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Cheap flights from London Heathrow Airport to Saint Lucia from £421

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Saint Lucia departing on 15/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from London Heathrow Airport to Saint Lucia

Cheap return flights

Enter your travel dates to find the best prices.
JetBlue Logo
08:15 - 12:30
LHR
-
UVF
33h 15m
1 stop
JetBlue Logo
16:25 - 20:45
UVF
-
LHR
23h 20m
1 stop
£654JetBlue
Tue, 1 Sep - Mon, 21 Sep
Multiple Airlines Logo
11:10 - 19:00
LHR
-
SLU
12h 50m
1 stop
Multiple Airlines Logo
12:35 - 06:15
SLU
-
LHR
12h 40m
1 stop
£658Multiple Airlines
Mon, 5 Oct - Mon, 12 Oct
Multiple Airlines Logo
11:10 - 19:00
LHR
-
SLU
12h 50m
1 stop
Multiple Airlines Logo
12:35 - 06:15
SLU
-
LHR
12h 40m
1 stop
£659Multiple Airlines
Mon, 5 Oct - Mon, 12 Oct
JetBlue Logo
07:25 - 16:09
LHR
-
UVF
36h 44m
1 stop
JetBlue Logo
17:01 - 21:40
UVF
-
LHR
24h 39m
1 stop
£669JetBlue
Mon, 16 Nov - Mon, 23 Nov
JetBlue Logo
08:15 - 15:20
LHR
-
UVF
36h 05m
1 stop
JetBlue Logo
16:25 - 09:30
UVF
-
LHR
36h 05m
1 stop
£670JetBlue
Wed, 30 Sep - Sun, 11 Oct
Multiple Airlines Logo
10:35 - 19:00
LHR
-
SLU
12h 25m
1 stop
Multiple Airlines Logo
12:35 - 05:50
SLU
-
LHR
13h 15m
1 stop
£670Multiple Airlines
Fri, 4 Dec - Sat, 12 Dec
American Airlines Logo
14:30 - 15:03
LHR
-
UVF
28h 33m
1 stop
American Airlines Logo
15:10 - 11:40
UVF
-
LHR
16h 30m
1 stop
£680American Airlines
Sun, 25 Oct - Thu, 29 Oct
American Airlines Logo
19:05 - 15:02
LHR
-
UVF
23h 57m
2 stops
American Airlines Logo
16:05 - 06:30
UVF
-
LHR
34h 25m
2 stops
£680American Airlines
Sun, 6 Dec - Fri, 8 Jan
American Airlines Logo
14:10 - 14:19
LHR
-
UVF
29h 09m
2 stops
American Airlines Logo
15:19 - 12:10
UVF
-
LHR
15h 51m
1 stop
£681American Airlines
Thu, 6 Aug - Mon, 31 Aug
American Airlines Logo
18:00 - 12:29
LHR
-
UVF
22h 29m
1 stop
American Airlines Logo
16:05 - 07:20
UVF
-
LHR
35h 15m
1 stop
£682American Airlines
Fri, 1 Jan - Sun, 31 Jan

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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
25 Oct
LHR19:10London Heathrow
23h 53m
2 stops
UVF15:03Castries Hewanorra
4 Nov
UVF14:28Castries Hewanorra
16h 47m
2 stops
LHR11:15London Heathrow
£680
American Airlines
6 Dec
LHR19:05London Heathrow
23h 57m
2 stops
UVF15:02Castries Hewanorra
8 Jan
UVF16:05Castries Hewanorra
34h 25m
2 stops
LHR06:30London Heathrow
£680
American Airlines
6 Aug
LHR14:10London Heathrow
29h 09m
2 stops
UVF14:19Castries Hewanorra
31 Aug
UVF15:19Castries Hewanorra
15h 51m
1 stop
LHR12:10London Heathrow
£681

JetBlue flights from London Heathrow Airport to Saint Lucia

Our best JetBlue deals on London Heathrow Airport to Saint Lucia flight tickets
JetBlue
1 Sept
LHR08:15London Heathrow
33h 15m
1 stop
UVF12:30Castries Hewanorra
21 Sept
UVF16:25Castries Hewanorra
23h 20m
1 stop
LHR20:45London Heathrow
£654
JetBlue
16 Nov
LHR07:25London Heathrow
36h 44m
1 stop
UVF16:09Castries Hewanorra
23 Nov
UVF17:01Castries Hewanorra
24h 39m
1 stop
LHR21:40London Heathrow
£669
JetBlue
30 Sept
LHR08:15London Heathrow
36h 05m
1 stop
UVF15:20Castries Hewanorra
11 Oct
UVF16:25Castries Hewanorra
36h 05m
1 stop
LHR09:30London Heathrow
£670

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport to Saint Lucia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 10 July 2026.
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 - UVF

LHRUVF

London Heathrow

Tue 1/9

08:15-12:30

1 stop33h 15m

Castries Hewanorra

Mon 21/9

16:25-20:45

1 stop23h 20m

£654
Fastest return journey

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 5/10

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Mon 12/10

12:35-06:15

1 stop12h 40m

£658

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 5/10

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Mon 12/10

12:35-06:15

1 stop12h 40m

£659

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 16/11

07:25-16:09

1 stop36h 44m

Castries Hewanorra

Mon 23/11

17:01-21:40

1 stop24h 39m

£669

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 30/9

08:15-15:20

1 stop36h 05m

Castries Hewanorra

Sun 11/10

16:25-09:30

1 stop36h 05m

£670

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 4/12

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Sat 12/12

12:35-05:50

1 stop13h 15m

£670

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 25/10

14:30-15:03

1 stop28h 33m

Castries Hewanorra

Thu 29/10

15:10-11:40

1 stop16h 30m

£680

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 6/12

19:05-15:02

2 stops23h 57m

Castries Hewanorra

Fri 8/1

16:05-06:30

2 stops34h 25m

£680

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 6/8

14:10-14:19

2 stops29h 09m

Castries Hewanorra

Mon 31/8

15:19-12:10

1 stop15h 51m

£681

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 1/1

18:00-12:29

1 stop22h 29m

Castries Hewanorra

Sun 31/1

16:05-07:20

1 stop35h 15m

£682

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Saint Lucia from

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

What is the cheapest month to fly to Saint Lucia?

The month of September is, on average, the cheapest month to fly to Saint Lucia from London Heathrow Airport, with most prices found around £494. If you don’t want to visit Saint Lucia in September, then you should wait until May to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £502.

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

You could potentially save up to 46% 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

Fastest flight time

12h 25m

Direct flights

None
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.
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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?

  • 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.

  • What is the most popular plane model 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
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom £502Free CancellationRating
6.7
8,105 reviews
Search British Airways flights
JetBluePriceFrom £535Free CancellationRating
7.1
3,012 reviews
Search JetBlue flights
American AirlinesPriceFrom £572Free CancellationRating
7.1
11,802 reviews
Search American Airlines flights
Air CanadaPriceFrom £637Free CancellationRating
7.1
11,324 reviews
Search Air Canada flights
KLMPriceFrom £1,161Free CancellationRating
7.8
1,533 reviews
Search KLM 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

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