£387+ 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 16 August 2026.

Fri 18/908:15 -

1 stop35h 49m

Mon 28/916:39 -

1 stop23h 06m

Deal found 13/8£618

Mon 14/908:15 -

1 stop36h 18m

Sun 20/916:39 -

1 stop23h 06m

Deal found 13/8£642

Mon 14/908:15 -

1 stop36h 18m

Sun 27/916:39 -

1 stop35h 51m

Deal found 15/8£643

Thu 24/908:15 -

1 stop36h 19m

Mon 28/916:39 -

1 stop23h 06m

Deal found 14/8£646

Thu 17/908:15 -

1 stop36h 19m

Mon 28/916:39 -

1 stop23h 06m

Deal found 12/8£647

Mon 28/911:55 -

1 stop32h 38m

Mon 5/1016:39 -

1 stop23h 06m

Deal found 14/8£652

Wed 30/908:15 -

1 stop36h 19m

Wed 7/1016:39 -

1 stop23h 06m

Deal found 11/8£656

Mon 7/1220:05 -

2 stops48h 35m

Mon 14/1217:40 -

2 stops23h 20m

Deal found 11/8£666

Sun 6/909:15 -

1 stop34h 04m

Tue 3/1114:32 -

2 stops27h 38m

Deal found 13/8£669

Mon 9/1107:25 -

1 stop36h 44m

Mon 16/1117:15 -

1 stop36h 15m

Deal found 15/8£673

Mon 14/911:10 -

1 stop12h 50m

Sun 20/912:35 -

1 stop12h 40m

Deal found 14/8£704

Thu 17/910:45 -

1 stop13h 15m

Mon 28/912:35 -

1 stop12h 40m

Deal found 11/8£705

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 16 August 2026.

Sun 24/108:05 -

1 stop35h 36m

Wed 3/217:21 -

1 stop36h 09m

Deal found 15/8£648

Thu 10/909:55 -

1 stop33h 07m

Sat 10/1014:40 -

2 stops23h 15m

Deal found 11/8£686

Thu 17/910:45 -

1 stop13h 15m

Mon 28/912:35 -

1 stop12h 40m

Deal found 12/8£705

Thu 24/916:20 -

2 stops26h 52m

Mon 28/915:32 -

1 stop16h 43m

Deal found 14/8£733

Fri 4/1213:00 -

2 stops55h 40m

Fri 18/1217:40 -

2 stops47h 20m

Deal found 16/8£880

Wed 30/911:55 -

1 stop32h 39m

Wed 7/1016:39 -

1 stop23h 06m

Deal found 16/8£685

Sun 13/911:10 -

1 stop12h 50m

Sun 20/912:35 -

1 stop12h 40m

Deal found 14/8£715

Tue 15/909:20 -

1 stop33h 52m

Mon 21/915:32 -

2 stops36h 18m

Deal found 13/8£734

Sun 20/908:15 -

1 stop36h 18m

Mon 28/916:39 -

1 stop23h 06m

Deal found 15/8£724

Mon 14/911:10 -

1 stop12h 50m

Tue 22/912:35 -

1 stop12h 40m

Deal found 13/8£732

Wed 16/916:20 -

2 stops26h 52m

Thu 24/915:32 -

2 stops23h 38m

Deal found 13/8£734

Thu 28/113:25 -

1 stop26h 40m

Mon 15/212:35 -

1 stop13h 15m

Deal found 11/8£733

Fri 18/909:40 -

2 stops33h 32m

Mon 28/915:32 -

1 stop16h 43m

Deal found 13/8£734

Fri 11/908:15 -

1 stop35h 49m

Fri 18/916:39 -

1 stop23h 06m

Deal found 14/8£763

Fri 4/1210:35 -

1 stop12h 25m

Mon 7/1209:10 -

1 stop16h 40m

Deal found 11/8£742

Wed 16/1210:35 -

1 stop29h 30m

Thu 17/1215:45 -

1 stop12h 45m

Deal found 12/8£743

Sat 29/815:15 -

1 stop27h 59m

Sat 19/915:32 -

1 stop16h 43m

Deal found 11/8£924

Thu 14/113:25 -

1 stop29h 50m

Sat 23/115:45 -

1 stop12h 45m

Deal found 11/8£777

Thu 10/910:45 -

1 stop13h 15m

Sat 10/1012:35 -

1 stop12h 40m

Deal found 11/8£800

Thu 24/910:45 -

1 stop33h 30m

Mon 28/912:35 -

1 stop12h 40m

Deal found 14/8£813

Sun 20/913:25 -

2 stops31h 08m

Mon 28/916:39 -

2 stops22h 41m

Deal found 15/8£816

Sun 24/113:25 -

1 stop26h 40m

Wed 3/212:35 -

1 stop13h 15m

Deal found 15/8£830

Sun 6/911:10 -

1 stop12h 50m

Tue 3/1115:45 -

1 stop12h 45m

Deal found 13/8£874

Fri 4/919:50 -

2 stops31h 20m

Tue 8/915:45 -

3 stops34h 00m

Deal found 15/8£1,042

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£618
One-way from	£387

JetBlue

JetBlue
18/9-28/9
2 total stops
58h 55m total
London to Saint Lucia

20/11

20/11
2 total stops
30h 30m 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

Sun 24/1

08:05-15:41

1 stop35h 36m

Castries Hewanorra

Wed 3/2

17:21-09:30

1 stop36h 09m

£648

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Wed 30/9

11:55-15:34

1 stop32h 39m

Castries Hewanorra

Wed 7/10

16:39-20:45

1 stop23h 06m

£685

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Thu 10/9

09:55-14:02

1 stop33h 07m

Castries Hewanorra

Sat 10/10

14:40-18:55

2 stops23h 15m

£686

LondonCastries

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

LHRSLU

London Heathrow

Thu 17/9

10:45-19:00

1 stop13h 15m

Castries George F. L. Charle

Mon 28/9

12:35-06:15

1 stop12h 40m

£705

Fastest return journey

LondonCastries

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

LHRSLU

London Heathrow

Sun 13/9

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Sun 20/9

12:35-06:15

1 stop12h 40m

£715

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sun 20/9

08:15-15:33

1 stop36h 18m

Castries Hewanorra

Mon 28/9

16:39-20:45

1 stop23h 06m

£724

LondonCastries

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

LHRSLU

London Heathrow

Mon 14/9

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Tue 22/9

12:35-06:15

1 stop12h 40m

£732

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Thu 24/9

16:20-14:12

2 stops26h 52m

Castries Hewanorra

Mon 28/9

15:32-13:15

1 stop16h 43m

£733

LondonCastries

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

LHRSLU

London Heathrow

Thu 28/1

13:25-12:05

1 stop26h 40m

Castries George F. L. Charle

Mon 15/2

12:35-05:50

1 stop13h 15m

£733

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Tue 15/9

09:20-14:12

1 stop33h 52m

Castries Hewanorra

Mon 21/9

15:32-08:50

2 stops36h 18m

£734

Flights are sorted by cheapest return flights first.

Deals found on 15/8

Showing 1-10 of 44 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 £1,203). 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?
JetBlue, American Airlines, and Delta can get you from London Heathrow Airport to Saint Lucia in just under 26h 52m. Your travel time can differ by up to 8h 44m. 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 £1,203). 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£497	Average£760	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£566	Average£874	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	Cheapest£655	Average£739	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Fly with Cheapflights

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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