C$635 Cheap Flights from London Heathrow (LHR) to Castries (SLUA)

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Flight deals from London Heathrow to Castries

Looking for a cheap last-minute deal or the best return flight from London Heathrow Airport to Castries? If you want to travel next month, return fares start from C$1,423. Find the lowest prices on one-way and return tickets right here.

Castries.C$635 per passenger.Departing Tue., Jun. 16.One-way flight with Aer Lingus.Outbound indirect flight with Aer Lingus, departs from London Heathrow on Tue., Jun. 16, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$635, select.

Castries.C$679 per passenger.Departing Tue., May 19.One-way flight with Aer Lingus.Outbound indirect flight with Aer Lingus, departs from London Heathrow on Tue., May 19, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$679, select.

Castries.C$742 per passenger.Departing Tue., Sep. 1.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Tue., Sep. 1, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$742, select.

Castries.C$808 per passenger.Departing Tue., Aug. 25.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Tue., Aug. 25, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$808, select.

Castries.C$818 per passenger.Departing Fri., Oct. 2.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Fri., Oct. 2, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$818, select.

Castries.C$896 per passenger.Departing Sat., Nov. 14.One-way flight with Vueling Airlines.Outbound indirect flight with Vueling Airlines, departs from London Heathrow on Sat., Nov. 14, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$896, select.

Castries.C$945 per passenger.Departing Sat., Jul. 4.One-way flight with Aer Lingus.Outbound indirect flight with Aer Lingus, departs from London Heathrow on Sat., Jul. 4, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$945, select.

Castries.C$952 per passenger.Departing Wed., Dec. 9.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Wed., Dec. 9, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$952, select.

Castries.C$982 per passenger.Departing Mon., Feb. 1.One-way flight with SWISS.Outbound indirect flight with SWISS, departs from London Heathrow on Mon., Feb. 1, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$982, select.

Castries.C$989 per passenger.Departing Wed., Jan. 6.One-way flight with SWISS.Outbound indirect flight with SWISS, departs from London Heathrow on Wed., Jan. 6, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$989, select.

Castries.C$1,072 per passenger.Departing Wed., Mar. 10.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Wed., Mar. 10, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$1,072, select.

Castries.C$1,137 per passenger.Departing Thu., Apr. 1.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from London Heathrow on Thu., Apr. 1, arriving in St Lucia Hewanorra.Price includes taxes and charges.From C$1,137, 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 June.

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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.

St Lucia Vigie

1km from central Castries

Closest

from C$798

Search flights

St Lucia Hewanorra

31km from central Castries

Cheapest

from C$635

Search flights

London to Castries: Flight information

The things to know before you go.

Cheapest flight found	C$635
Cheapest month to fly	June

Finding cheap flights from London Heathrow to Castries: Frequently asked questions

How many airports are there in Castries?

There are 2 airports in Castries: St Lucia Vigie and St Lucia Hewanorra.

How much are return flights from London Heathrow to Castries?

The best price we found for a return flight from London Heathrow to Castries is C$1,349. 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.

Which airlines fly direct from London Heathrow to Castries?

Currently, there are no airlines that fly direct from London Heathrow to Castries. But we found flights with one or more stops from C$1,349.

How many flights are there a week from London Heathrow to Castries?

As of May 2026, there are no flights flying from London Heathrow to Castries.

When is the cheapest time to fly from London Heathrow to Castries?

The cheapest month to fly from London Heathrow to Castries is usually January.

Which is the cheapest airport to fly into in Castries?

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 C$1,349.

Which upcoming date is cheapest to fly from London Heathrow Airport to Castries on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to Castries on Monday, January 18, 2027.

Can I get a direct flight from London Heathrow Airport to Castries?

No airlines currently offer direct flights between London Heathrow Airport and Castries. Most routes have one or more stops.

How can I get the best flight deal from London Heathrow Airport to Castries?

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.

When is the best time to book flights to Castries?

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.

What’s the weather like in Castries?

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.

Which is the cheapest airline to fly from London Heathrow Airport to Castries with?

Currently, Delta offers the cheapest flight tickets to Castries.

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

Around 8 hours 30 minutes is how long you'll be travelling on a direct flight from London Heathrow Airport to Castries.
London Heathrow Airport is located in London. Operating on the UTC-4 timezone, Castries is 4 hours behind London.
For a stress-free journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This will give you plenty of time to catch your flight from LHR to Castries.
You can expect longer lines during popular months like July and other peak periods. Arriving up to fours hours ahead of an international flight and two hours for domestic departures is a smart move.
You can book a nonstop flight from London Heathrow Airport to Castries. Begin your journey at LHR and arrive at Hewanorra Airport (UVF).
Virgin Atlantic is a leading airline that offers direct flights from London Heathrow Airport to Castries.
We make it a cinch to plan a flight from LHR to Castries with a stopover. To see all your options, deselect 'Direct flights only.' Then, simply pick a flight offering a stop long enough to see the sights of your chosen city. Major stopovers include:
- Grantley Adams International Airport (BGI)
- John F. Kennedy International Airport (JFK)
- Hartsfield-Jackson Atlanta International Airport (ATL)
You won't need a visa for Saint Lucia if you hold a passport from United Kingdom and are travelling for tourism purposes. Visa and travel documentation requirements are subject to changes or updates. So before reserving your flight tickets from London Heathrow Airport to Castries, check with your airline and your destination country's local embassy or consulate for up-to-date information.
Located around 31 kilometres from central London, LHR can be reached in about 57 minutes by car (depending on traffic). The journey on public transport will take roughly 1 hour and 1 minute.
Want an easy start to your vacation? Stay near LHR. Whether you've booked an early flight from London Heathrow Airport to Castries or want to avoid feeling rushed, these hotels are ideal:

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

C$635 is the best price for a one-way ticket from London Heathrow Airport to Castries. Return flights start at C$1,349. These prices may change based on availability and demand.
Book 9 months before you want to fly. After looking at the numbers on our calendar, this is how far you should book ahead to find cheap tickets from LHR to Castries.
May is the cheapest month for tickets from London Heathrow Airport to Castries. If you'd like to travel during a different time of year, the 'Whole month' tool will show you the lowest prices across every month.
Set up a Price Alert for cheap tickets from LHR to Castries. You don't need to check back in every day to see if prices have fallen. We'll update you the moment the price changes.
Play around with the filters to find your ideal trip. To see the 'Fastest,' 'Cheapest' or 'Best' flights from London Heathrow Airport to Castries, use the 'Sort by' tool. You can also filter by airline, arrival and departure times, and journey duration.

Airports in Castries

Hewanorra Airport (UVF)

Hewanorra Airport (UVF) to central Castries is approximately 56 kilometres. It'll take you about 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 getting in late on a flight from London Heathrow Airport to Castries. Book one of these accommodation options near UVF instead:

George F. L. Charles Airport (SLU)

George F. L. Charles Airport (SLU) is roughly 3 kilometres from the centre of Castries. After your flight from London Heathrow Airport to Castries, it'll take you around 6 minutes to reach the heart of the city in a cab or ride-share.
If you're catching public transport, it'll take around 40 minutes.
Place the 'Do not disturb' sign on your door and relax at a hotel close to SLU. Here are a few options where you can take a load off after your flight from LHR to Castries:

Best time to go to Castries

It's time to plan your dates for your flight from London Heathrow Airport to Castries. July is the busiest month to visit Castries. If you prefer a more relaxed atmosphere, go in May.
Lock in your flight from London Heathrow Airport to Castries for September to experience the city during its warmest month. You can expect temperatures to range from 26ºC to 30ºC.
Search for cheap flights from LHR to Castries in February if you like cooler conditions. Temperatures are at their lowest then, ranging between 24ºC and 28ºC on average.

More about Castries

Start your Castries trip right by choosing the ideal place to stay. After booking your flight from London Heathrow Airport to Castries, check out our selection of accommodation options including:
Derek Walcott Square and Morne Fortune are just a couple of the popular attractions to add to your Castries to-do list. Keep the sightseeing going at Immaculate Conception Church.

Complete your Castries trip with a car rental

Finding you a cheap flight from London Heathrow Airport to Castries isn't the only trick up our sleeve. Check out our car rentals in Castries and explore on your own terms. We search for deals from trusted car rental providers and put them all in one place. Instantly compare rates and then book with no fees.