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Cheap Flights from London (LOND) to Castries (SLUA)

Compare London 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 London to Castries

Looking for a cheap last-minute deal or the best return flight from London to Castries? Find the lowest prices on one-way and return tickets right here.
Castries.$1,065 per passenger.Departing Tue, 17 Mar, returning Tue, 31 Mar.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Tue, 17 Mar, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Tue, 31 Mar, arriving in London Heathrow.Price includes taxes and charges.From $1,065, select.
Castries.$1,078 per passenger.Departing Tue, 20 Jan, returning Fri, 30 Jan.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Tue, 20 Jan, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Fri, 30 Jan, arriving in London Heathrow.Price includes taxes and charges.From $1,078, select.
Castries.$1,098 per passenger.Departing Tue, 3 Feb, returning Mon, 9 Feb.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Tue, 3 Feb, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Mon, 9 Feb, arriving in London Heathrow.Price includes taxes and charges.From $1,098, select.
Castries.$1,101 per passenger.Departing Tue, 9 Dec, returning Wed, 21 Jan.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Tue, 9 Dec, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Wed, 21 Jan, arriving in London Heathrow.Price includes taxes and charges.From $1,101, select.
Castries.$1,102 per passenger.Departing Wed, 5 Nov, returning Sun, 9 Nov.Return flight with British Airways.Outbound direct flight with British Airways departs from London Gatwick on Wed, 5 Nov, arriving in St Lucia Hewanorra.Inbound direct flight with British Airways departs from St Lucia Hewanorra on Sun, 9 Nov, arriving in London Gatwick.Price includes taxes and charges.From $1,102, select.
Castries.$1,102 per passenger.Departing Sun, 14 Sep, returning Sun, 14 Sep.Return flight with British Airways.Outbound direct flight with British Airways departs from London Gatwick on Sun, 14 Sep, arriving in St Lucia Hewanorra.Inbound direct flight with British Airways departs from St Lucia Hewanorra on Sun, 14 Sep, arriving in London Gatwick.Price includes taxes and charges.From $1,102, select.
Castries.$1,102 per passenger.Departing Tue, 17 Feb, returning Mon, 2 Mar.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Tue, 17 Feb, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Mon, 2 Mar, arriving in London Heathrow.Price includes taxes and charges.From $1,102, select.
Castries.$1,103 per passenger.Departing Thu, 29 Jan, returning Fri, 6 Feb.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Thu, 29 Jan, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Fri, 6 Feb, arriving in London Heathrow.Price includes taxes and charges.From $1,103, select.

Find the cheapest month to fly from London to Castries

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London to Castries flights are currently cheapest in March.
Jul
from $2,093
Aug
from $1,471
Sep
from $1,102
Oct
from $1,105
Nov
from $1,102
Dec
from $1,128
Jan
from $1,078
Feb
from $1,098
Mar
from $1,065
Apr
from $1,132
May
from $1,127
Jun
from $1,130

Direct flights from London to Castries

Alternative London to Castries routes

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

London to Castries: Flight information

The things to know before you go.
Cheapest flight found$1,065
Cheapest month to flyMarch
Average flight time8 hrs, 57 mins
Most popular airlineQatar Airways
Average flights per week15

Finding cheap flights from London 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 London to Castries is $1,064. 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.
8 hours and 57 minutes is the average flight time from London to Castries.
Qatar Airways and British Airways fly direct from London to Castries.
As of July 2025, there are 15 flights per week flying from London to Castries.
The cheapest month to fly from London to Castries is usually March.
If you're flying from London, 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 $1,064.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from London to Castries on Tuesday, 17 March 2026.
Yes – the average flight time is 8 hours and 57 minutes.
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 July, 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.
The cheapest airline that flies to Castries is Air Canada. And the cheapest airline that flies to St Lucia Hewanorra Airport is British Airways.

Flying from London to Castries: what you need to know

  • You can select from a range of airports when organising a flight from London to Castries. Explore your options for jetting out of London from London Heathrow Airport (LHR), London Gatwick Airport (LGW) or Stansted Airport (STN). London Luton Airport (LTN) and London City Airport (LCY) also service London.

  • Step off your plane in Castries at George F. L. Charles Airport (SLU) or Hewanorra Airport (UVF).

  • Around 9 hours is how long you'll be in transit on a direct London to Castries flight.

  • Castries's timezone is UTC-4, making Castries four hours behind London.

  • To ensure you make your London to Castries flight, allow plenty of time to check in and drop off your luggage. Arriving two hours before international departures and an hour before domestic flights is the standard rule.

  • You'll likely experience longer lines in popular months such as July. Arriving up to four hours in advance for international flights and two hours for domestic departures is a wise move.

How to find the cheapest flights from London to Castries

  • Book two months before you want to fly. Research into pricing trends suggests this is the ideal window for finding cheap London to Castries flights.

  • The best month for picking up cheap plane tickets from London to Castries is May. Use the 'Whole month' tool to compare flight prices, then select the dates that offer the lowest fares.

  • There's no need to check back in every day to see if fares have dropped when you create a Price Alert. We'll let you know as soon as a better deal comes up on cheap flights from London to Castries.

  • Lock in a cheap London to Castries flight with the help of our filters. Select your preferred times, number of stops and airlines, then sort the results by 'Cheapest' to see the best deals.

Flying from London

London Heathrow Airport (LHR)

  • You can catch a direct flight from London to Castries leaving from London Heathrow Airport (LHR). Begin your journey at LHR and come in for landing at Hewanorra Airport (UVF).

  • Virgin Atlantic is a well-known carrier that offers direct London to Castries plane tickets from LHR.

  • Stopovers are the perfect opportunity to break up your journey — and perhaps even visit a new city. When searching for London to Castries flights departing from London Heathrow Airport, uncheck the 'Direct flights only' box to see where you can stop along the way. Top options include:

    • Grantley Adams International Airport (BGI)

    • John F. Kennedy International Airport (JFK)

    • Hartsfield-Jackson Atlanta International Airport (ATL)

  • Located around 26 kilometres from the centre of London, LHR can be reached in about 55 minutes by car, depending on traffic. The journey by public transport is roughly 1 hour.

  • Want a stress-free start to your break? Stay near London Heathrow Airport. Whether you're catching an early flight from London to Castries or want to avoid feeling rushed, these hotels have you covered:

  • 68.18% of flights that leave from London Heathrow Airport land at their destination on time.

London Gatwick Airport (LGW)

  • You can take a direct flight from London to Castries departing from London Gatwick Airport (LGW). Kick off your travels at LGW and touch down at Hewanorra Airport (UVF).

  • From LGW, you can book a direct London to Castries plane ticket with British Airways.

  • Break up your London to Castries flight with a stop at John F. Kennedy International Airport (JFK). One of the main stopovers between London Gatwick Airport and Castries, it's the perfect opportunity to recharge before the next leg of your journey.

  • Using public transport, you can travel from central London to LGW in around 30 minutes. The airport is roughly 40 kilometres away. Driving will take you about 1 hour 20 minutes.

  • Want to treat yourself to an extra night away before your flight from London to Castries? Kick back in a hotel near London Gatwick Airport before your trip officially begins. Stay at one of these accommodation options:

  • When it comes to keeping flights on track, London Gatwick Airport has an on-time arrival performance of 69.26%.

Stansted Airport (STN)

  • STN is roughly 48 kilometres from central London. Driving from the city centre to the airport takes about 1 hour. If you're planning to use public transport, expect a journey of around 1 hour 25 minutes.

  • Make taking an early London to Castries flight one of the easiest parts of your trip. Stay at one of these hotels near Stansted Airport and get to your boarding gate with plenty of time to spare:

  • Airports have an on-time performance rating that measures how often flights arrive as expected. At STN, that figure is 64.73%.

Arriving in Castries

George F. L. Charles Airport (SLU)

  • The distance from George F. L. Charles Airport (SLU) to central Castries is approximately 2 kilometres. It'll take you around 5 minutes to reach the centre driving.

  • Getting there by public transport takes about 40 minutes.

  • If you're coming in on a late flight from London to Castries, few things beat the convenience of staying close to the terminal. Grab your luggage from the carousel and then be showered and snoozing not long after at one of these accommodation options near SLU:

  • Get on the fast track to adventure 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 experience the lesser-explored corners of Castries and beyond.

  • Lock in the best possible rate by reserving your vehicle from George F. L. Charles Airport about one week ahead of your trip.

Hewanorra Airport (UVF)

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

  • After your flight from London to Castries, tuck yourself in at a hotel near UVF. These are some comfortable accommodation options that'll help you switch to relaxation mode:

  • Drive A Matic, Sixt and Final Rentals make picking up a Hewanorra Airport rental car simple. These trusted companies are located around or in the terminal and will get you on your way in no time.

  • Get the lowest price by securing your ride from UVF one week ahead of time. You can also expect to have a greater range of vehicles.

Best time to go to Castries

  • It's time to choose your dates for your flight from London to Castries. June is the most popular month to travel to Castries. If you want a more relaxed vibe, go in February.

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

  • February sees average temperatures of between 24ºC (75ºF) and 28ºC (82ºF). Look for cheap flights from London to Castries around that time if you like travelling in cooler conditions.

More about Castries

  • When it comes to looking for somewhere to lay your head, you'll find the top stays in Castries right here. Explore these options as soon as you've booked your flight from London to Castries:

  • All great adventures should include some sightseeing. Derek Walcott Square, Morne Fortune and Immaculate Conception Church are essential stops on your Castries itinerary.

Explore more of Saint Lucia

  • You've seen Castries, now it's time to explore more of Saint Lucia. Travel about 32 kilometres south to Vieux Fort to check off its must-visit sights. From Maria Islands Museum to Anse Des Sables Beach and YoungFaith Park, there's plenty to keep you on the go.

  • Any trip through Saint Lucia wouldn't be complete without visiting Micoud. Josephine Splash Park and Ti Rocher Community Park are just a couple of highlights in this well-known destination, which is about 24 kilometres south-east of Castries.

Plan the rest of your trip from London to Castries

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