£394+ 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 21 August 2026.

Wed 23/911:55 -

1 stop32h 39m

Sat 26/916:25 -

1 stop36h 05m

Deal found 19/8£614

Mon 14/908:15 -

1 stop36h 18m

Mon 28/916:39 -

1 stop23h 06m

Deal found 17/8£639

Thu 8/1008:15 -

1 stop36h 05m

Sun 18/1016:25 -

1 stop23h 20m

Deal found 16/8£644

Thu 1/1008:15 -

1 stop36h 19m

Sun 11/1016:25 -

1 stop36h 05m

Deal found 20/8£646

Wed 21/1017:15 -

2 stops50h 00m

Mon 2/1117:40 -

2 stops39h 20m

Deal found 19/8£663

Fri 4/1218:40 -

2 stops50h 00m

Mon 14/1217:40 -

2 stops23h 20m

Deal found 17/8£663

Fri 9/1011:55 -

1 stop32h 08m

Thu 22/1016:25 -

1 stop23h 20m

Deal found 19/8£674

Fri 9/1008:15 -

1 stop35h 48m

Mon 19/1016:25 -

1 stop36h 05m

Deal found 20/8£676

Wed 21/1015:00 -

1 stop28h 20m

Sun 1/1116:01 -

2 stops22h 59m

Deal found 19/8£677

Thu 15/1020:10 -

2 stops22h 32m

Sat 24/1014:42 -

2 stops35h 08m

Deal found 19/8£677

Mon 14/911:10 -

1 stop12h 50m

Mon 28/912:35 -

1 stop12h 40m

Deal found 17/8£700

Thu 1/1010:45 -

1 stop13h 15m

Thu 8/1012:35 -

1 stop12h 15m

Deal found 17/8£713

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 21 August 2026.

Mon 26/1017:00 -

2 stops26h 04m

Mon 2/1116:07 -

2 stops34h 33m

Deal found 18/8£678

Wed 17/210:35 -

1 stop12h 25m

Wed 3/315:45 -

1 stop12h 45m

Deal found 19/8£718

Sat 6/211:15 -

2 stops55h 50m

Thu 25/216:25 -

2 stops34h 25m

Deal found 20/8£882

Fri 13/1106:50 -

2 stops34h 17m

Sat 21/1113:52 -

1 stop38h 03m

Deal found 19/8£963

Tue 20/1020:10 -

2 stops22h 32m

Tue 27/1016:04 -

1 stop16h 01m

Deal found 18/8£684

Wed 6/110:35 -

1 stop12h 25m

Thu 28/115:45 -

1 stop12h 45m

Deal found 20/8£721

Wed 23/911:10 -

1 stop29h 55m

Sat 26/912:35 -

1 stop12h 40m

Deal found 19/8£722

Fri 4/1210:35 -

1 stop12h 25m

Mon 7/1212:35 -

1 stop13h 15m

Deal found 16/8£727

Fri 23/1012:00 -

1 stop30h 31m

Sat 31/1012:52 -

1 stop37h 03m

Deal found 19/8£971

Wed 6/110:35 -

1 stop12h 25m

Fri 22/115:45 -

1 stop12h 45m

Deal found 20/8£738

Sat 19/911:15 -

1 stop31h 57m

Mon 21/915:32 -

1 stop16h 43m

Deal found 21/8£1,032

Thu 22/1016:40 -

2 stops49h 51m

Sat 31/1016:17 -

2 stops33h 38m

Deal found 19/8£971

Sun 20/911:10 -

1 stop12h 50m

Tue 20/1012:35 -

1 stop12h 40m

Deal found 18/8£761

Wed 16/915:15 -

1 stop27h 57m

Sat 19/915:32 -

1 stop16h 43m

Deal found 21/8£1,048

Fri 2/1011:05 -

2 stops31h 26m

Sat 10/1014:35 -

2 stops35h 10m

Deal found 21/8£977

Thu 1/1010:45 -

1 stop13h 15m

Sun 11/1012:35 -

1 stop12h 40m

Deal found 20/8£782

Sat 12/909:40 -

2 stops33h 32m

Sun 27/915:32 -

1 stop16h 43m

Deal found 20/8£1,069

Tue 1/911:45 -

2 stops31h 29m

Sat 31/1015:32 -

1 stop16h 08m

Deal found 17/8£1,085

Mon 5/1011:10 -

1 stop12h 50m

Mon 7/612:35 -

1 stop12h 40m

Deal found 17/8£831

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£614
One-way from	£394

JetBlue

JetBlue
23/9-26/9
2 total stops
68h 44m total
London to Saint Lucia

JetBlue

JetBlue
25/9
1 total stop
35h 49m 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

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Mon 26/10

17:00-15:04

2 stops26h 04m

Castries Hewanorra

Mon 2/11

16:07-06:40

2 stops34h 33m

£678

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Tue 20/10

20:10-13:42

2 stops22h 32m

Castries Hewanorra

Tue 27/10

16:04-12:05

1 stop16h 01m

£684

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

£718

LondonCastries

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

LHRSLU

London Heathrow

Wed 6/1

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Thu 28/1

15:45-08:30

1 stop12h 45m

£721

LondonCastries

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

LHRSLU

London Heathrow

Wed 23/9

11:10-12:05

1 stop29h 55m

Castries George F. L. Charle

Sat 26/9

12:35-06:15

1 stop12h 40m

£722

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

£727

LondonCastries

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

LHRSLU

London Heathrow

Wed 6/1

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Fri 22/1

15:45-08:30

1 stop12h 45m

£738

LondonCastries

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

LHRSLU

London Heathrow

Sun 20/9

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Tue 20/10

12:35-06:15

1 stop12h 40m

£761

LondonCastries

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

LHRSLU

London Heathrow

Thu 1/10

10:45-19:00

1 stop13h 15m

Castries George F. L. Charle

Sun 11/10

12:35-06:15

1 stop12h 40m

£782

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 7/6

12:35-06:15

1 stop12h 40m

£831

Flights are sorted by cheapest return flights first.

Deals found on 19/8

Showing 1-10 of 35 resultsSorted by cheapest first

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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 £1,195). 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, Delta, and United Airlines can get you from London Heathrow Airport to Saint Lucia in just under 26h 04m. Your travel time can differ by up to 8h 27m. The distance between London Heathrow Airport and Saint Lucia is about 4217 mi. Both multi-stop and direct flights can be found to your destination and back.
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 £1,195). 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£562	Average£868	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	Cheapest£650	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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