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Cheap flights from London Heathrow Airport to Saint Lucia from £383

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 15/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
15 May — 22 May1
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 15 April 2026.

Mon 9/1107:25
LHR
-
UVF
1 stop36h 44m
JetBlue
Tue 1/1216:57
UVF
-
LHR
1 stop24h 43m
JetBlue
Deal found 11/4£613
Wed 27/508:15
LHR
-
UVF
1 stop36h 20m
JetBlue
Wed 3/614:10
UVF
-
LHR
1 stop25h 35m
JetBlue
Deal found 12/4£663
Mon 7/1208:05
LHR
-
UVF
1 stop34h 52m
JetBlue
Mon 14/1216:57
UVF
-
LHR
1 stop24h 43m
JetBlue
Deal found 11/4£724
Tue 21/411:45
LHR
-
UVF
2 stops31h 17m
Delta
Wed 6/515:22
UVF
-
LHR
2 stops23h 48m
Delta
Deal found 14/4£731
Thu 29/1015:50
LHR
-
UVF
1 stop26h 36m
Delta
Sun 8/1116:41
UVF
-
LHR
1 stop36h 19m
Delta
Deal found 13/4£731
Sat 31/1007:25
LHR
-
UVF
1 stop36h 44m
JetBlue
Mon 9/1117:15
UVF
-
LHR
1 stop36h 15m
JetBlue
Deal found 14/4£734
Fri 30/1019:05
LHR
-
UVF
2 stops24h 25m
American Airlines
Mon 9/1116:50
UVF
-
LHR
2 stops22h 10m
American Airlines
Deal found 13/4£740
Thu 10/912:15
LHR
-
UVF
1 stop30h 35m
American Airlines
Thu 24/916:00
UVF
-
LHR
1 stop15h 35m
American Airlines
Deal found 10/4£742
Mon 7/1214:30
LHR
-
UVF
1 stop26h 49m
American Airlines
Mon 14/1214:23
UVF
-
LHR
1 stop17h 07m
American Airlines
Deal found 13/4£742
Thu 24/910:45
LHR
-
SLU
1 stop13h 15m
Multiple Airlines
Fri 25/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 15/4£846
Tue 16/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Mon 6/712:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 12/4£863
Wed 3/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Tue 16/612:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 15/4£889

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 15 April 2026.

Round-trip from

£663

One-way from

£383

Popular in

August

Cheapest in

November
JetBlue
  • JetBlue
  • 27/5-3/6
  • 2 total stops
  • 61h 55m total
  • London to Saint Lucia
Search Deals
15/5
  • 15/5
  • 3 total stops
  • 45h 30m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£111 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease (£54 potential savings vs. average return price).
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 15 April 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

Sat 16/5

10:45-14:05

2 stops32h 20m

Castries Hewanorra

Tue 9/6

15:33-12:35

2 stops40h 02m

£759

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 11/6

10:45-19:00

1 stop13h 15m

Castries George F. L. Charle

Fri 19/6

12:35-06:15

1 stop12h 40m

£923

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 30/5

10:20-14:35

3 stops33h 15m

Castries George F. L. Charle

Tue 2/6

19:10-09:35

3 stops33h 25m

£935

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 6/9

08:40-14:08

2 stops34h 28m

Castries Hewanorra

Sun 20/9

15:38-13:15

1 stop16h 37m

£948
Fastest return journey

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 13/6

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Tue 14/7

12:35-06:15

1 stop12h 40m

£979

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 2/7

19:25-14:14

2 stops23h 49m

Castries Hewanorra

Thu 13/8

15:29-12:50

1 stop16h 21m

£1,075

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 26/5

16:20-14:05

2 stops26h 45m

Castries Hewanorra

Tue 2/6

15:25-13:15

1 stop16h 50m

£1,091

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 18/5

09:20-14:05

1 stop33h 45m

Castries Hewanorra

Thu 4/6

15:25-13:15

1 stop16h 50m

£1,127

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 10/5

16:45-14:28

2 stops50h 43m

Castries Hewanorra

Wed 20/5

15:48-21:05

2 stops24h 17m

£1,140

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 12/5

20:05-19:00

3 stops27h 55m

Castries George F. L. Charle

Sat 16/5

17:50-20:10

2 stops21h 20m

£1,145

Flights are sorted by cheapest return flights first.

Deals found on 13/4

Showing 1-10 of 35 resultsSorted by cheapest first
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3
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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, 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 £779). 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.

How often are flights from London to Saint Lucia delayed?

About 0% of weekly flights between London and Saint Lucia have experienced delays in the past year, with the average delay time being 0 minutes.

What is the most punctual flight time for London to Saint Lucia flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Wednesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

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 15 April 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
1,499 reviews
Check prices

Food

7.3

Overall

7.8

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.8
Good
1,499 reviews
KLM
7.8
Good
1,499 reviews
Check prices

Food

7.3

Overall

7.8

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Finnair
7.7
Good
1,387 reviews
KLM
7.8
Good
1,499 reviews
Check prices

Food

7.3

Overall

7.8

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
JetBlue
7.2
Good
2,936 reviews
KLM
7.8
Good
1,499 reviews
Check prices

Food

7.3

Overall

7.8

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Air Canada
7.1
Good
10,930 reviews
KLM
7.8
Good
1,499 reviews
Check prices

Food

7.3

Overall

7.8

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6.7
Okay
7,888 reviews
KLM
7.8
Good
1,499 reviews
Check prices

Food

7.3

Overall

7.8

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 and American Airlines can get you from London Heathrow Airport to Saint Lucia in just under 23h 49m. Your travel time can differ by up to 8h 31m. 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 £779). 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.
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Heathrow to Luis Munoz Marin Intl flights
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Gatwick to Luis Munoz Marin Intl flights
Gatwick to Basseterre flights
London City to Oranjestad flights
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Stansted to Port of Spain flights
Stansted to Luis Munoz Marin Intl 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 15 April 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£499Average£843FlexibilityNo cancel feeOn-time70%
Search British Airways flights
JetBlueCheapest£529Average£828FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Air CanadaCheapest£630Average£738FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£686Average£901FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£1,149Average£1,489FlexibilityNo 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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