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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 24/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
12 Apr — 19 Apr1
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 13 March 2026.

Mon 6/411:55
LHR
-
UVF
1 stop34h 52m
JetBlue
Tue 21/415:57
UVF
-
LHR
1 stop23h 48m
JetBlue
Deal found 9/3£636
Wed 8/411:55
LHR
-
UVF
1 stop34h 52m
JetBlue
Wed 22/415:56
UVF
-
LHR
1 stop23h 49m
JetBlue
Deal found 8/3£637
Mon 11/508:15
LHR
-
UVF
1 stop35h 12m
JetBlue
Thu 21/513:50
UVF
-
LHR
1 stop25h 55m
JetBlue
Deal found 10/3£639
Wed 8/411:55
LHR
-
UVF
1 stop34h 52m
JetBlue
Wed 15/415:57
UVF
-
LHR
1 stop36h 33m
JetBlue
Deal found 9/3£666
Mon 13/411:55
LHR
-
UVF
1 stop31h 42m
JetBlue
Mon 20/415:57
UVF
-
LHR
1 stop23h 48m
JetBlue
Deal found 11/3£674
Tue 12/508:15
LHR
-
UVF
1 stop35h 12m
JetBlue
Thu 21/516:41
UVF
-
LHR
1 stop23h 04m
JetBlue
Deal found 10/3£679
Tue 12/508:15
LHR
-
UVF
1 stop35h 12m
JetBlue
Fri 22/513:50
UVF
-
LHR
1 stop25h 55m
JetBlue
Deal found 12/3£692
Thu 23/414:05
LHR
-
UVF
2 stops30h 15m
Air Canada
Thu 30/416:15
UVF
-
LHR
2 stops47h 45m
Air Canada
Deal found 9/3£714
Sun 15/306:30
LHR
-
SLU
3 stops37h 05m
Multiple Airlines
Sun 22/305:00
SLU
-
LHR
2 stops25h 45m
Multiple Airlines
Deal found 9/3£795
Mon 16/1110:35
LHR
-
SLU
1 stop12h 25m
Multiple Airlines
Sun 29/1115:45
SLU
-
LHR
1 stop12h 45m
Multiple Airlines
Deal found 12/3£800
Mon 22/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Wed 1/712:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 12/3£802
Mon 1/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Mon 8/612:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 9/3£818

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 13 March 2026.

Round-trip from

£636

One-way from

£406

Popular in

April

Cheapest in

November
JetBlue
  • JetBlue
  • 6/4-21/4
  • 2 total stops
  • 58h 40m total
  • London to Saint Lucia
Search Deals
24/4
  • 24/4
  • 3 total stops
  • 45h 50m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 45% potential increase in price (£531 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 15% potential price decrease (£89 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 13 March 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

Thu 9/4

11:45-13:58

2 stops31h 13m

Castries Hewanorra

Fri 24/4

15:22-13:15

1 stop16h 53m

£736

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 15/4

16:20-14:02

2 stops26h 42m

Castries Hewanorra

Tue 28/4

15:22-13:15

1 stop16h 53m

£739

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 31/3

09:55-13:58

2 stops57h 03m

Castries Hewanorra

Mon 6/4

15:18-06:45

2 stops34h 27m

£754

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 2/4

15:15-13:58

1 stop27h 43m

Castries Hewanorra

Tue 7/4

15:18-13:45

2 stops41h 27m

£786

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 11/5

20:05-14:05

2 stops23h 00m

Castries Hewanorra

Thu 21/5

15:25-20:10

2 stops23h 45m

£946

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 23/4

19:25-13:45

2 stops23h 20m

Castries Hewanorra

Sun 17/5

14:45-19:45

2 stops24h 00m

£962

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 5/9

09:35-19:00

1 stop14h 25m

Castries George F. L. Charle

Sun 6/9

12:35-09:20

1 stop15h 45m

£966

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 12/5

11:20-14:27

2 stops32h 07m

Castries Hewanorra

Fri 22/5

13:50-22:25

2 stops27h 35m

£1,012

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 1/4

08:40-13:58

2 stops34h 18m

Castries Hewanorra

Mon 6/4

15:18-06:45

2 stops34h 27m

£1,021

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 31/3

09:55-13:58

2 stops57h 03m

Castries Hewanorra

Wed 8/4

15:18-10:20

2 stops38h 02m

£1,036

Flights are sorted by cheapest return flights first.

Deals found on 10/3

Showing 1-10 of 38 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, November is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £494). Flying from London Heathrow Airport to Saint Lucia in December 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.

How often are flights from London to Saint Lucia delayed?

About 10% of weekly flights between London and Saint Lucia have experienced delays in the past year, with the average delay time being 119 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 10% 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 13 March 2026.
Read reviews from past customers who have flown with KLM,Finnair, 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
1,470 reviews
Check prices

Entertainment

7.1

Comfort

7.6

Food

7.3

Boarding

7.8

Overall

7.8

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
1,470 reviews
KLM
7.8
Good
1,470 reviews
Check prices

Entertainment

7.1

Comfort

7.6

Food

7.3

Boarding

7.8

Overall

7.8

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
7.6
Good
1,371 reviews
KLM
7.8
Good
1,470 reviews
Check prices

Entertainment

7.1

Comfort

7.6

Food

7.3

Boarding

7.8

Overall

7.8

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
10,800 reviews
KLM
7.8
Good
1,470 reviews
Check prices

Entertainment

7.1

Comfort

7.6

Food

7.3

Boarding

7.8

Overall

7.8

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
7,784 reviews
KLM
7.8
Good
1,470 reviews
Check prices

Entertainment

7.1

Comfort

7.6

Food

7.3

Boarding

7.8

Overall

7.8

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 can get you from London Heathrow Airport to Saint Lucia in just under 31h 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, November is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £494). Flying from London Heathrow Airport to Saint Lucia in December 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.
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Gatwick to Havana flights
London City to Luis Munoz Marin Intl flights
Heathrow to Santiago de los Caballeros flights
Gatwick to Scarborough flights
Heathrow to Oranjestad flights
Heathrow to Basseterre flights

Top 4 airlines flying from Heathrow to Saint Lucia

Discover the top 4 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 13 March 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£490Average£789FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£535Average£720FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£705Average£905FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£1,077Average£1,491FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

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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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