£357+ 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 30 September 2026.

Wed 7/1011:15 -

1 stop31h 57m

Wed 14/1015:32 -

1 stop34h 43m

Deal found 25/9£479

Wed 2/1210:50 -

1 stop32h 14m

Wed 9/1216:26 -

1 stop33h 59m

Deal found 27/9£550

Thu 5/1108:00 -

1 stop15h 00m

Thu 26/1115:45 -

1 stop12h 10m

Deal found 27/9£588

Wed 11/1108:00 -

1 stop15h 00m

Wed 18/1115:45 -

1 stop15h 10m

Deal found 27/9£589

Fri 6/1108:00 -

1 stop32h 05m

Thu 12/1115:45 -

1 stop12h 10m

Deal found 27/9£601

Mon 9/1110:50 -

1 stop32h 15m

Mon 23/1116:25 -

1 stop34h 00m

Deal found 29/9£614

Sat 21/1112:20 -

1 stop31h 47m

Thu 26/1117:22 -

1 stop23h 33m

Deal found 29/9£623

Sat 5/1213:25 -

1 stop26h 40m

Sun 13/1215:45 -

1 stop12h 45m

Deal found 28/9£624

Tue 10/1112:20 -

1 stop31h 52m

Tue 17/1117:17 -

1 stop24h 23m

Deal found 26/9£628

Sun 8/1114:45 -

1 stop32h 10m

Mon 23/1116:50 -

1 stop11h 05m

Deal found 29/9£650

Mon 26/1014:45 -

1 stop25h 20m

Thu 5/1115:45 -

1 stop12h 10m

Deal found 25/9£652

Wed 18/1114:45 -

1 stop32h 15m

Wed 25/1115:45 -

1 stop12h 10m

Deal found 27/9£653

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 30 September 2026.

Wed 2/1210:50 -

1 stop32h 14m

Wed 9/1216:26 -

1 stop33h 59m

Deal found 29/9£614

Thu 5/1108:00 -

1 stop15h 00m

Thu 26/1115:45 -

1 stop12h 10m

Deal found 28/9£641

Sun 8/1111:15 -

1 stop30h 15m

Mon 23/1115:56 -

1 stop16h 09m

Deal found 26/9£684

Thu 12/1118:00 -

1 stop26h 40m

Mon 23/1117:35 -

2 stops23h 25m

Deal found 29/9£732

Sat 24/1016:05 -

2 stops27h 07m

Tue 3/1116:32 -

1 stop35h 18m

Deal found 25/9£950

Fri 26/206:50 -

2 stops34h 17m

Sat 6/317:17 -

1 stop35h 53m

Deal found 26/9£974

Wed 17/210:35 -

1 stop12h 25m

Wed 3/315:45 -

1 stop12h 45m

Deal found 25/9£643

Fri 8/110:35 -

1 stop12h 25m

Sun 17/112:35 -

1 stop13h 15m

Deal found 27/9£644

Wed 6/116:25 -

2 stops25h 51m

Wed 20/115:38 -

1 stop16h 02m

Deal found 29/9£873

Thu 21/113:25 -

1 stop26h 40m

Thu 18/212:35 -

1 stop13h 15m

Deal found 27/9£751

Mon 9/1109:40 -

2 stops33h 25m

Mon 16/1116:25 -

1 stop15h 15m

Deal found 25/9£950

Sat 21/1119:20 -

2 stops24h 07m

Sat 28/1114:29 -

2 stops17h 31m

Deal found 29/9£897

Tue 1/1210:35 -

1 stop12h 25m

Wed 9/1212:35 -

1 stop13h 15m

Deal found 25/9£755

Fri 23/1008:00 -

2 stops34h 31m

Sat 31/1016:17 -

2 stops58h 23m

Deal found 27/9£1,029

Tue 10/1120:10 -

2 stops22h 55m

Tue 17/1116:25 -

1 stop15h 15m

Deal found 26/9£951

Wed 2/1210:35 -

1 stop12h 25m

Wed 9/1212:35 -

1 stop13h 15m

Deal found 29/9£771

Thu 12/1108:00 -

1 stop15h 00m

Mon 23/1115:45 -

1 stop15h 10m

Deal found 29/9£806

Sun 8/1113:25 -

1 stop26h 40m

Mon 23/1115:45 -

1 stop12h 45m

Deal found 26/9£914

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£550
One-way from	£357

KLM

KLM
2/12-9/12
2 total stops
66h 13m total
London to Saint Lucia

2/12-31/12

2/12-31/12
2 total stops
34h 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

Wed 2/12

08:15-14:55

2 stops34h 40m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£357

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Fri 4/12

14:50-14:55

3 stops28h 05m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£445

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Mon 15/2

14:50-14:55

2 stops28h 05m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£493

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Mon 25/1

15:00-14:55

1 stop27h 55m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£507

Fastest return journey

LondonCastries

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

LHRSLU

London Heathrow

Thu 31/12

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£547

LondonCastries

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

LHRSLU

London Heathrow

Sat 5/12

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£557

LondonCastries

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

LHRSLU

London Heathrow

Mon 5/10

09:35-18:55

1 stop14h 20m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£568

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Mon 30/11

14:50-14:55

2 stops28h 05m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£568

LondonCastries

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

LHRSLU

London Heathrow

Sun 31/1

13:25-12:05

1 stop26h 40m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£569

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Thu 5/11

07:25-16:12

1 stop36h 47m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£577

Flights are sorted by cheapest return flights first.

Deals found on 25/9

Showing 1-10 of 40 resultsSorted by cheapest first

1

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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £590). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,231). 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?
KLM, American Airlines, and Air Canada can get you from London Heathrow Airport to Saint Lucia in just under 26h 40m. Your travel time can differ by up to 5h 34m. 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £590). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,231). 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£513	Average£807	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Air Canada	Cheapest£670	Average£752	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
American Airlines	Cheapest£684	Average£880	FlexibilityNo cancel fee	On-time71%	Search American Airlines 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.

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

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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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