$555
Nov.
from C$407
Dec.
from C$1,533
Jan.
Find prices
Feb.
Find prices

Alternative Baltimore Washington International to Castries routes

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

St Lucia Vigie

1km from central Castries
Closest
from C$440
Search flights

St Lucia Hewanorra

31km from central Castries
Cheapest
from C$246
Search flights

Washington D.C. to Castries: Flight information

The things to know before you go.
Cheapest flight foundC$246
Cheapest month to flyAugust

Finding cheap flights from Baltimore Washington International 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 Baltimore Washington International to Castries is C$658. 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 Baltimore Washington International to Castries. But we found flights with one or more stops from C$658.
As of March 2026, there are no flights flying from Baltimore Washington International to Castries.
The cheapest month to fly from Baltimore Washington International to Castries is usually April.
If you're flying from Baltimore Washington International 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$658.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Baltimore Washington International Airport to Castries on Wednesday, April 15, 2026.
No airlines currently offer direct flights between Baltimore Washington International 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 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.
Currently, Delta offers the cheapest flight tickets to Castries.

Travelling from Baltimore/Wash International Thurgood Marshall Airport (BWI) to Castries: what you need to know

  • Castries and Washington DC (where Baltimore/Wash International Thurgood Marshall Airport is located) share the UTC-4 timezone. That means you won't have to adjust your watch on arrival.

  • Give yourself plenty of time to make your flight from BWI to Castries. As a rule of thumb, arrive two hours before international departures and an hour ahead for domestic flights.

  • Getting away during a peak month like July? Popular seasons (like spring break, summer and New Year) can add another hour at security. Be extra cautious and arrive up to four hours before an international flight and two hours before a domestic departure.

  • We make it easy to plan a flight from BWI to Castries that includes a stopover. To see the options, deselect 'Direct flights only.' Next, select a flight offering a stop long enough to explore your chosen city. Major stopovers include:

    • Hartsfield-Jackson Atlanta International Airport (ATL)

    • Miami International Airport (MIA)

    • John F. Kennedy International Airport (JFK)

  • If you hold a passport from United States and want to travel to Saint Lucia for tourism purposes, you won't need a visa. However, visa and entry requirements may vary based on your length of stay and are subject to change. For the most up-to-date information, check with your destination's nearest embassy or consulate before reserving a cheap ticket from Baltimore/Wash International Thurgood Marshall Airport to Castries.

  • BWI is about 48 kilometres from central Washington DC. If you're catching a cab, ride-sharing or driving from the centre, it'll take you 48 minutes or so to get there, depending on the traffic. If you're using public transport, expect the journey time to be approximately 1 hour and 32 minutes.

  • Need a handy hotel near BWI? If you're catching an early flight from Baltimore/Wash International Thurgood Marshall Airport to Castries, these stays will have you moments from your check-in counter:

How to find the cheapest flights from Baltimore/Wash International Thurgood Marshall Airport (BWI) to Castries

  • C$246 is the lowest price for a one-way ticket from Baltimore/Wash International Thurgood Marshall Airport to Castries. Return flights start at C$658. These fares may change depending on availability and demand.

  • To pick up cheap tickets from BWI to Castries, book ahead. Airlines typically offer their best fares when flights are first made available.

  • Finding cheap tickets from Baltimore/Wash International Thurgood Marshall Airport to Castries is easy if you're flexible with your travel dates. Try using the 'Whole month' search function to see the best prices across each month and snap up a great deal.

  • Create a Price Alert for cheap tickets from BWI to Castries. There's no need to check back in every day to find out if prices have dropped. We'll tell you as soon as the price changes.

  • Play around with the filters to find your ideal journey. To see the 'Cheapest,' 'Fastest' or 'Best' flights from Baltimore/Wash International Thurgood Marshall Airport to Castries, use the 'Sort by' function. You can also filter results by departure and arrival times, airline, and number of stops.

Airports in Castries

Hewanorra Airport (UVF)

  • Hewanorra Airport (UVF) to central Castries is about 1 hour and 9 minutes by car. It's approximately 56 kilometres away.

  • If you have a late flight from Baltimore/Wash International Thurgood Marshall Airport to Castries, nothing beats the convenience of staying close to the terminal. Grab your luggage from the carousel and then be showered and relaxing soon after at one of these accommodation options near UVF:

George F. L. Charles Airport (SLU)

  • Central Castries is located around 3 kilometres from George F. L. Charles Airport (SLU). Once your flight from Baltimore/Wash International Thurgood Marshall Airport to Castries has hit the runway and you've navigated your way to arrivals, the drive should take about 6 minutes.

  • Public transport will get you there in about 40 minutes.

  • After your flight from BWI to Castries, unwind at a hotel near SLU. These are some comfortable accommodation options that'll help you switch to relaxation mode:

Best time to go to Castries

  • July is the busiest month to catch a flight from Baltimore/Wash International Thurgood Marshall Airport to Castries while May is the quietest. To work out the best time to go to Castries, consider the pace you like to travel at.

  • The warmest month in Castries is September, with the temperature ranging between 26ºC and 30ºC. Lock in your flights from Baltimore/Wash International Thurgood Marshall Airport to Castries in this month if you enjoy this type of weather.

  • February sees average temperatures of between 24ºC and 28ºC. Look for cheap flights from BWI to Castries sometime around then if you like travelling in cooler conditions.

More about Castries

  • Start your Castries trip right by choosing the perfect place to stay. After booking your flight from Baltimore/Wash International Thurgood Marshall Airport to Castries, explore our range of hotels including:

  • All great adventures 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

  • We use the same magic that helped you find your cheap flight from Baltimore/Wash International Thurgood Marshall Airport to Castries to track down amazing deals on car rentals. Search for your ride in seconds and compare your options in one place. Plus you'll find all the info on car rentals in Castries, from the most popular rental company to the average daily price.

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.