£389+ Cheap Flights from London Heathrow Airport to Saint Lucia | Cheapflights

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Cheap flight deals from Heathrow to Saint Lucia

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Cheapest flights from Heathrow to Saint Lucia
Explore the most affordable flight options available from Heathrow to Saint Lucia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 August 2026.

Tue 27/1007:25 -

1 stop35h 47m

Tue 3/1117:32 -

1 stop24h 08m

Deal found 26/8£610

Wed 28/1007:25 -

1 stop35h 47m

Wed 11/1117:15 -

1 stop23h 30m

Deal found 26/8£646

Tue 6/1011:55 -

1 stop32h 38m

Tue 13/1016:25 -

1 stop23h 20m

Deal found 22/8£654

Sun 4/1011:55 -

1 stop32h 38m

Sun 18/1016:39 -

1 stop35h 51m

Deal found 25/8£660

Fri 4/1218:40 -

2 stops50h 00m

Mon 14/1217:40 -

2 stops23h 20m

Deal found 22/8£668

Fri 25/911:10 -

1 stop12h 50m

Fri 2/1012:35 -

1 stop12h 40m

Deal found 26/8£668

Mon 26/1017:00 -

2 stops26h 04m

Mon 2/1116:41 -

2 stops22h 19m

Deal found 23/8£669

Sat 17/1016:40 -

2 stops26h 00m

Tue 27/1014:55 -

1 stop16h 25m

Deal found 25/8£670

Sat 10/1014:10 -

2 stops29h 10m

Sat 17/1014:42 -

2 stops36h 18m

Deal found 25/8£675

Thu 29/1013:25 -

1 stop26h 40m

Fri 18/1212:35 -

1 stop13h 15m

Deal found 25/8£706

Sun 13/909:35 -

1 stop14h 25m

Fri 18/915:45 -

1 stop12h 35m

Deal found 25/8£709

Mon 5/1011:10 -

1 stop12h 50m

Mon 12/1012:35 -

1 stop12h 40m

Deal found 24/8£720

Best flights from Heathrow to Saint Lucia
Discover carefully curated flight deals from Heathrow to Saint Lucia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 27 August 2026.

Wed 17/210:35 -

1 stop12h 25m

Wed 3/315:45 -

1 stop12h 45m

Deal found 27/8£636

Sat 10/1012:15 -

1 stop31h 49m

Sat 17/1016:04 -

1 stop33h 51m

Deal found 25/8£682

Fri 2/1006:50 -

2 stops35h 41m

Sat 10/1014:35 -

2 stops35h 20m

Deal found 24/8£971

Mon 5/1017:25 -

2 stops25h 17m

Mon 12/1014:42 -

2 stops23h 13m

Deal found 22/8£692

Fri 4/1210:35 -

1 stop12h 25m

Mon 7/1212:35 -

1 stop13h 15m

Deal found 23/8£733

Thu 10/910:45 -

1 stop13h 15m

Thu 24/912:35 -

1 stop12h 15m

Deal found 24/8£733

Mon 5/1011:10 -

1 stop12h 50m

Mon 12/1012:35 -

1 stop12h 40m

Deal found 25/8£734

Fri 2/1012:15 -

1 stop30h 47m

Fri 9/1016:04 -

1 stop15h 31m

Deal found 26/8£823

Fri 23/1008:00 -

2 stops34h 31m

Sat 31/1012:52 -

1 stop19h 08m

Deal found 22/8£978

Thu 14/113:25 -

1 stop29h 50m

Sat 23/115:45 -

1 stop12h 45m

Deal found 22/8£735

Tue 10/1113:25 -

1 stop29h 50m

Tue 24/1115:45 -

1 stop12h 45m

Deal found 23/8£763

Fri 8/110:35 -

1 stop12h 25m

Mon 18/115:45 -

1 stop12h 45m

Deal found 22/8£764

Sat 23/113:25 -

1 stop26h 40m

Fri 29/115:45 -

1 stop12h 45m

Deal found 23/8£768

Fri 23/1014:05 -

2 stops54h 35m

Sat 31/1016:17 -

2 stops34h 53m

Deal found 22/8£776

Fri 2/1009:30 -

2 stops33h 01m

Fri 9/1015:10 -

1 stop15h 40m

Deal found 26/8£817

Sun 11/1011:10 -

1 stop12h 50m

Mon 26/1015:45 -

1 stop12h 45m

Deal found 22/8£822

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£610
One-way from	£389

JetBlue

JetBlue
27/10-3/11
2 total stops
59h 55m total
London to Saint Lucia

4/9

4/9
3 total stops
45h 30m total
London to Saint Lucia

Cheapflights 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

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

Sat 10/10

12:15-15:04

1 stop31h 49m

Castries Hewanorra

Sat 17/10

16:04-06:55

1 stop33h 51m

£682

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Mon 5/10

17:25-13:42

2 stops25h 17m

Castries Hewanorra

Mon 12/10

14:42-18:55

2 stops23h 13m

£692

LondonCastries

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

LHRSLU

London Heathrow

Fri 4/12

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Mon 7/12

12:35-05:50

1 stop13h 15m

£733

LondonCastries

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

LHRSLU

London Heathrow

Thu 10/9

10:45-19:00

1 stop13h 15m

Castries George F. L. Charle

Thu 24/9

12:35-05:50

1 stop12h 15m

£733

LondonCastries

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

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

£734

LondonCastries

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

LHRSLU

London Heathrow

Thu 14/1

13:25-15:15

1 stop29h 50m

Castries George F. L. Charle

Sat 23/1

15:45-08:30

1 stop12h 45m

£735

LondonCastries

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

LHRSLU

London Heathrow

Tue 10/11

13:25-15:15

1 stop29h 50m

Castries George F. L. Charle

Tue 24/11

15:45-08:30

1 stop12h 45m

£763

LondonCastries

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

LHRSLU

London Heathrow

Fri 8/1

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Mon 18/1

15:45-08:30

1 stop12h 45m

£764

LondonCastries

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

LHRSLU

London Heathrow

Sat 23/1

13:25-12:05

1 stop26h 40m

Castries George F. L. Charle

Fri 29/1

15:45-08:30

1 stop12h 45m

£768

Flights are sorted by cheapest return flights first.

Deals found on 24/8

Showing 1-10 of 33 resultsSorted by cheapest first

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2

3

4

Best time to book a flight from Heathrow to Saint Lucia

Have a flexible travel schedule? Discover the best time to fly to Saint Lucia from Heathrow with our price prediction graph.

LHR-UVF

LHR-SLU

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Saint Lucia

LHR-LC0

LHR-UVF

LHR-SLU

What is the cheapest month to book a flight from London Heathrow Airport to Saint Lucia?

Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £494). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,196). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Saint Lucia

Read reviews from past customers who have flown with American Airlines,Air Canada, andBritish Airways from London Heathrow Airport to Saint Lucia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

American Airlines

7.1

Good

Reviews

1 / 20

10.0

Excellent

Ron,Aug 2026

LHR - LAX

Unfortunately it took an hour and 15 minutes for luggage to get to customs so I had to pay for hotel and other ticket to get home Missed flight

American Airlines

7.1

Good

American Airlines

7.1

Good

Reviews

1 / 20

10.0

Excellent

Ron,Aug 2026

LHR - LAX

Unfortunately it took an hour and 15 minutes for luggage to get to customs so I had to pay for hotel and other ticket to get home Missed flight

7.1

Good

American Airlines

7.1

Good

Reviews

1 / 20

10.0

Excellent

Ron,Aug 2026

LHR - LAX

Unfortunately it took an hour and 15 minutes for luggage to get to customs so I had to pay for hotel and other ticket to get home Missed flight

British Airways

6.7

Okay

American Airlines

7.1

Good

Reviews

1 / 20

10.0

Excellent

Ron,Aug 2026

LHR - LAX

Unfortunately it took an hour and 15 minutes for luggage to get to customs so I had to pay for hotel and other ticket to get home Missed flight

Related info for your journey

How long is the flight from London Heathrow Airport to Saint Lucia?
American Airlines can get you from London Heathrow Airport to Saint Lucia in just under 31h 49m. Your travel time can differ by up to . The distance between London Heathrow Airport and Saint Lucia is about 4217 mi.
Can I find deals for flights from Heathrow to Saint Lucia that include hotel bookings?
Yes. In addition to deals on Heathrow to Saint Lucia flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Saint Lucia?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Saint Lucia.
Can I find deals for business class flights from Heathrow to Saint Lucia?
Yes. Cheapflights offers flight deals from Heathrow to Saint Lucia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London Heathrow Airport to Saint Lucia?
Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £494). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,196). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 3 airlines flying from Heathrow to Saint Lucia

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£494	Average£755	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£563	Average£869	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	Cheapest£651	Average£734	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

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How does Cheapflights help users find flights from Heathrow to Saint Lucia?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Saint Lucia. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Saint Lucia?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Heathrow to Saint Lucia for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Heathrow to Saint Lucia with no change fees?

Yes! Cheapflights helps users easily find flights from Heathrow to Saint Lucia with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Saint Lucia become cheaper?

Yes! Start tracking prices for Heathrow to Saint Lucia flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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