£379+ Cheap Flights from London Heathrow Airport to Saint Lucia | Cheapflights

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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 22 September 2026.

Thu 29/1010:50 -

1 stop31h 22m

Wed 11/1116:25 -

1 stop34h 00m

Deal found 18/9£549

Mon 2/1108:00 -

1 stop15h 00m

Sun 15/1115:45 -

1 stop15h 10m

Deal found 21/9£587

Wed 4/1114:45 -

1 stop32h 15m

Wed 11/1115:45 -

1 stop12h 10m

Deal found 20/9£599

Mon 14/1210:35 -

1 stop12h 25m

Wed 20/115:45 -

1 stop12h 45m

Deal found 17/9£630

Mon 7/1210:35 -

1 stop12h 25m

Tue 22/1212:35 -

1 stop13h 15m

Deal found 21/9£631

Mon 2/1118:00 -

1 stop24h 55m

Tue 10/1115:55 -

1 stop15h 25m

Deal found 19/9£632

Sun 1/1114:45 -

1 stop25h 20m

Sun 8/1115:45 -

1 stop15h 10m

Deal found 17/9£639

Sun 25/1014:45 -

1 stop28h 30m

Sun 8/1115:45 -

1 stop15h 10m

Deal found 18/9£641

Wed 2/1209:00 -

2 stops35h 40m

Wed 9/1217:35 -

1 stop34h 55m

Deal found 21/9£642

Sun 6/1213:25 -

1 stop26h 40m

Wed 16/1215:45 -

1 stop12h 45m

Deal found 17/9£646

Wed 9/1210:35 -

1 stop32h 40m

Sun 13/1212:35 -

1 stop13h 15m

Deal found 20/9£652

Thu 5/1113:25 -

2 stops31h 15m

Thu 12/1117:35 -

1 stop32h 55m

Deal found 21/9£652

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£549
One-way from	£379

KLM

KLM
29/10-11/11
2 total stops
65h 22m total
London to Saint Lucia

25/11-31/12

25/11-31/12
2 total stops
30h 40m 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

Tue 3/11

07:25-16:12

1 stop36h 47m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£397

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Wed 13/1

08:15-14:55

2 stops34h 40m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£414

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sun 7/2

19:55-14:55

2 stops47h 00m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£420

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Wed 25/11

18:00-14:55

1 stop24h 55m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£461

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sat 10/10

14:10-13:40

3 stops28h 30m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£561

LondonCastries

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

LHRSLU

London Heathrow

Wed 25/11

13:25-12:05

1 stop26h 40m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£571

LondonCastries

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

LHRSLU

London Heathrow

Sun 7/2

14:45-18:55

1 stop32h 10m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£584

LondonCastries

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

LHRSLU

London Heathrow

Tue 27/10

18:00-19:00

2 stops29h 00m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£586

LondonCastries

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

LHRSLU

London Heathrow

Wed 13/1

19:20-13:10

2 stops21h 50m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£587

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sun 1/11

18:00-16:40

1 stop26h 40m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£596

Flights are sorted by cheapest return flights first.

Deals found on 19/9

Showing 1-10 of 30 resultsSorted by cheapest first

1

2

3

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-SLU

LHR-UVF

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-SLU

LHR-UVF

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 £503). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,218). 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 Air Canada,American Airlines, 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.

7.1

Good

Reviews

1 / 20

8.0

Excellent

Anonymous,Oct 2024

NRT - YYZ

Did not like delay since I also had a delay from Toronto to Narita. I understand about safety aspect, but on both legs of trip had me pondering about reliability of Air Canada equipment. I was not aware that aircraft was boarding - no announcement. I had placed my cell phone in air plane mode early.

7.1

Good

7.1

Good

Reviews

1 / 20

8.0

Excellent

Anonymous,Oct 2024

NRT - YYZ

Did not like delay since I also had a delay from Toronto to Narita. I understand about safety aspect, but on both legs of trip had me pondering about reliability of Air Canada equipment. I was not aware that aircraft was boarding - no announcement. I had placed my cell phone in air plane mode early.

American Airlines

7.0

Good

7.1

Good

Reviews

1 / 20

8.0

Excellent

Anonymous,Oct 2024

NRT - YYZ

Did not like delay since I also had a delay from Toronto to Narita. I understand about safety aspect, but on both legs of trip had me pondering about reliability of Air Canada equipment. I was not aware that aircraft was boarding - no announcement. I had placed my cell phone in air plane mode early.

British Airways

6.7

Okay

7.1

Good

Reviews

1 / 20

8.0

Excellent

Anonymous,Oct 2024

NRT - YYZ

Did not like delay since I also had a delay from Toronto to Narita. I understand about safety aspect, but on both legs of trip had me pondering about reliability of Air Canada equipment. I was not aware that aircraft was boarding - no announcement. I had placed my cell phone in air plane mode early.

Related info for your journey

How long is the flight from London Heathrow Airport to Saint Lucia?
Delta and United Airlines can get you from London Heathrow Airport to Saint Lucia in just under 22h 02m. Your travel time can differ by up to 7h. 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 £503). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,218). 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.

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Top 3 airlines flying from Heathrow to Saint Lucia

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£503	Average£769	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£573	Average£864	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	Cheapest£662	Average£747	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

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