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Cheap flights from London Heathrow Airport to Saint Lucia from £366

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 16/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
10 May — 17 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 10 April 2026.

Tue 10/1112:20
LHR
-
UVF
1 stop31h 49m
JetBlue
Thu 26/1117:01
UVF
-
LHR
1 stop23h 44m
JetBlue
Deal found 9/4£625
Mon 2/1112:20
LHR
-
UVF
1 stop31h 49m
JetBlue
Mon 16/1117:15
UVF
-
LHR
1 stop23h 30m
JetBlue
Deal found 5/4£684
Thu 29/1007:25
LHR
-
UVF
1 stop35h 49m
JetBlue
Sat 14/1117:15
UVF
-
LHR
1 stop36h 15m
JetBlue
Deal found 7/4£710
Thu 11/607:25
LHR
-
UVF
2 stops35h 45m
Multiple Airlines
Fri 19/615:05
UVF
-
LHR
1 stop15h 45m
Multiple Airlines
Deal found 7/4£714
Mon 7/1212:20
LHR
-
UVF
1 stop30h 37m
JetBlue
Mon 14/1216:57
UVF
-
LHR
1 stop24h 43m
JetBlue
Deal found 6/4£719
Wed 8/417:40
LHR
-
UVF
1 stop26h 45m
Air Canada
Wed 15/416:20
UVF
-
LHR
1 stop35h 15m
Air Canada
Deal found 5/4£719
Fri 17/413:25
LHR
-
UVF
1 stop29h 37m
Multiple Airlines
Thu 30/415:22
UVF
-
LHR
2 stops36h 28m
Multiple Airlines
Deal found 6/4£723
Thu 31/1212:55
LHR
-
UVF
2 stops30h 20m
Delta
Fri 8/116:25
UVF
-
LHR
2 stops35h 25m
Delta
Deal found 6/4£726
Wed 8/409:30
LHR
-
UVF
2 stops34h 55m
Lufthansa
Wed 15/416:20
UVF
-
LHR
2 stops33h 10m
Lufthansa
Deal found 5/4£727
Thu 31/1212:55
LHR
-
UVF
2 stops30h 20m
Delta
Fri 15/116:25
UVF
-
LHR
2 stops35h 40m
Delta
Deal found 7/4£728
Mon 14/911:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Sat 19/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 5/4£789
Mon 7/911:10
LHR
-
SLU
1 stop29h 55m
Multiple Airlines
Mon 21/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 7/4£824

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 10 April 2026.

Round-trip from

£713

One-way from

£366

Popular in

August

Cheapest in

November
JetBlue
  • JetBlue
  • 4/6-17/11
  • 2 total stops
  • 72h 35m total
  • London to Saint Lucia
Search Deals
16/6
  • 16/6
  • 2 total stops
  • 45h 30m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£127 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease (£56 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 10 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

Tue 1/9

18:55-14:08

2 stops24h 13m

Castries Hewanorra

Mon 14/9

15:38-13:15

1 stop16h 37m

£727

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 20/4

15:15-14:02

1 stop27h 47m

Castries Hewanorra

Fri 24/4

15:22-06:25

1 stop34h 03m

£737
Fastest return journey

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 18/8

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Sun 6/9

12:35-06:15

1 stop12h 40m

£850

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 15/6

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Mon 22/6

12:35-06:15

1 stop12h 40m

£879

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 3/5

20:05-14:02

2 stops46h 57m

Castries Hewanorra

Tue 2/6

15:25-13:15

1 stop16h 50m

£880

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 11/5

09:40-14:05

2 stops33h 25m

Castries Hewanorra

Thu 21/5

15:25-13:15

1 stop16h 50m

£894

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 11/6

10:45-19:00

1 stop13h 15m

Castries George F. L. Charle

Thu 18/6

12:35-05:50

1 stop12h 15m

£916

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 28/4

11:45-14:02

2 stops31h 17m

Castries Hewanorra

Sun 3/5

15:22-13:15

1 stop16h 53m

£954

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 5/5

11:20-09:30

2 stops27h 10m

Castries George F. L. Charle

Tue 12/5

19:10-07:15

3 stops31h 05m

£963

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 28/4

11:20-09:30

2 stops27h 10m

Castries George F. L. Charle

Tue 12/5

14:30-20:10

2 stops24h 40m

£1,003

Flights are sorted by cheapest return flights first.

Deals found on 7/4

Showing 1-10 of 40 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 £502). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £786). 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 7% of weekly flights between London and Saint Lucia have experienced delays in the past year, with the average delay time being 115 minutes.

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

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning 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.

Which airline has the best punctuality record on London to Saint Lucia flights?

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 7% of flights being delayed.

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 10 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
7.7
Good
1,493 reviews
Check prices

Food

7.3

Boarding

7.8

Overall

7.7

Entertainment

7.1

Crew

8.4

Comfort

7.6

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
7.7
Good
1,493 reviews
KLM
7.7
Good
1,493 reviews
Check prices

Food

7.3

Boarding

7.8

Overall

7.7

Entertainment

7.1

Crew

8.4

Comfort

7.6

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
1,383 reviews
KLM
7.7
Good
1,493 reviews
Check prices

Food

7.3

Boarding

7.8

Overall

7.7

Entertainment

7.1

Crew

8.4

Comfort

7.6

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
2,928 reviews
KLM
7.7
Good
1,493 reviews
Check prices

Food

7.3

Boarding

7.8

Overall

7.7

Entertainment

7.1

Crew

8.4

Comfort

7.6

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
10,915 reviews
KLM
7.7
Good
1,493 reviews
Check prices

Food

7.3

Boarding

7.8

Overall

7.7

Entertainment

7.1

Crew

8.4

Comfort

7.6

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
7,871 reviews
KLM
7.7
Good
1,493 reviews
Check prices

Food

7.3

Boarding

7.8

Overall

7.7

Entertainment

7.1

Crew

8.4

Comfort

7.6

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 can get you from London Heathrow Airport to Saint Lucia in just under 24h 13m. 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, May 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 December is currently the most expensive (average of £786). 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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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 Port of Spain flights
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London City to Castries flights
Heathrow to Santiago de los Caballeros flights
Stansted to Nassau flights
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Stansted to Port of Spain flights
Gatwick to Oranjestad flights
Heathrow to Castries flights
London City to Santo Domingo flights
Stansted to Santo Domingo flights
London City to Oranjestad flights
Heathrow to Simpson Bay flights
Gatwick to Kingstown flights
Heathrow to Luis Munoz Marin Intl flights
Heathrow to Roseau 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 10 April 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£504Average£852FlexibilityNo cancel feeOn-time70%
Search British Airways flights
JetBlueCheapest£534Average£836FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Air CanadaCheapest£636Average£745FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£693Average£910FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£709Average£963FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£1,160Average£1,504FlexibilityNo 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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