What is the cheapest airline that flies from London Heathrow to Saint Lucia?

American Airlines is the most popular carrier operating from London Heathrow to Saint Lucia

Which airlines fly to Saint Lucia?

British Airways, American Airlines and Air Canada are the top three most popular airlines that fly to Saint Lucia from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 65% of people opting to fly with this airline when travelling to Saint Lucia. Keep in mind that there are 3 different airlines that fly to Saint Lucia on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from London Heathrow Airport to Saint Lucia?

Prices for flights from London Heathrow Airport to Saint Lucia are refreshed on a daily basis.

How many operators does momondo search for flights from London Heathrow Airport to Saint Lucia?

The number of operators available for flights from London Heathrow Airport to Saint Lucia is 3 as of August 2026.

How old do you have to be to fly from London Heathrow Airport to Saint Lucia?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Saint Lucia.

What documentation or ID do you need to fly to Saint Lucia?

The travel and health documents you'll need for your trip to Saint Lucia may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Saint Lucia. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

£390 Cheap Flights from London Heathrow Airport to Saint Lucia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from London Heathrow Airport to Saint Lucia

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

07:25 - 15:12LHR London Heathrow-UVF Castries Hewanorra

35h 47m1 stop New York John F Kennedy Intl

17:32 - 21:40UVF Castries Hewanorra-LHR London Heathrow

24h 08m1 stop New York John F Kennedy Intl

£611JetBlue

Tue, 27 Oct - Tue, 3 Nov

10:35 - 19:00LHR London Heathrow-SLU Castries George F. L. Charle

12h 25m1 stop Bridgetown Grantley Adams Intl

12:35 - 05:50SLU Castries George F. L. Charle-LHR London Heathrow

13h 15m1 stop Bridgetown Grantley Adams Intl

£617Multiple Airlines

Tue, 2 Feb - Wed, 10 Feb

10:35 - 19:00LHR London Heathrow-SLU Castries George F. L. Charle

12h 25m1 stop Bridgetown Grantley Adams Intl

15:45 - 08:30SLU Castries George F. L. Charle-LHR London Heathrow

12h 45m1 stop Bridgetown Grantley Adams Intl

£637Multiple Airlines

Wed, 17 Feb - Wed, 3 Mar

19:25 - 15:04LHR London Heathrow-UVF Castries Hewanorra

24h 39m2 stops New York John F Kennedy Intl Miami

16:04 - 19:45UVF Castries Hewanorra-LHR London Heathrow

22h 41m2 stops Miami New York John F Kennedy Intl

£675British Airways

Wed, 7 Oct - Wed, 14 Oct

14:10 - 14:20LHR London Heathrow-UVF Castries Hewanorra

29h 10m2 stops New York John F Kennedy Intl Charlotte Douglas

14:42 - 08:00UVF Castries Hewanorra-LHR London Heathrow

36h 18m2 stops Miami Boston Logan Intl

£676British Airways

Sat, 10 Oct - Sat, 17 Oct

19:25 - 16:40LHR London Heathrow-UVF Castries Hewanorra

49h 15m2 stops Vienna Intl Toronto Pearson Intl

17:40 - 08:30UVF Castries Hewanorra-LHR London Heathrow

34h 50m1 stop Toronto Pearson Intl

£681Air Canada

Fri, 15 Jan - Mon, 25 Jan

19:25 - 16:40LHR London Heathrow-UVF Castries Hewanorra

49h 15m2 stops Vienna Intl Toronto Pearson Intl

17:40 - 21:00UVF Castries Hewanorra-LHR London Heathrow

23h 20m2 stops Toronto Pearson Intl Halifax Intl

£681Air Canada

Fri, 15 Jan - Mon, 25 Jan

12:15 - 15:04LHR London Heathrow-UVF Castries Hewanorra

31h 49m1 stop Miami

16:04 - 21:40UVF Castries Hewanorra-LHR London Heathrow

24h 36m2 stops Miami New York John F Kennedy Intl

£681American Airlines

Wed, 7 Oct - Wed, 14 Oct

13:10 - 13:32LHR London Heathrow-UVF Castries Hewanorra

28h 22m2 stops Philadelphia Miami

17:02 - 22:10UVF Castries Hewanorra-LHR London Heathrow

25h 08m2 stops Miami New York John F Kennedy Intl

£681American Airlines

Sun, 13 Dec - Sun, 17 Jan

14:10 - 14:20LHR London Heathrow-UVF Castries Hewanorra

29h 10m2 stops New York John F Kennedy Intl Charlotte Douglas

16:04 - 09:00UVF Castries Hewanorra-LHR London Heathrow

35h 56m1 stop Miami

£682British Airways

Sat, 10 Oct - Sat, 17 Oct

Cheap last-minute flights

Enter your travel dates to find the best prices.

12:15 - 13:49LHR London Heathrow-UVF Castries Hewanorra

30h 34m1 stop Miami

14:49 - 06:25UVF Castries Hewanorra-LHR London Heathrow

34h 36m2 stops Miami New York John F Kennedy Intl

£683American Airlines

Tue, 1 Sep - Fri, 4 Sep

15:20 - 13:49LHR London Heathrow-UVF Castries Hewanorra

27h 29m2 stops New York John F Kennedy Intl Miami

14:49 - 21:40UVF Castries Hewanorra-LHR London Heathrow

25h 51m2 stops Miami New York John F Kennedy Intl

£683American Airlines

Tue, 1 Sep - Thu, 3 Sep

12:15 - 13:49LHR London Heathrow-UVF Castries Hewanorra

30h 34m1 stop Miami

15:02 - 21:40UVF Castries Hewanorra-LHR London Heathrow

25h 38m2 stops Miami New York John F Kennedy Intl

£683American Airlines

Tue, 1 Sep - Mon, 14 Sep

15:20 - 13:49LHR London Heathrow-UVF Castries Hewanorra

27h 29m2 stops New York John F Kennedy Intl Miami

15:02 - 06:50UVF Castries Hewanorra-LHR London Heathrow

34h 48m2 stops Miami New York John F Kennedy Intl

£683American Airlines

Tue, 1 Sep - Sun, 13 Sep

12:15 - 13:49LHR London Heathrow-UVF Castries Hewanorra

30h 34m1 stop Miami

15:02 - 21:40UVF Castries Hewanorra-LHR London Heathrow

25h 38m2 stops Miami New York John F Kennedy Intl

£683American Airlines

Tue, 1 Sep - Thu, 17 Sep

16:35 - 13:49LHR London Heathrow-UVF Castries Hewanorra

26h 14m2 stops New York John F Kennedy Intl Miami

15:02 - 07:20UVF Castries Hewanorra-LHR London Heathrow

35h 18m2 stops Miami New York John F Kennedy Intl

£683American Airlines

Tue, 1 Sep - Thu, 17 Sep

12:15 - 13:49LHR London Heathrow-UVF Castries Hewanorra

30h 34m1 stop Miami

15:19 - 06:55UVF Castries Hewanorra-LHR London Heathrow

34h 36m1 stop Charlotte Douglas

£683American Airlines

Tue, 1 Sep - Fri, 4 Sep

15:20 - 13:49LHR London Heathrow-UVF Castries Hewanorra

27h 29m2 stops New York John F Kennedy Intl Miami

15:02 - 06:40UVF Castries Hewanorra-LHR London Heathrow

34h 38m2 stops Miami New York John F Kennedy Intl

£683American Airlines

Tue, 1 Sep - Mon, 14 Sep

09:35 - 12:05LHR London Heathrow-SLU Castries George F. L. Charle

31h 30m1 stop Bridgetown Grantley Adams Intl

15:45 - 09:20SLU Castries George F. L. Charle-LHR London Heathrow

12h 35m1 stop Bridgetown Grantley Adams Intl

£697Multiple Airlines

Wed, 2 Sep - Wed, 16 Sep

15:15 - 14:14LHR London Heathrow-UVF Castries Hewanorra

27h 59m1 stop Atlanta Hartsfield-Jackson

15:32 - 13:15UVF Castries Hewanorra-LHR London Heathrow

16h 43m1 stop Atlanta Hartsfield-Jackson

£885Delta

Tue, 1 Sep - Tue, 15 Sep

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Air Canada flights from London Heathrow Airport to Saint Lucia

Our best Air Canada deals on London Heathrow Airport to Saint Lucia flight tickets

Air Canada

15 Jan

LHR19:25London Heathrow

49h 15m

2 stops

UVF16:40Castries Hewanorra

25 Jan

UVF17:40Castries Hewanorra

34h 50m

1 stop

LHR08:30London Heathrow

£681

Air Canada

4 Dec

LHR13:45London Heathrow

54h 55m

2 stops

UVF16:40Castries Hewanorra

14 Dec

UVF17:40Castries Hewanorra

23h 20m

2 stops

LHR21:00London Heathrow

£684

Air Canada

14 Jan

LHR11:10London Heathrow

33h 30m

1 stop

UVF16:40Castries Hewanorra

27 Jan

UVF17:40Castries Hewanorra

32h 50m

1 stop

LHR06:30London Heathrow

£691

American Airlines flights from London Heathrow Airport to Saint Lucia

Our best American Airlines deals on London Heathrow Airport to Saint Lucia flight tickets

American Airlines

14 Dec

LHR16:40London Heathrow

27h 01m

2 stops

UVF15:41Castries Hewanorra

12 Jan

UVF16:05Castries Hewanorra

15h 35m

1 stop

LHR11:40London Heathrow

£681

American Airlines

10 Sept

LHR19:25London Heathrow

23h 37m

2 stops

UVF14:02Castries Hewanorra

24 Sept

UVF15:02Castries Hewanorra

16h 33m

1 stop

LHR12:35London Heathrow

£682

American Airlines

4 Oct

LHR09:55London Heathrow

32h 47m

1 stop

UVF13:42Castries Hewanorra

8 Oct

UVF16:04Castries Hewanorra

15h 31m

1 stop

LHR12:35London Heathrow

£683

momondo Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Saint Lucia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Tue 27/10

07:25-15:12

1 stop35h 47m

Castries Hewanorra

Tue 3/11

17:32-21:40

1 stop24h 08m

£611

LondonCastries

LHR London Heathrow - SLU Castries George F. L. Charle

LHRSLU

London Heathrow

Tue 2/2

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Wed 10/2

12:35-05:50

1 stop13h 15m

£617

Fastest return journey

LondonCastries

LHR London Heathrow - SLU Castries George F. L. Charle

LHRSLU

London Heathrow

Wed 17/2

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Wed 3/3

15:45-08:30

1 stop12h 45m

£636

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Wed 7/10

19:25-15:04

2 stops24h 39m

Castries Hewanorra

Wed 14/10

16:04-19:45

2 stops22h 41m

£675

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sat 10/10

14:10-14:20

2 stops29h 10m

Castries Hewanorra

Sat 17/10

14:42-08:00

2 stops36h 18m

£676

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Fri 15/1

19:25-16:40

2 stops49h 15m

Castries Hewanorra

Mon 25/1

17:40-08:30

1 stop34h 50m

£681

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Fri 15/1

19:25-16:40

2 stops49h 15m

Castries Hewanorra

Mon 25/1

17:40-21:00

2 stops23h 20m

£681

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Wed 7/10

12:15-15:04

1 stop31h 49m

Castries Hewanorra

Wed 14/10

16:04-21:40

2 stops24h 36m

£681

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sun 13/12

13:10-13:32

2 stops28h 22m

Castries Hewanorra

Sun 17/1

17:02-22:10

2 stops25h 08m

£681

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sat 10/10

14:10-14:20

2 stops29h 10m

Castries Hewanorra

Sat 17/10

16:04-09:00

1 stop35h 56m

£682

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London Heathrow Airport to Saint Lucia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Saint Lucia?

The month of May is, on average, the cheapest month to fly to Saint Lucia from London Heathrow Airport, with most prices found around £495. If you don’t want to visit Saint Lucia in May, then you should wait until September to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £575.

Can stopping save me money on London Heathrow Airport to Saint Lucia flights?

You could potentially save up to 27% on your flight if you consider stops on a London Heathrow Airport to Saint Lucia flight.

Cheap London Heathrow Airport to Saint Lucia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Saint Lucia

Best price found	£390
Fastest flight time	12h 25m
Direct flights	None

The best one-way flight to Saint Lucia from London Heathrow Airport in the past 72 hours is £390. The best return flight deal from London Heathrow Airport to Saint Lucia found on momondo in the last 72 hours is £611.

The fastest flight from London Heathrow Airport to Saint Lucia takes 12h 25m

There are no direct flights from London Heathrow Airport to Saint Lucia. There are no popular flight routes from London Heathrow Airport to Saint Lucia.

Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Saint Lucia

When did momondo last update prices for flights from London Heathrow Airport to Saint Lucia?
Prices for flights from London Heathrow Airport to Saint Lucia are refreshed on a daily basis.
How many operators does momondo search for flights from London Heathrow Airport to Saint Lucia?
The number of operators available for flights from London Heathrow Airport to Saint Lucia is 3 as of August 2026.
How old do you have to be to fly from London Heathrow Airport to Saint Lucia?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Saint Lucia.
What documentation or ID do you need to fly to Saint Lucia?
The travel and health documents you'll need for your trip to Saint Lucia may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Saint Lucia. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from London Heathrow Airport to Saint Lucia

Compare and see reviews for airlines that fly from London Heathrow Airport to Saint Lucia with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom £495	Free Cancellation	Rating 6.7 8,190 reviews	Search British Airways flights
American Airlines	PriceFrom £564	Free Cancellation	Rating 7.1 12,022 reviews	Search American Airlines flights
Air Canada	PriceFrom £652	Free Cancellation	Rating 7.1 11,548 reviews	Search Air Canada flights

Why use momondo?

Why should I use momondo to find a flight deal from London to Saint Lucia?

Finding the right flight to Saint Lucia from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Saint Lucia quick and easy, saving you time and money.

Can I find flights from London to Saint Lucia with flexible booking policies on momondo?

All flight searches from London to Saint Lucia on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from London to Saint Lucia?

momondo helps you find the best flight between London and Saint Lucia by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from London to Saint Lucia right now. Can momondo alert me if prices change?

If you are not ready to book a flight from London to Saint Lucia now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Saint Lucia and let you know when they change.

An easier way to manage your Saint Lucia trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

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Popular Cities in Saint Lucia

Flights to Castriesfrom £684

Cheap flights from London Heathrow Airport to Saint Lucia from £390

Find the cheapest flights from London Heathrow Airport to Saint Lucia

Cheap return flights

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Cheap last-minute flights

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

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Air Canada flights from London Heathrow Airport to Saint Lucia

Our best Air Canada deals on London Heathrow Airport to Saint Lucia flight tickets

American Airlines flights from London Heathrow Airport to Saint Lucia

Our best American Airlines deals on London Heathrow Airport to Saint Lucia flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Saint Lucia that are best for you.

See travel insights to Saint Lucia from

How to get the cheapest flight ticket from London Heathrow Airport to Saint Lucia

What is the cheapest month to fly to Saint Lucia?

Can stopping save me money on London Heathrow Airport to Saint Lucia flights?

What is the cheapest airline that flies from London Heathrow to Saint Lucia?

Which airlines fly to Saint Lucia?

Cheap London Heathrow Airport to Saint Lucia flight deals and tips

Best price found

Fastest flight time

Direct flights

Frequently asked questions about flying from London Heathrow Airport to Saint Lucia

Best airlines flying from London Heathrow Airport to Saint Lucia

Compare and see reviews for airlines that fly from London Heathrow Airport to Saint Lucia with momondo

Why use momondo?

An easier way to manage your Saint Lucia trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Saint Lucia

Popular Cities in Saint Lucia

Popular flights according to clicks in the last 7 days on momondo

London Heathrow Airport flight routes

According to popular flight searches on momondo this year

Saint Lucia flight routes

According to popular flight searches on momondo this year

Fly your favourite airline to Saint Lucia

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Saint Lucia

List of cabin classes available on flights landing in Saint Lucia. Availability may vary depending on flight origin and airline.

Complete your trip to Saint Lucia

Explore popular destinations other users love

According to popular flight searches on momondo this year