£392+ 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 10 September 2026.

Fri 2/1011:10 -

1 stop12h 50m

Fri 9/1012:35 -

1 stop12h 40m

Deal found 6/9£608

Wed 9/1213:25 -

1 stop26h 40m

Sun 20/1215:45 -

1 stop12h 45m

Deal found 9/9£620

Sun 13/1210:35 -

1 stop12h 25m

Thu 24/1215:45 -

1 stop12h 45m

Deal found 8/9£627

Fri 9/1008:15 -

1 stop35h 49m

Sun 18/1016:39 -

1 stop35h 51m

Deal found 5/9£629

Thu 29/1012:20 -

1 stop30h 52m

Wed 11/1117:17 -

1 stop24h 23m

Deal found 9/9£630

Wed 4/1114:45 -

1 stop32h 15m

Wed 11/1115:45 -

1 stop15h 10m

Deal found 8/9£634

Sat 3/1017:50 -

1 stop24h 50m

Sun 11/1014:30 -

1 stop15h 40m

Deal found 7/9£643

Mon 7/1210:35 -

1 stop12h 25m

Thu 10/1212:35 -

1 stop13h 15m

Deal found 6/9£647

Sat 3/1008:15 -

1 stop36h 19m

Sat 17/1016:25 -

1 stop36h 05m

Deal found 7/9£658

Sat 14/1112:20 -

1 stop31h 52m

Sat 21/1117:31 -

1 stop23h 24m

Deal found 8/9£659

Sun 6/1213:25 -

1 stop26h 40m

Fri 11/1212:35 -

1 stop13h 15m

Deal found 6/9£660

Sat 10/1008:15 -

1 stop36h 19m

Sat 17/1016:25 -

1 stop36h 05m

Deal found 9/9£671

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 10 September 2026.

Sun 6/1213:25 -

1 stop26h 40m

Fri 11/1212:35 -

1 stop13h 15m

Deal found 6/9£660

Wed 6/106:00 -

2 stops38h 40m

Wed 13/117:40 -

2 stops47h 20m

Deal found 6/9£823

Fri 5/212:40 -

1 stop30h 25m

Fri 12/216:25 -

2 stops23h 45m

Deal found 8/9£855

Fri 23/1018:00 -

1 stop24h 31m

Sat 31/1016:17 -

2 stops33h 38m

Deal found 5/9£981

Fri 9/1011:10 -

1 stop12h 50m

Mon 19/1012:35 -

1 stop12h 40m

Deal found 6/9£781

Tue 2/216:35 -

2 stops26h 30m

Wed 10/216:25 -

2 stops34h 25m

Deal found 8/9£855

Thu 24/1213:25 -

1 stop26h 40m

Thu 31/1215:45 -

1 stop12h 45m

Deal found 5/9£852

Wed 30/1215:35 -

2 stops27h 40m

Fri 8/116:25 -

2 stops23h 45m

Deal found 6/9£881

Wed 14/1009:35 -

1 stop14h 25m

Tue 3/1115:45 -

1 stop15h 10m

Deal found 6/9£855

Wed 17/218:00 -

2 stops29h 00m

Wed 24/212:35 -

2 stops18h 45m

Deal found 5/9£894

Wed 30/912:50 -

2 stops30h 22m

Wed 7/1015:32 -

1 stop16h 43m

Deal found 6/9£1,046

Mon 12/1011:10 -

1 stop12h 50m

Mon 2/1115:45 -

1 stop12h 45m

Deal found 8/9£925

Thu 3/1214:45 -

1 stop25h 20m

Wed 9/1215:45 -

1 stop12h 10m

Deal found 6/9£927

Wed 18/1111:10 -

3 stops35h 50m

Fri 27/1109:10 -

2 stops22h 10m

Deal found 7/9£936

Wed 25/1113:25 -

1 stop26h 40m

Thu 3/1212:35 -

1 stop13h 15m

Deal found 6/9£936

Mon 21/1213:20 -

1 stop26h 45m

Tue 5/115:45 -

1 stop12h 45m

Deal found 7/9£967

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£608
One-way from	£392

2/10-9/10

2/10-9/10
2 total stops
25h 30m total
London to Saint Lucia

JetBlue

JetBlue
10/10-31/12
1 total stop
36h 19m 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 10/10

08:15-15:34

1 stop36h 19m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£392

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Thu 15/10

17:40-14:15

1 stop25h 35m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£542

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Fri 25/12

14:50-14:55

3 stops28h 05m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£555

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

£557

Fastest return journey

LondonCastries

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

LHRSLU

London Heathrow

Mon 26/10

08:00-18:55

1 stop14h 55m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£562

LondonCastries

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

LHRSLU

London Heathrow

Sun 15/11

13:25-15:15

1 stop29h 50m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£598

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Thu 24/12

13:00-16:40

2 stops31h 40m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£607

LondonCastries

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

LHRSLU

London Heathrow

Fri 25/12

08:00-19:00

1 stop15h 00m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£612

LondonCastries

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

LHRSLU

London Heathrow

Sat 26/9

08:30-12:05

2 stops56h 35m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£623

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Fri 25/12

18:00-14:55

1 stop24h 55m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£633

Flights are sorted by cheapest return flights first.

Deals found on 6/9

Showing 1-10 of 34 resultsSorted by cheapest first

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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 £497). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,202). 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?
Air Canada, Delta, and United Airlines can get you from London Heathrow Airport to Saint Lucia in just under 24h 31m. Your travel time can differ by up to 14h 09m. 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 £497). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,202). 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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Alternative routes for Heathrow to Saint Lucia

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London City to Santo Domingo flights

Top 3 airlines flying from Heathrow to Saint Lucia

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£496	Average£759	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£566	Average£853	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	Cheapest£654	Average£738	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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