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Cheap flights from London Heathrow Airport to Saint Lucia from £406

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 31/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
15 Aug — 22 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Saint Lucia

Enter your travel dates to find the best prices.

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 July 2026.

Thu 3/910:45
LHR
-
SLU
1 stop13h 15m
Multiple Airlines
Fri 11/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 14/7£602
Thu 5/1118:00
LHR
-
UVF
2 stops25h 50m
British Airways
Thu 12/1116:04
UVF
-
LHR
2 stops33h 46m
British Airways
Deal found 15/7£676
Fri 7/818:05
LHR
-
UVF
2 stops25h 14m
American Airlines
Sun 16/815:29
UVF
-
LHR
2 stops34h 21m
American Airlines
Deal found 15/7£679
Tue 1/912:15
LHR
-
UVF
1 stop30h 34m
American Airlines
Tue 15/915:02
UVF
-
LHR
2 stops25h 38m
American Airlines
Deal found 14/7£679
Tue 27/1013:25
LHR
-
SLU
1 stop29h 50m
Multiple Airlines
Tue 22/1215:45
SLU
-
LHR
1 stop12h 45m
Multiple Airlines
Deal found 13/7£680
Thu 6/815:00
LHR
-
UVF
1 stop28h 19m
American Airlines
Tue 25/814:49
UVF
-
LHR
2 stops25h 51m
American Airlines
Deal found 13/7£680
Thu 8/1017:35
LHR
-
UVF
2 stops25h 25m
American Airlines
Tue 20/1015:01
UVF
-
LHR
1 stop16h 34m
American Airlines
Deal found 16/7£681
Tue 21/712:00
LHR
-
UVF
1 stop31h 20m
American Airlines
Tue 4/815:20
UVF
-
LHR
1 stop15h 50m
American Airlines
Deal found 14/7£682
Mon 3/813:00
LHR
-
UVF
2 stops29h 50m
American Airlines
Tue 24/1116:50
UVF
-
LHR
2 stops33h 55m
American Airlines
Deal found 14/7£682
Fri 7/815:00
LHR
-
UVF
1 stop28h 19m
British Airways
Sun 16/815:29
UVF
-
LHR
1 stop34h 26m
British Airways
Deal found 15/7£684
Thu 17/1210:35
LHR
-
SLU
1 stop12h 25m
Multiple Airlines
Wed 23/1212:35
SLU
-
LHR
1 stop13h 15m
Multiple Airlines
Deal found 12/7£684
Thu 27/812:15
LHR
-
UVF
1 stop30h 34m
American Airlines
Thu 3/915:19
UVF
-
LHR
1 stop15h 51m
American Airlines
Deal found 12/7£684

Find flight deals from Heathrow to Saint Lucia

Keep the following information in mind while searching for Heathrow to Saint Lucia flight deals. Data was last updated 16 July 2026.

Round-trip from

£602

One-way from

£406
3/9-11/9
  • 3/9-11/9
  • 2 total stops
  • 25h 55m total
  • London to Saint Lucia
Search Deals
31/8
  • 31/8
  • 3 total stops
  • 37h 05m total
  • London to Saint Lucia
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Saint Lucia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 16 July 2026.
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 - SLU

LHRSLU

London Heathrow

Tue 27/10

13:25-15:15

1 stop29h 50m

Castries George F. L. Charle

Tue 22/12

15:45-08:30

1 stop12h 45m

£680

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 7/12

09:55-15:02

1 stop33h 07m

Castries Hewanorra

Mon 14/12

14:23-11:30

1 stop17h 07m

£684

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 4/9

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Fri 11/9

12:35-06:15

1 stop12h 40m

£695

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 20/9

12:50-14:12

2 stops54h 22m

Castries Hewanorra

Thu 1/10

15:32-13:15

1 stop16h 43m

£732

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 2/9

15:15-14:14

1 stop27h 59m

Castries Hewanorra

Fri 11/9

15:32-13:15

1 stop16h 43m

£732
Fastest return journey

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 4/1

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Sun 31/1

15:45-08:30

1 stop12h 45m

£745

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 4/1

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Sun 24/1

15:45-08:30

1 stop12h 45m

£745

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 13/8

10:45-12:05

1 stop30h 20m

Castries George F. L. Charle

Thu 10/9

12:35-05:50

1 stop12h 15m

£755

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 1/10

10:45-19:00

1 stop13h 15m

Castries George F. L. Charle

Mon 12/10

12:35-06:15

1 stop12h 40m

£762

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 7/12

09:00-16:40

2 stops59h 40m

Castries Hewanorra

Mon 14/12

17:40-21:00

2 stops23h 20m

£769

Flights are sorted by cheapest return flights first.

Deals found on 13/7

Showing 1-10 of 37 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.
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

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 £492). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £794). 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

Get insights into the airlines that provide service to Saint Lucia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Saint Lucia. Reviews last updated 16 July 2026.
Read reviews from past customers who have flown with KLM,American Airlines, 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.
KLM
7.8
Good
1,539 reviews
Check prices

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Entertainment

7.2

Comfort

7.7

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
KLM
7.8
Good
1,539 reviews
KLM
7.8
Good
1,539 reviews
Check prices

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Entertainment

7.2

Comfort

7.7

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
American Airlines
7.1
Good
11,815 reviews
KLM
7.8
Good
1,539 reviews
Check prices

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Entertainment

7.2

Comfort

7.7

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
Air Canada
7.1
Good
11,347 reviews
KLM
7.8
Good
1,539 reviews
Check prices

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Entertainment

7.2

Comfort

7.7

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
JetBlue
7.1
Good
3,010 reviews
KLM
7.8
Good
1,539 reviews
Check prices

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Entertainment

7.2

Comfort

7.7

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
8,121 reviews
KLM
7.8
Good
1,539 reviews
Check prices

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Entertainment

7.2

Comfort

7.7

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

Find useful and relevant information for your journey from Heathrow to Saint Lucia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London Heathrow Airport to Saint Lucia?

    American Airlines, Delta, and Air Canada can get you from London Heathrow Airport to Saint Lucia in just under 33h 07m. Your travel time can differ by up to 26h 33m. 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 £492). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £794). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Heathrow to Saint Lucia

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Bridgetown flights
Heathrow to Montego Bay flights
Gatwick to Bridgetown flights
Heathrow to Kingston flights
London City to Montego Bay flights
Heathrow to Castries flights
Heathrow to Punta Cana flights
Stansted to Montego Bay flights
Gatwick to Kingston flights
Gatwick to Castries flights
Gatwick to Punta Cana flights
Stansted to Bridgetown flights
London City to Bridgetown flights
London City to Kingston flights
Stansted to Kingston flights
Heathrow to Port of Spain flights
Stansted to Punta Cana flights
Heathrow to Nassau flights
Gatwick to Montego Bay flights
Heathrow to St. George's flights
Luton to Montego Bay flights
Luton to Punta Cana flights
London City to Castries flights
Gatwick to St. John's flights
Heathrow to Santo Domingo flights
Heathrow to Kingstown flights
London City to Punta Cana flights
Heathrow to Castries flights
Gatwick to Santo Domingo flights
Heathrow to St. John's flights
Gatwick to Port of Spain flights
Stansted to Santo Domingo flights
Heathrow to Luis Munoz Marin Intl flights
Gatwick to Nassau flights
Stansted to Port of Spain flights
Gatwick to St. George's flights
Gatwick to Havana flights
Gatwick to Castries flights
Heathrow to Roseau flights
Gatwick to Luis Munoz Marin Intl flights
Heathrow to Willemstad flights
Gatwick to Willemstad flights
London City to Santo Domingo flights
Heathrow to Simpson Bay flights
Stansted to Nassau flights
Gatwick to Kingstown flights
Stansted to Luis Munoz Marin Intl flights
Heathrow to Road Town flights

Top 5 airlines flying from Heathrow to Saint Lucia

Discover the top 5 airlines that operate flights from Heathrow to Saint Lucia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 16 July 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£500Average£764FlexibilityNo cancel feeOn-time70%
Search British Airways flights
JetBlueCheapest£533Average£834FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
American AirlinesCheapest£570Average£879FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapest£635Average£777FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
KLMCheapest£1,157Average£1,591FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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