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Cheap flights from London Heathrow Airport to Saint Lucia from £335

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 19/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
3 May — 10 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 3 April 2026.

Wed 30/908:15
LHR
-
UVF
1 stop36h 05m
JetBlue
Wed 7/1016:25
UVF
-
LHR
1 stop36h 05m
JetBlue
Deal found 29/3£698
Mon 7/1208:05
LHR
-
UVF
1 stop34h 52m
JetBlue
Mon 14/1216:57
UVF
-
LHR
1 stop24h 43m
JetBlue
Deal found 1/4£721
Tue 1/1212:20
LHR
-
UVF
1 stop30h 37m
JetBlue
Tue 8/1216:57
UVF
-
LHR
1 stop24h 43m
JetBlue
Deal found 2/4£726
Mon 23/1110:45
LHR
-
UVF
1 stop32h 25m
Delta
Sat 5/1216:25
UVF
-
LHR
1 stop34h 00m
Delta
Deal found 31/3£737
Wed 11/1115:50
LHR
-
UVF
1 stop27h 20m
Delta
Wed 25/1116:25
UVF
-
LHR
1 stop34h 00m
Delta
Deal found 29/3£739
Sat 7/1115:50
LHR
-
UVF
1 stop27h 36m
Delta
Thu 12/1116:25
UVF
-
LHR
2 stops34h 25m
Delta
Deal found 30/3£741
Mon 6/418:35
LHR
-
UVF
2 stops48h 23m
Delta
Tue 14/415:22
UVF
-
LHR
2 stops34h 48m
Delta
Deal found 29/3£745
Tue 13/1016:35
LHR
-
UVF
2 stops25h 50m
American Airlines
Sat 24/1016:20
UVF
-
LHR
1 stop15h 30m
American Airlines
Deal found 29/3£748
Wed 11/1113:25
LHR
-
SLU
1 stop26h 40m
Multiple Airlines
Thu 26/1115:45
SLU
-
LHR
1 stop12h 45m
Multiple Airlines
Deal found 29/3£749
Mon 2/1119:05
LHR
-
UVF
2 stops23h 55m
American Airlines
Thu 12/1116:50
UVF
-
LHR
2 stops22h 10m
American Airlines
Deal found 30/3£750
Wed 30/915:35
LHR
-
UVF
1 stop27h 15m
American Airlines
Wed 7/1016:20
UVF
-
LHR
1 stop14h 50m
American Airlines
Deal found 30/3£751
Fri 4/1217:00
LHR
-
UVF
1 stop23h 29m
American Airlines
Tue 8/1216:53
UVF
-
LHR
1 stop15h 12m
American Airlines
Deal found 30/3£751

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 3 April 2026.

Round-trip from

£737

One-way from

£335

Popular in

April

Cheapest in

November

Average price

£2,063
Delta
  • Delta
  • 19/4-7/5
  • 3 total stops
  • 64h 12m total
  • London to Saint Lucia
Search Deals
19/4
  • 19/4
  • 2 total stops
  • 45h 36m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 39% potential increase in price (£412 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 17% potential price decrease (£93 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 3 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

Fri 17/4

12:40-15:20

2 stops55h 40m

Castries Hewanorra

Thu 30/4

16:15-08:35

1 stop35h 20m

£816

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 17/4

12:30-13:09

1 stop29h 39m

Castries Hewanorra

Thu 30/4

14:45-12:35

1 stop16h 50m

£881

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 20/4

11:45-14:02

2 stops31h 17m

Castries Hewanorra

Mon 27/4

15:22-11:20

1 stop14h 58m

£894

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 17/4

18:35-22:10

2 stops32h 35m

Castries George F. L. Charle

Thu 30/4

17:50-20:10

2 stops21h 20m

£940

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 27/4

15:50-15:35

3 stops28h 45m

Castries George F. L. Charle

Wed 6/5

10:15-20:10

3 stops28h 55m

£971

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 16/4

11:45-14:02

2 stops31h 17m

Castries Hewanorra

Sun 19/4

15:22-11:20

1 stop14h 58m

£974

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sat 16/5

16:20-14:05

2 stops26h 45m

Castries Hewanorra

Sat 23/5

15:30-20:10

2 stops23h 40m

£1,018

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 17/9

09:35-19:00

1 stop14h 25m

Castries George F. L. Charle

Tue 22/9

16:20-09:20

1 stop12h 00m

£1,027

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 21/4

17:40-19:00

2 stops30h 20m

Castries George F. L. Charle

Thu 7/5

09:50-21:00

3 stops30h 10m

£1,045

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 15/5

19:50-22:10

2 stops31h 20m

Castries George F. L. Charle

Sat 23/5

17:50-20:10

2 stops21h 20m

£1,045

Flights are sorted by cheapest return flights first.

Deals found on 1/4

Showing 1-10 of 36 resultsSorted by cheapest first
1
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3
4

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, November is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £500). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £803). 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 3 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
1,485 reviews
Check prices

Crew

8.4

Boarding

7.8

Comfort

7.6

Overall

7.7

Entertainment

7.1

Food

7.3

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
1,485 reviews
KLM
7.7
Good
1,485 reviews
Check prices

Crew

8.4

Boarding

7.8

Comfort

7.6

Overall

7.7

Entertainment

7.1

Food

7.3

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
1,376 reviews
KLM
7.7
Good
1,485 reviews
Check prices

Crew

8.4

Boarding

7.8

Comfort

7.6

Overall

7.7

Entertainment

7.1

Food

7.3

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
2,913 reviews
KLM
7.7
Good
1,485 reviews
Check prices

Crew

8.4

Boarding

7.8

Comfort

7.6

Overall

7.7

Entertainment

7.1

Food

7.3

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
10,886 reviews
KLM
7.7
Good
1,485 reviews
Check prices

Crew

8.4

Boarding

7.8

Comfort

7.6

Overall

7.7

Entertainment

7.1

Food

7.3

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
7,848 reviews
KLM
7.7
Good
1,485 reviews
Check prices

Crew

8.4

Boarding

7.8

Comfort

7.6

Overall

7.7

Entertainment

7.1

Food

7.3

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?

    Air Canada, American Airlines, and Delta can get you from London Heathrow Airport to Saint Lucia in just under 29h 39m. Your travel time can differ by up to 26h 01m. 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, November is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £500). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £803). 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 Montego Bay flights
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London City to Bridgetown flights
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London City to Kingston flights
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Heathrow to St. George's flights
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London City to Punta Cana flights
Heathrow to St. John's flights
London City to Montego Bay flights
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Heathrow to Nassau flights
Heathrow to Santo Domingo flights
Gatwick to St. John's flights
Heathrow to Port of Spain flights
Heathrow to Willemstad flights
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Heathrow to Roseau flights
Heathrow to Oranjestad flights
Heathrow to Providenciales flights
Gatwick to St. George's flights
Gatwick to Luis Munoz Marin Intl flights
Gatwick to Port of Spain flights
Heathrow to Luis Munoz Marin Intl flights
Gatwick to Willemstad flights
Heathrow to Simpson Bay flights
London City to Santo Domingo flights
Gatwick to Havana flights
Heathrow to Kingstown flights
Stansted to Santo Domingo flights
Stansted to Luis Munoz Marin Intl flights
London City to Luis Munoz Marin Intl flights
Heathrow to Castries flights
Stansted to Port of Spain flights
Gatwick to Oranjestad flights
London City to Castries flights
Heathrow to George Town 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 3 April 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£511Average£864FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£541Average£750FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
JetBlueCheapest£542Average£855FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
FinnairCheapest£703Average£923FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£719Average£976FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£1,177Average£1,526FlexibilityNo 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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