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Cheap flights from London Heathrow Airport to Saint Lucia from £346

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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
30 Jun — 7 Jul1
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 31 May 2026.

Tue 17/1107:25
LHR
-
UVF
1 stop36h 44m
JetBlue
Tue 1/1216:57
UVF
-
LHR
1 stop24h 43m
JetBlue
Deal found 27/5£701
Thu 31/1212:55
LHR
-
UVF
2 stops30h 20m
Delta
Mon 18/116:25
UVF
-
LHR
2 stops34h 25m
Delta
Deal found 29/5£734
Fri 30/1015:50
LHR
-
UVF
1 stop26h 31m
Delta
Wed 11/1116:25
UVF
-
LHR
2 stops35h 40m
Delta
Deal found 28/5£735
Mon 24/817:40
LHR
-
UVF
1 stop25h 40m
Air Canada
Fri 11/915:15
UVF
-
LHR
1 stop15h 35m
Air Canada
Deal found 26/5£735
Thu 10/912:05
LHR
-
UVF
1 stop31h 10m
Air Canada
Fri 18/915:15
UVF
-
LHR
1 stop15h 35m
Air Canada
Deal found 29/5£741
Sat 31/1012:55
LHR
-
UVF
2 stops28h 26m
American Airlines
Thu 12/1116:50
UVF
-
LHR
1 stop14h 40m
American Airlines
Deal found 28/5£744
Fri 4/1217:00
LHR
-
UVF
1 stop23h 29m
American Airlines
Mon 14/1214:23
UVF
-
LHR
1 stop17h 07m
American Airlines
Deal found 29/5£746
Sun 1/1111:15
LHR
-
UVF
1 stop30h 06m
American Airlines
Fri 13/1116:04
UVF
-
LHR
1 stop15h 36m
American Airlines
Deal found 28/5£747
Tue 3/1111:15
LHR
-
UVF
1 stop32h 35m
American Airlines
Tue 17/1114:28
UVF
-
LHR
1 stop17h 02m
American Airlines
Deal found 31/5£749
Mon 7/1219:10
LHR
-
UVF
2 stops24h 43m
American Airlines
Mon 14/1214:23
UVF
-
LHR
1 stop17h 07m
American Airlines
Deal found 29/5£750
Thu 25/610:45
LHR
-
SLU
1 stop13h 15m
Multiple Airlines
Thu 2/712:35
SLU
-
LHR
1 stop12h 15m
Multiple Airlines
Deal found 28/5£814
Mon 24/811:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Fri 11/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 26/5£817

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 31 May 2026.

Round-trip from

£701

One-way from

£346

Popular in

August

Cheapest in

November

Average price

£896
JetBlue
  • JetBlue
  • 17/11-1/12
  • 2 total stops
  • 61h 27m total
  • London to Saint Lucia
Search Deals
10/6
  • 10/6
  • 3 total stops
  • 47h 20m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£161 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease (£52 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
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 31 May 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 - UVF

LHRUVF

London Heathrow

Fri 30/10

15:50-14:21

1 stop26h 31m

Castries Hewanorra

Mon 16/11

16:25-11:40

1 stop15h 15m

£735
Fastest return journey

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 24/8

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Fri 11/9

12:35-06:15

1 stop12h 40m

£817

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 15/6

09:35-18:55

1 stop14h 20m

Castries George F. L. Charle

Mon 22/6

16:20-09:20

1 stop12h 00m

£947

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 17/7

19:25-13:50

2 stops23h 25m

Castries Hewanorra

Tue 28/7

15:20-12:10

1 stop15h 50m

£982

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 28/7

18:05-14:20

2 stops25h 15m

Castries Hewanorra

Fri 28/8

15:14-12:10

1 stop15h 56m

£982

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 17/8

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Fri 21/8

12:35-06:15

1 stop12h 40m

£1,015

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 23/10

08:00-13:31

2 stops34h 31m

Castries Hewanorra

Sat 31/10

12:52-05:55

1 stop37h 03m

£1,017

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 7/7

20:10-13:50

2 stops22h 40m

Castries Hewanorra

Mon 20/7

15:20-18:55

2 stops22h 35m

£1,025

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 14/8

18:05-13:54

2 stops24h 49m

Castries Hewanorra

Fri 4/9

14:54-19:45

2 stops23h 51m

£1,027

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 16/8

17:55-14:14

2 stops25h 19m

Castries Hewanorra

Sat 22/8

15:34-10:20

2 stops37h 46m

£1,148

Flights are sorted by cheapest return flights first.

Deals found on 26/5

Showing 1-10 of 25 resultsSorted by cheapest first
1
2
3

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 £751). 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 31 May 2026.
Read reviews from past customers who have flown with KLM,Finnair, andJetBlue 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
1,524 reviews
Check prices

Entertainment

7.2

Boarding

7.8

Overall

7.8

Food

7.3

Crew

8.4

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,524 reviews
KLM
7.8
Good
1,524 reviews
Check prices

Entertainment

7.2

Boarding

7.8

Overall

7.8

Food

7.3

Crew

8.4

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Finnair
7.7
Good
1,401 reviews
KLM
7.8
Good
1,524 reviews
Check prices

Entertainment

7.2

Boarding

7.8

Overall

7.8

Food

7.3

Crew

8.4

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
JetBlue
7.2
Good
2,983 reviews
KLM
7.8
Good
1,524 reviews
Check prices

Entertainment

7.2

Boarding

7.8

Overall

7.8

Food

7.3

Crew

8.4

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Air Canada
7.1
Good
11,107 reviews
KLM
7.8
Good
1,524 reviews
Check prices

Entertainment

7.2

Boarding

7.8

Overall

7.8

Food

7.3

Crew

8.4

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
British Airways
6.7
Okay
8,013 reviews
KLM
7.8
Good
1,524 reviews
Check prices

Entertainment

7.2

Boarding

7.8

Overall

7.8

Food

7.3

Crew

8.4

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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?

    Delta, American Airlines, and United Airlines can get you from London Heathrow Airport to Saint Lucia in just under 23h 25m. Your travel time can differ by up to 11h 06m. 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 £751). 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 Montego Bay flights
Heathrow to Bridgetown flights
Heathrow to Kingston flights
Gatwick to Bridgetown flights
Stansted to Bridgetown flights
Heathrow to Punta Cana flights
Gatwick to Punta Cana flights
London City to Montego Bay flights
Stansted to Kingston flights
Stansted to Punta Cana flights
Luton to Montego Bay flights
Gatwick to Kingston flights
London City to Kingston flights
Heathrow to Nassau flights
Stansted to Montego Bay flights
London City to Bridgetown flights
Heathrow to St. George's flights
Heathrow to Castries flights
Heathrow to Port of Spain flights
Luton to Punta Cana flights
Gatwick to Montego Bay flights
London City to Punta Cana flights
Heathrow to Roseau flights
Heathrow to Willemstad flights
Heathrow to Santo Domingo flights
Heathrow to Luis Munoz Marin Intl flights
Gatwick to Havana flights
Gatwick to Willemstad flights
Gatwick to Castries flights
Stansted to Port of Spain flights
Gatwick to Santo Domingo flights
Gatwick to St. George's flights
Gatwick to Nassau flights
Gatwick to Luis Munoz Marin Intl flights
Heathrow to St. John's flights
Gatwick to St. John's flights
Stansted to Santo Domingo flights
Stansted to Nassau flights
Gatwick to Port of Spain flights
London City to Luis Munoz Marin Intl flights
Stansted to Luis Munoz Marin Intl flights
London City to Santo Domingo flights
Heathrow to Havana flights
Gatwick to Roseau flights
Heathrow to Castries flights
Heathrow to George Town flights
Heathrow to Pointe-à-Pitre flights
Heathrow to Kingstown flights

Top 6 airlines flying from Heathrow to Saint Lucia

Discover the top 6 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 31 May 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£500Average£849FlexibilityNo cancel feeOn-time70%
Search British Airways flights
JetBlueCheapest£533Average£833FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Air CanadaCheapest£634Average£776FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£691Average£907FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£706Average£959FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£1,156Average£1,537FlexibilityNo 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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