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Cheap Flights from London Heathrow (LHR) to Castries (SLUA)

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Compare London Heathrow 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 Heathrow to Castries

Looking for a cheap last-minute deal or the best round-trip flight from London Heathrow to Castries? Find the lowest prices on one-way and round-trip tickets right here.
Castries.$442 per passenger.Departing Mon, Sep 15.One-way flight with Vueling Airlines.Outbound indirect flight with Vueling Airlines, departing from London Heathrow on Mon, Sep 15, arriving in St Lucia Hewanorra.Price includes taxes and charges.From $442, select.
Castries.$444 per passenger.Departing Wed, Jun 11.One-way flight with Vueling Airlines.Outbound indirect flight with Vueling Airlines, departing from London Heathrow on Wed, Jun 11, arriving in St Lucia Hewanorra.Price includes taxes and charges.From $444, select.
Castries.$490 per passenger.Departing Tue, May 27.One-way flight with Aegean Airlines.Outbound indirect flight with Aegean Airlines, departing from London Heathrow on Tue, May 27, arriving in St Lucia Hewanorra.Price includes taxes and charges.From $490, select.
Castries.$526 per passenger.Departing Wed, Aug 6.One-way flight with British Airways.Outbound indirect flight with British Airways, departing from London Heathrow on Wed, Aug 6, arriving in St Lucia Hewanorra.Price includes taxes and charges.From $526, select.
Castries.$529 per passenger.Departing Fri, Oct 3.One-way flight with Vueling Airlines.Outbound indirect flight with Vueling Airlines, departing from London Heathrow on Fri, Oct 3, arriving in St Lucia Vigie.Price includes taxes and charges.From $529, select.
Castries.$578 per passenger.Departing Wed, Nov 5.One-way flight with British Airways.Outbound indirect flight with British Airways, departing from London Heathrow on Wed, Nov 5, arriving in St Lucia Vigie.Price includes taxes and charges.From $578, select.
Castries.$637 per passenger.Departing Tue, Jan 13.One-way flight with British Airways.Outbound indirect flight with British Airways, departing from London Heathrow on Tue, Jan 13, arriving in St Lucia Hewanorra.Price includes taxes and charges.From $637, select.
Castries.$638 per passenger.Departing Tue, Jul 1.One-way flight with Vueling Airlines.Outbound indirect flight with Vueling Airlines, departing from London Heathrow on Tue, Jul 1, arriving in St Lucia Hewanorra.Price includes taxes and charges.From $638, select.

Find the cheapest month to fly from London Heathrow to Castries

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London Heathrow to Castries flights are currently cheapest in September.
May
from $490
Jun
from $444
Jul
from $638
Aug
from $526
Sep
from $442
Oct
from $529
Nov
from $578
Dec
from $690
Jan
from $637
Feb
from $690
Mar
from $713
Apr
from $706

Alternative London Heathrow to Castries routes

Looking for the cheapest, fastest or easiest route from London Heathrow 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$442
Cheapest month to flySeptember

Finding cheap flights from London Heathrow 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 London Heathrow to Castries is $783. 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 London Heathrow to Castries. But we found flights with one or more stops from $783.
There are no flights flying from London Heathrow to Castries, as of May 2025.
The cheapest month to fly from London Heathrow to Castries is usually October.
If you're flying from London Heathrow Airport, the cheapest airport near Castries is St Lucia Hewanorra – which is 19.0 miles away from the center of Castries. We've found flights to this airport from $783.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to Castries on Wednesday, October 22, 2025.
No airlines currently offer direct flights between London Heathrow 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 May, the average temperature is usually around 81°F. September is typically the warmest month in Castries, when it usually averages around 83°F. You can expect the least rain in February. The coldest month is February, with temperatures averaging 77°F. The rainiest month is October.
Currently, SWISS offers the cheapest flight tickets to Castries.

Traveling from London Heathrow Airport (LHR) to Castries: what you need to know

  • London Heathrow Airport is located in London. Following the UTC-4 timezone, Castries is four hours behind London.

  • To avoid missing your LHR to Castries flight, leave enough time for things like baggage drop and finding your gate. Turning up two hours ahead of international departures and an hour before domestic flights is the standard rule.

  • If you're heading away during a major holiday or another peak period, give yourself more time. A good rule is two hours before domestic flights and up to four hours before international departures. Queues at check-in and security will be longer.

  • Begin your journey at LHR and travel nonstop to Hewanorra Airport (UVF). That's where you can expect to touch down when searching for London Heathrow Airport to Castries tickets.

  • Virgin Atlantic is a popular carrier that offers direct flights from London Heathrow Airport to Castries.

  • Stopovers are the perfect opportunity to break up your trip and possibly even tick a new city off your list. When searching for plane tickets from LHR to Castries, uncheck the 'Direct flights only' box to see where you can visit along the way. Here are some popular options to consider:

    • Hartsfield-Jackson Atlanta International Airport (ATL)

    • John F. Kennedy International Airport (JFK)

    • Grantley Adams International Airport (BGI)

  • Located around 16 miles from central London, LHR can be reached in about 55 minutes by car. Traveling on public transport takes roughly 1 hour.

  • Have an early flight from London Heathrow Airport to Castries? Avoid the stress of rushing to the terminal (and catch some extra z's) by choosing one of these hotels close to LHR:

  • 68.18% of flights leaving from London Heathrow Airport touch down at their destination on time.

How to find the cheapest flights from London Heathrow Airport (LHR) to Castries

  • $442 is currently the lowest price for a one-way London Heathrow Airport to Castries flight. A return plane ticket starts at $783. These fares can change depending on demand.

  • Get cheap flights from LHR to Castries by booking one month ahead. According to our research, that's the best time for finding a bargain.

  • The best month for finding cheap London Heathrow Airport to Castries tickets is May. Use the 'Whole month' tool to compare prices, then select the dates with the lowest fares.

  • Save time looking for cheap flights from LHR to Castries by creating a Price Alert. We'll send you an email or push notification on the app when a new discounted fare appears.

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

Airports in Castries

George F. L. Charles Airport (SLU)

  • George F. L. Charles Airport (SLU) to the center of Castries takes about 5 minutes by car. The center is roughly 2 miles away.

  • Traveling by public transport will take you around 40 minutes.

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

  • Begin your adventure by picking up a George F. L. Charles Airport rental car. Grab your wheels from Drive A Matic, Final Rentals or Sixt to explore Castries and beyond.

  • Get the best deal by booking your vehicle from George F. L. Charles Airport about one week ahead of your flight from LHR to Castries.

Hewanorra Airport (UVF)

  • Once your flight from London Heathrow Airport to Castries has landed, you can make your way to the city center in around 1 hour 10 minutes by car. Central Castries is roughly 35 miles from Hewanorra Airport (UVF).

  • After stepping off your LHR to Castries flight, rest your head at a hotel close to UVF. These are some great accommodation options that'll help you switch to relaxation mode:

  • Drive A Matic, Sixt and Final Rentals make collecting a Hewanorra Airport rental car simple. These trusted companies are located in or around the terminal and will have you behind the wheel before you know it.

  • Get first dibs on the best options. Reserving your ride from UVF one week ahead of time often means better prices and a wider selection of vehicles.

Best time to go to Castries

  • Carefully consider your trip dates before booking your flight from London Heathrow Airport to Castries. The city buzzes during high season, but prices are often higher and major attractions can be busy. Go to Castries in the low season if you prefer a quieter vibe.

  • Lock in a London Heathrow Airport to Castries plane ticket with a departure in September if you want to visit the city during its warmest month. Expect temperatures to range from 79ºF to 86ºF.

  • If you like cooler conditions, look for a cheap ticket from LHR to Castries in February when temperatures average between 75ºF and 82ºF.

More about Castries

  • Start your Castries trip right by choosing the ideal place to stay. As soon as you've booked your flight from London Heathrow Airport to Castries, check out our range of hotels including:

  • Morne Fortune and Derek Walcott Square are just a couple of the popular attractions to add to your Castries must-do list. Keep the momentum going by heading to Immaculate Conception Church.

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.