£383+ 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 15 September 2026.

Tue 27/1007:25 -

1 stop35h 47m

Tue 3/1117:32 -

1 stop24h 08m

Deal found 12/9£611

Thu 29/1012:20 -

1 stop30h 52m

Wed 11/1117:17 -

1 stop24h 23m

Deal found 14/9£632

Sun 1/1114:45 -

1 stop25h 20m

Sun 8/1115:45 -

1 stop15h 10m

Deal found 14/9£636

Sat 10/1017:50 -

1 stop24h 50m

Sun 18/1014:30 -

1 stop15h 40m

Deal found 11/9£648

Mon 23/1112:20 -

1 stop31h 42m

Tue 1/1216:55 -

1 stop36h 35m

Deal found 14/9£657

Thu 29/1013:25 -

1 stop26h 40m

Wed 11/1115:45 -

1 stop12h 45m

Deal found 10/9£659

Fri 9/1011:55 -

1 stop32h 09m

Sat 17/1016:25 -

1 stop36h 05m

Deal found 11/9£662

Wed 28/1014:45 -

1 stop25h 20m

Wed 4/1115:45 -

1 stop15h 10m

Deal found 13/9£665

Sun 11/1008:15 -

1 stop36h 19m

Fri 23/1016:39 -

1 stop23h 06m

Deal found 11/9£673

Tue 1/1206:00 -

2 stops38h 40m

Fri 11/1217:35 -

2 stops32h 55m

Deal found 13/9£677

Tue 27/1014:45 -

1 stop25h 20m

Mon 2/1115:45 -

1 stop15h 10m

Deal found 11/9£696

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 15 September 2026.

Wed 17/210:35 -

1 stop12h 25m

Wed 3/315:45 -

1 stop12h 45m

Deal found 15/9£637

Thu 29/1019:10 -

2 stops23h 54m

Wed 11/1114:32 -

2 stops27h 38m

Deal found 15/9£682

Thu 29/1008:55 -

1 stop33h 17m

Wed 11/1116:25 -

1 stop35h 25m

Deal found 15/9£848

Sat 3/1008:15 -

1 stop36h 19m

Sat 10/1016:24 -

1 stop36h 06m

Deal found 14/9£910

Fri 23/1008:00 -

2 stops34h 31m

Sat 31/1012:52 -

1 stop19h 08m

Deal found 13/9£986

Thu 29/1014:45 -

1 stop25h 20m

Thu 5/1115:45 -

1 stop12h 10m

Deal found 14/9£696

Thu 29/1013:25 -

1 stop29h 50m

Wed 11/1115:45 -

1 stop12h 45m

Deal found 10/9£703

Thu 3/1219:10 -

2 stops24h 31m

Tue 22/1215:47 -

1 stop16h 18m

Deal found 15/9£838

Wed 28/1013:25 -

1 stop26h 40m

Wed 4/1115:45 -

1 stop12h 45m

Deal found 13/9£765

Sat 26/918:35 -

2 stops24h 37m

Wed 7/1015:32 -

1 stop16h 43m

Deal found 14/9£950

Sat 3/1015:40 -

1 stop27h 22m

Sat 10/1014:40 -

2 stops21h 35m

Deal found 14/9£966

Sat 3/1011:10 -

1 stop12h 50m

Sat 10/1012:35 -

1 stop12h 40m

Deal found 15/9£802

Tue 27/1014:45 -

2 stops32h 15m

Mon 2/1119:40 -

2 stops35h 15m

Deal found 11/9£893

Sun 25/1018:00 -

2 stops29h 00m

Sun 1/1112:35 -

3 stops28h 25m

Deal found 10/9£909

Sat 2/114:45 -

1 stop25h 20m

Sat 9/112:35 -

1 stop18h 20m

Deal found 13/9£928

Sun 7/207:45 -

2 stops15h 15m

Sun 21/215:45 -

1 stop15h 10m

Deal found 11/9£999

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£582
One-way from	£383

JetBlue

JetBlue
11/1-20/1
2 total stops
59h 07m total
London to Saint Lucia

JetBlue

JetBlue
14/11-31/12
1 total stop
31h 52m 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

Sat 14/11

12:20-16:12

1 stop31h 52m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£383

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Tue 2/2

08:50-15:34

2 stops34h 44m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£497

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sat 14/11

12:05-16:40

3 stops32h 35m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£504

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sun 31/1

06:00-16:40

2 stops38h 40m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£532

Fastest return journey

LondonCastries

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

LHRSLU

London Heathrow

Sun 31/1

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£553

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sat 6/2

18:00-16:40

1 stop26h 40m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£567

LondonCastries

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

LHRSLU

London Heathrow

Sat 6/2

13:25-12:05

1 stop26h 40m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£576

LondonCastries

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

LHRSLU

London Heathrow

Mon 1/2

13:20-12:05

1 stop26h 45m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£576

LondonCastries

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

LHRSLU

London Heathrow

Sat 14/11

18:00-19:00

2 stops29h 00m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£588

LondonCastries

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

LHRSLU

London Heathrow

Wed 3/2

14:45-12:05

1 stop25h 20m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£632

Flights are sorted by cheapest return flights first.

Deals found on 11/9

Showing 1-10 of 34 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 £499). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,207). 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 and Delta can get you from London Heathrow Airport to Saint Lucia in just under 23h 54m. Your travel time can differ by up to 9h 23m. 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 £499). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,207). 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£498	Average£762	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£568	Average£856	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	Cheapest£656	Average£741	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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