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Cheap flights from London Heathrow Airport to Saint Lucia from £358

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 25/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
7 12月 — 14 12月1
1 adult
1 adult, Economy, 0 bags

Cheap 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 7 11月 2025.

Round-trip from

£599

One-way from

£358

Popular in

April

Cheapest in

November

Average price

£507
JetBlue
  • JetBlue
  • 29/1-8/2
  • 2 total stops
  • 55h 00m total
  • London to Saint Lucia
Search Deals
JetBlue
  • JetBlue
  • 25/1
  • 1 total stop
  • 35h 30m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£108 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease (£57 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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Find 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 7 11月 2025.

週三 3/1213:45LHR - UVF
2 stops54h 40mAir Canada
週三 10/1217:15UVF - LHR
1 stop14h 05mAir Canada
Deal found 5/11£624
週二 2/1207:25LHR - UVF
1 stop35h 32mJetBlue
週四 11/1216:57UVF - LHR
1 stop23h 48mJetBlue
Deal found 5/11£628
週六 22/1113:45LHR - UVF
2 stops54h 40mAir Canada
週一 8/1217:15UVF - LHR
1 stop35h 15mAir Canada
Deal found 6/11£645
週三 3/1220:15LHR - UVF
2 stops48h 10mMultiple Airlines
週三 10/1217:15UVF - LHR
1 stop33h 15mMultiple Airlines
Deal found 5/11£658
週二 9/1207:25LHR - UVF
1 stop35h 32mJetBlue
週六 13/1216:10UVF - LHR
1 stop34h 45mJetBlue
Deal found 4/11£662
週一 1/1213:45LHR - UVF
2 stops54h 35mAir Canada
週三 10/1217:15UVF - LHR
1 stop33h 15mAir Canada
Deal found 5/11£675
週二 2/1212:20LHR - UVF
1 stop30h 37mIcelandair
週四 11/1216:57UVF - LHR
2 stops57h 58mIcelandair
Deal found 5/11£690
週二 9/1212:20LHR - UVF
1 stop30h 37mIcelandair
週四 21/514:24UVF - LHR
1 stop25h 21mIcelandair
Deal found 5/11£707
週三 31/1215:50LHR - UVF
1 stop27h 40mDelta
週四 15/116:25UVF - LHR
2 stops23h 45mDelta
Deal found 6/11£708
週三 19/1118:00LHR - SLU
2 stops29h 00mMultiple Airlines
週三 26/1110:15SLU - LHR
3 stops21h 05mMultiple Airlines
Deal found 7/11£901
週三 12/1113:00LHR - SLU
2 stops34h 00mMultiple Airlines
週三 26/1109:10SLU - LHR
2 stops22h 10mMultiple Airlines
Deal found 6/11£923
週五 21/1118:00LHR - SLU
3 stops32h 10mMultiple Airlines
週六 6/1212:35SLU - LHR
2 stops18h 45mMultiple Airlines
Deal found 4/11£926

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 7 11月 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Saint Lucia that are best for you.

Fly from

Heathrow

Fly to

Saint Lucia

Route

Depart

Return

Price

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

週四 29/1

09:20-15:15

2 stops33h 55m

Castries Hewanorra

週日 8/2

16:40-20:45

1 stop24h 05m

£626

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

週二 13/1

06:00-16:20

2 stops38h 20m

Castries Hewanorra

週三 28/1

17:15-06:30

1 stop33h 15m

£644

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

週四 8/1

09:20-15:43

2 stops34h 23m

Castries Hewanorra

週四 22/1

16:40-20:45

1 stop24h 05m

£645

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

週三 3/12

20:15-16:25

2 stops48h 10m

Castries Hewanorra

週三 10/12

17:15-06:30

1 stop33h 15m

£658

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

週三 31/12

10:45-15:30

1 stop32h 45m

Castries Hewanorra

週四 15/1

16:25-09:00

1 stop36h 35m

£708

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

週二 24/3

16:10-14:04

2 stops25h 54m

Castries Hewanorra

週三 1/4

15:24-20:00

2 stops23h 36m

£714

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

週日 22/3

15:50-14:04

1 stop26h 14m

Castries Hewanorra

週三 1/4

15:24-13:30

1 stop17h 06m

£714

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

週三 25/3

15:50-14:04

1 stop26h 14m

Castries Hewanorra

週三 1/4

15:24-20:00

2 stops23h 36m

£714

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

週一 23/3

15:50-14:04

1 stop26h 14m

Castries Hewanorra

週日 5/4

15:24-13:30

1 stop17h 06m

£714

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

週三 21/1

13:25-19:00

1 stop33h 35m

Castries George F. L. Charle

週三 28/1

12:35-05:50

1 stop13h 15m

£739

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 34 results
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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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £389). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £677). 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.

What is the cheapest time of day to fly from LHR to LC?

Find hourly flight availability from Heathrow to Saint Lucia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7 11月 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Saint Lucia in the morning. If you’re flexible enough to do this you can expect to save up to 51% on your trip compared to booking a flight in the afternoon.

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 7 11月 2025.
Read reviews from past customers who have flown with KLM, Finnair, andVirgin Atlantic 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
1,408 reviews
Check prices

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,408 reviews
KLM
7.7
Good
1,408 reviews
Check prices

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Finnair
7.6
Good
1,335 reviews
KLM
7.7
Good
1,408 reviews
Check prices

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Virgin Atlantic
7.5
Good
672 reviews
KLM
7.7
Good
1,408 reviews
Check prices

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Air Canada
7.1
Good
10,416 reviews
KLM
7.7
Good
1,408 reviews
Check prices

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
British Airways
6.7
Okay
7,500 reviews
KLM
7.7
Good
1,408 reviews
Check prices

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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?

    Icelandair can get you from London Heathrow Airport to Saint Lucia in just under 33h 55m. 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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £389). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £677). 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 Pointe-à-Pitre flights
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London City to Santo Domingo flights
Stansted to Montego Bay flights
London City to Luis Munoz Marin Intl flights
Heathrow to Providenciales flights
Gatwick to Road Town flights
London City to Pointe-à-Pitre flights
Gatwick to Simpson Bay flights
Stansted to Kingston 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 7 11月 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£393Average£538FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£436Average£614FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£531Average£683FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£659Average£844FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£699Average£1,461FlexibilityNo 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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