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684 € Cheap Flights from London Heathrow to Castries

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 return flight from London Heathrow to Castries? Find the lowest prices on one-way and return tickets right here.
Castries.684 € per passenger.Departing Thu, 30 Oct, returning Thu, 13 Nov.Return flight with jetBlue.Outbound indirect flight with jetBlue, departs from London Heathrow on Thu, 30 Oct, arriving in St Lucia Hewanorra.Inbound indirect flight with jetBlue, departs from St Lucia Hewanorra on Thu, 13 Nov, arriving in London Heathrow.Price includes taxes and charges.From 684 €, select.
Castries.726 € per passenger.Departing Sun, 16 Nov, returning Thu, 27 Nov.Return flight with jetBlue.Outbound indirect flight with jetBlue, departs from London Heathrow on Sun, 16 Nov, arriving in St Lucia Hewanorra.Inbound indirect flight with jetBlue, departs from St Lucia Hewanorra on Thu, 27 Nov, arriving in London Heathrow.Price includes taxes and charges.From 726 €, select.
Castries.761 € per passenger.Departing Tue, 27 Jan, returning Wed, 11 Feb.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Tue, 27 Jan, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Wed, 11 Feb, arriving in London Heathrow.Price includes taxes and charges.From 761 €, select.
Castries.761 € per passenger.Departing Tue, 20 Jan, returning Wed, 28 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 Wed, 28 Jan, arriving in London Heathrow.Price includes taxes and charges.From 761 €, select.
Castries.762 € per passenger.Departing Tue, 2 Dec, returning Sun, 11 Jan.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Tue, 2 Dec, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Sun, 11 Jan, arriving in London Heathrow.Price includes taxes and charges.From 762 €, select.
Castries.763 € 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 763 €, select.
Castries.764 € per passenger.Departing Tue, 17 Mar, returning Fri, 27 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 Fri, 27 Mar, arriving in London Heathrow.Price includes taxes and charges.From 764 €, select.
Castries.768 € per passenger.Departing Mon, 1 Dec, returning Mon, 8 Dec.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Mon, 1 Dec, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Mon, 8 Dec, arriving in London Heathrow.Price includes taxes and charges.From 768 €, 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 November.
Sep
from 820 €
Oct
from 793 €
Nov
from 726 €
Dec
from 768 €
Jan
from 761 €
Feb
from 763 €
Mar
from 764 €
Apr
from 809 €
May
from 807 €
Jun
from 1.017 €
Jul
from 1.028 €
Aug
from 1.176 €

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 found684 €
Cheapest month to flyOctober

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 return flight from London Heathrow to Castries is 684 €. 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 684 €.
As of September 2025, there are no flights flying from London Heathrow to Castries.
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 30.5 km away from the centre of Castries. We've found flights into this airport from 684 €.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to Castries on Thursday, 30 October 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 September, 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, jetBlue offers the cheapest flight tickets to Castries.

Travelling 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 26 kilometres from central London, LHR can be reached in about 55 minutes by car. Travelling 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

  • 399 € is currently the lowest price for a one-way London Heathrow Airport to Castries flight. A return plane ticket starts at 684 €. 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 centre of Castries takes about 5 minutes by car. The centre is roughly 3 kilometres away.

  • Travelling 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 centre in around 1 hour 10 minutes by car. Central Castries is roughly 56 kilometres 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 26ºC (79ºF) to 30ºC (86ºF).

  • If you like cooler conditions, look for a cheap ticket from LHR to Castries in February when temperatures average between 24ºC (75ºF) and 28ºC (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.