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Cheap flights from London Heathrow Airport to Saint Lucia from £396

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 3/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
2 Sep — 9 Sep1
1 adult

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 28 August 2025.

Round-trip from

£610

One-way from

£396

Popular in

December

Cheapest in

September

Average price

£694
13/10-19/10
  • 13/10-19/10
  • 2 total stops
  • 29h 05m total
  • London to Saint Lucia
Search Deals
3/12
  • 3/12
  • 2 total stops
  • 34h 35m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£59 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£26 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from Heathrow to Saint Lucia

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 28 August 2025.

Mon 13/1008:05LHR - SLU
1 stop14h 25mMultiple Airlines
Sun 19/1012:10SLU - LHR
1 stop14h 40mMultiple Airlines
Deal found 25/8£610
Sun 12/1008:15LHR - UVF
1 stop35h 05mJetBlue
Sun 19/1015:34UVF - LHR
1 stop24h 11mJetBlue
Deal found 28/8£624
Mon 3/1108:05LHR - UVF
1 stop34h 52mJetBlue
Mon 17/1116:57UVF - LHR
1 stop23h 48mJetBlue
Deal found 26/8£643
Mon 13/1008:15LHR - UVF
1 stop34h 59mJetBlue
Sun 19/1015:34UVF - LHR
1 stop24h 11mJetBlue
Deal found 25/8£652
Wed 24/908:15LHR - UVF
1 stop35h 00mJetBlue
Wed 8/1015:19UVF - LHR
1 stop24h 26mJetBlue
Deal found 26/8£653
Sat 11/1008:15LHR - UVF
1 stop34h 59mJetBlue
Sat 18/1014:06UVF - LHR
1 stop25h 39mJetBlue
Deal found 27/8£655
Thu 16/1008:40LHR - UVF
2 stops34h 35mAir Canada
Tue 21/1015:10UVF - LHR
1 stop15h 40mAir Canada
Deal found 26/8£656
Wed 24/908:15LHR - UVF
1 stop35h 00mJetBlue
Wed 1/1015:20UVF - LHR
1 stop24h 25mJetBlue
Deal found 27/8£659
Mon 22/908:05LHR - SLU
1 stop14h 25mMultiple Airlines
Fri 26/913:55SLU - LHR
1 stop12h 55mMultiple Airlines
Deal found 26/8£664
Sat 8/1108:00LHR - SLU
1 stop31h 25mMultiple Airlines
Sun 16/1112:10SLU - LHR
1 stop17h 45mMultiple Airlines
Deal found 26/8£668
Wed 15/1017:10LHR - UVF
2 stops50h 05mAir Canada
Tue 21/1015:10UVF - LHR
1 stop34h 25mAir Canada
Deal found 26/8£672
Wed 1/1008:15LHR - UVF
1 stop35h 00mIcelandair
Wed 8/1015:19UVF - LHR
1 stop24h 26mIcelandair
Deal found 28/8£685

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 28 August 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 - SLU

LHRSLU

London Heathrow

Mon 13/10

08:05-17:30

1 stop14h 25m

Castries George F. L. Charle

Sun 19/10

12:10-07:50

1 stop14h 40m

£610

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 3/11

08:05-14:57

1 stop34h 52m

Castries Hewanorra

Mon 17/11

16:57-20:45

1 stop23h 48m

£643

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 13/10

08:15-14:14

1 stop34h 59m

Castries Hewanorra

Sun 19/10

15:34-20:45

1 stop24h 11m

£652

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 24/9

08:15-14:15

1 stop35h 00m

Castries Hewanorra

Wed 8/10

15:19-20:45

1 stop24h 26m

£653

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sat 11/10

08:15-14:14

1 stop34h 59m

Castries Hewanorra

Sat 18/10

14:06-20:45

1 stop25h 39m

£655

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 16/10

08:40-14:15

2 stops34h 35m

Castries Hewanorra

Tue 21/10

15:10-11:50

1 stop15h 40m

£656

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 9/2

12:20-15:34

1 stop31h 14m

Castries Hewanorra

Sun 15/2

16:54-09:30

1 stop36h 36m

£658

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 24/9

08:15-14:15

1 stop35h 00m

Castries Hewanorra

Wed 1/10

15:20-20:45

1 stop24h 25m

£659

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 2/2

12:20-15:34

1 stop31h 14m

Castries Hewanorra

Mon 9/2

16:54-20:45

1 stop23h 51m

£661

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 21/1

19:25-16:25

2 stops49h 00m

Castries Hewanorra

Wed 28/1

17:15-11:20

1 stop14h 05m

£662

Flights are sorted by cheapest return flights first.

Deals found on 27/8

Showing 1-10 of 39 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 £328). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,100). 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 28 August 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Saint Lucia at midday. If you’re flexible enough to do this you can expect to save up to 2% on your trip compared to booking a flight in the morning.

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 28 August 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
7.8
Good
1,382 reviews
Check prices

Boarding

7.8

Comfort

7.7

Food

7.3

Entertainment

7.1

Overall

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,382 reviews
KLM
7.8
Good
1,382 reviews
Check prices

Boarding

7.8

Comfort

7.7

Food

7.3

Entertainment

7.1

Overall

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Finnair
7.6
Good
1,321 reviews
KLM
7.8
Good
1,382 reviews
Check prices

Boarding

7.8

Comfort

7.7

Food

7.3

Entertainment

7.1

Overall

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Virgin Atlantic
7.4
Good
661 reviews
KLM
7.8
Good
1,382 reviews
Check prices

Boarding

7.8

Comfort

7.7

Food

7.3

Entertainment

7.1

Overall

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Air Canada
7.1
Good
10,000 reviews
KLM
7.8
Good
1,382 reviews
Check prices

Boarding

7.8

Comfort

7.7

Food

7.3

Entertainment

7.1

Overall

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
British Airways
6.7
Okay
7,316 reviews
KLM
7.8
Good
1,382 reviews
Check prices

Boarding

7.8

Comfort

7.7

Food

7.3

Entertainment

7.1

Overall

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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?

    JetBlue and Air Canada can get you from London Heathrow Airport to Saint Lucia in just under 34h 35m. Your travel time can differ by up to 17m. 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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £328). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,100). 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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Stansted to Montego Bay flights
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Heathrow to Santiago de los Caballeros flights
Stansted to Luis Munoz Marin Intl flights
Gatwick to Road Town flights
Heathrow to Pointe-à-Pitre 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 28 August 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£416Average£601FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£424Average£586FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£517Average£642FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£641Average£821FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£680Average£1,311FlexibilityNo 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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