£424+ 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 26 June 2026.

Tue 8/911:10

LHR

-

SLU

1 stop12h 50m

Multiple Airlines

Thu 24/912:35

SLU

-

LHR

1 stop12h 15m

Multiple Airlines

Deal found 21/6£664

Thu 19/1115:00

LHR

-

UVF

1 stop29h 25m

Air Canada

Sun 29/1117:25

UVF

-

LHR

2 stops23h 10m

Air Canada

Deal found 22/6£668

Thu 1/1010:45

LHR

-

SLU

1 stop13h 15m

Multiple Airlines

Wed 21/1012:35

SLU

-

LHR

1 stop12h 40m

Multiple Airlines

Deal found 25/6£673

Mon 9/1113:20

LHR

-

SLU

1 stop29h 55m

Multiple Airlines

Mon 16/1115:45

SLU

-

LHR

1 stop12h 45m

Multiple Airlines

Deal found 25/6£674

Sun 23/811:10

LHR

-

SLU

1 stop12h 50m

Multiple Airlines

Sun 6/912:35

SLU

-

LHR

1 stop12h 40m

Multiple Airlines

Deal found 25/6£678

Mon 28/1219:10

LHR

-

UVF

2 stops22h 56m

American Airlines

Mon 11/116:05

UVF

-

LHR

2 stops22h 55m

American Airlines

Deal found 25/6£683

Wed 5/809:15

LHR

-

UVF

1 stop34h 04m

American Airlines

Sat 22/815:19

UVF

-

LHR

1 stop15h 51m

American Airlines

Deal found 24/6£684

Mon 21/919:25

LHR

-

UVF

2 stops23h 29m

American Airlines

Wed 7/1014:20

UVF

-

LHR

1 stop17h 15m

American Airlines

Deal found 26/6£685

Fri 11/1213:10

LHR

-

UVF

2 stops28h 09m

American Airlines

Wed 23/1216:54

UVF

-

LHR

2 stops34h 56m

American Airlines

Deal found 24/6£686

Thu 16/712:00

LHR

-

UVF

1 stop31h 20m

American Airlines

Sun 26/715:20

UVF

-

LHR

1 stop36h 45m

American Airlines

Deal found 23/6£686

Tue 30/615:00

LHR

-

UVF

1 stop28h 16m

American Airlines

Mon 6/715:20

UVF

-

LHR

1 stop15h 50m

American Airlines

Deal found 25/6£687

Sun 28/612:00

LHR

-

UVF

1 stop31h 16m

American Airlines

Fri 10/715:20

UVF

-

LHR

1 stop15h 50m

American Airlines

Deal found 26/6£688

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 26 June 2026.

Tue 8/911:10

LHR

-

SLU

1 stop12h 50m

Multiple Airlines

Thu 24/912:35

SLU

-

LHR

1 stop12h 15m

Multiple Airlines

Deal found 21/6£664

Mon 9/1109:40

LHR

-

UVF

2 stops33h 30m

Delta

Mon 16/1116:25

UVF

-

LHR

1 stop15h 15m

Delta

Deal found 25/6£737

Thu 10/910:45

LHR

-

SLU

1 stop13h 15m

Multiple Airlines

Thu 24/912:35

SLU

-

LHR

1 stop12h 15m

Multiple Airlines

Deal found 21/6£664

Sun 23/809:20

LHR

-

UVF

1 stop33h 54m

Delta

Wed 9/915:32

UVF

-

LHR

2 stops23h 38m

Delta

Deal found 25/6£737

Mon 9/1113:20

LHR

-

SLU

1 stop29h 55m

Multiple Airlines

Mon 16/1115:45

SLU

-

LHR

1 stop12h 45m

Multiple Airlines

Deal found 25/6£674

Fri 21/811:45

LHR

-

UVF

2 stops31h 29m

Delta

Wed 9/915:32

UVF

-

LHR

2 stops23h 38m

Delta

Deal found 25/6£737

Sat 29/815:15

LHR

-

UVF

1 stop27h 59m

Delta

Tue 8/915:32

UVF

-

LHR

1 stop16h 43m

Delta

Deal found 26/6£739

Mon 31/811:45

LHR

-

UVF

2 stops31h 29m

Delta

Wed 9/915:32

UVF

-

LHR

2 stops23h 38m

Delta

Deal found 26/6£739

Wed 9/915:15

LHR

-

UVF

1 stop27h 57m

Delta

Thu 24/915:32

UVF

-

LHR

1 stop33h 53m

Delta

Deal found 21/6£741

Fri 24/711:10

LHR

-

SLU

1 stop12h 50m

Multiple Airlines

Tue 4/812:35

SLU

-

LHR

1 stop12h 40m

Multiple Airlines

Deal found 21/6£897

Mon 17/809:40

LHR

-

UVF

2 stops33h 34m

Delta

Mon 24/815:34

UVF

-

LHR

1 stop16h 41m

Delta

Deal found 23/6£741

Tue 8/912:50

LHR

-

UVF

2 stops30h 22m

Delta

Thu 24/915:32

UVF

-

LHR

2 stops33h 48m

Delta

Deal found 21/6£741

Wed 9/913:05

LHR

-

SLU

3 stops29h 05m

Multiple Airlines

Thu 17/917:50

SLU

-

LHR

2 stops34h 00m

Multiple Airlines

Deal found 25/6£1,046

Tue 6/1012:40

LHR

-

SLU

3 stops35h 20m

Multiple Airlines

Fri 16/1018:00

SLU

-

LHR

2 stops21h 10m

Multiple Airlines

Deal found 23/6£1,122

Sun 4/1013:05

LHR

-

SLU

3 stops32h 00m

Multiple Airlines

Fri 16/1018:00

SLU

-

LHR

2 stops21h 10m

Multiple Airlines

Deal found 24/6£1,142

Thu 1/1010:45

LHR

-

SLU

1 stop13h 15m

Multiple Airlines

Wed 21/1010:15

SLU

-

LHR

2 stops28h 55m

Multiple Airlines

Deal found 25/6£1,173

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£668
One-way from	£424

Air Canada

Air Canada
19/11-29/11
3 total stops
52h 35m total
London to Saint Lucia

American Airlines

American Airlines
5/7
1 total stop
31h 20m 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

Fastest return journey

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 8/9

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Thu 24/9

12:35-05:50

1 stop12h 15m

£664

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 10/9

10:45-19:00

1 stop13h 15m

Castries George F. L. Charle

Thu 24/9

12:35-05:50

1 stop12h 15m

£664

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 9/11

13:20-15:15

1 stop29h 55m

Castries George F. L. Charle

Mon 16/11

15:45-08:30

1 stop12h 45m

£674

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 9/11

09:40-15:10

2 stops33h 30m

Castries Hewanorra

Mon 16/11

16:25-11:40

1 stop15h 15m

£737

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 23/8

09:20-14:14

1 stop33h 54m

Castries Hewanorra

Wed 9/9

15:32-20:10

2 stops23h 38m

£737

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 21/8

11:45-14:14

2 stops31h 29m

Castries Hewanorra

Wed 9/9

15:32-20:10

2 stops23h 38m

£737

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sat 29/8

15:15-14:14

1 stop27h 59m

Castries Hewanorra

Tue 8/9

15:32-13:15

1 stop16h 43m

£739

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 31/8

11:45-14:14

2 stops31h 29m

Castries Hewanorra

Wed 9/9

15:32-20:10

2 stops23h 38m

£739

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 9/9

15:15-14:12

1 stop27h 57m

Castries Hewanorra

Thu 24/9

15:32-06:25

1 stop33h 53m

£741

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 17/8

09:40-14:14

2 stops33h 34m

Castries Hewanorra

Mon 24/8

15:34-13:15

1 stop16h 41m

£741

Flights are sorted by cheapest return flights first.

Deals found on 23/6

Showing 1-10 of 31 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-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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £502). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £810). 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 KLM,Finnair, andAir Canada 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.

7.8

Good

Reviews

1 / 20

10.0

Excellent

Bobby,Sept 2025

EDI - ATL

Food was above average but could be better, The flight was operated by Delta and was excellent

7.8

Good

7.8

Good

Reviews

1 / 20

10.0

Excellent

Bobby,Sept 2025

EDI - ATL

Food was above average but could be better, The flight was operated by Delta and was excellent

7.6

Good

7.8

Good

Reviews

1 / 20

10.0

Excellent

Bobby,Sept 2025

EDI - ATL

Food was above average but could be better, The flight was operated by Delta and was excellent

7.1

Good

7.8

Good

Reviews

1 / 20

10.0

Excellent

Bobby,Sept 2025

EDI - ATL

Food was above average but could be better, The flight was operated by Delta and was excellent

7.1

Good

7.8

Good

Reviews

1 / 20

10.0

Excellent

Bobby,Sept 2025

EDI - ATL

Food was above average but could be better, The flight was operated by Delta and was excellent

British Airways

6.7

Okay

7.8

Good

Reviews

1 / 20

10.0

Excellent

Bobby,Sept 2025

EDI - ATL

Food was above average but could be better, The flight was operated by Delta and was excellent

Related info for your journey

How long is the flight from London Heathrow Airport to Saint Lucia?
Delta can get you from London Heathrow Airport to Saint Lucia in just under 33h 30m. Your travel time can differ by up to . The distance between London Heathrow Airport and Saint Lucia is about 4217 mi.
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 £502). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £810). 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 6 airlines flying from Heathrow to Saint Lucia

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£510	Average£810	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
JetBlue	Cheapest£544	Average£851	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Air Canada	Cheapest£647	Average£792	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Finnair	Cheapest£705	Average£926	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£721	Average£979	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
KLM	Cheapest£1,180	Average£1,623	FlexibilityNo cancel fee	On-time75%	Search KLM 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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