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Cheap flights from London Heathrow Airport to Saint Lucia from £387

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 28/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
30 Mar — 6 Apr1
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 25 March 2025.

Round-trip from

£538

One-way from

£387

Popular in

December

Cheapest in

September

Average price

£526

Good round-trip deal

£487 or less
Air Canada
  • Air Canada
  • 8/6-17/6
  • 3 total stops
  • 75h 10m total
  • London to Saint Lucia
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28/4
  • 28/4
  • 3 total stops
  • 45h 30m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£69 potential increase over avg. return price).
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Cheapest flight prices on average. 6% potential price decrease (£31 potential savings vs. average return price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from London Heathrow to Saint Lucia.
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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 25 March 2025.

Sun 8/607:45LHR - UVF
2 stops59h 30mAir Canada
Tue 17/615:10UVF - LHR
1 stop15h 40mAir Canada
Deal found 24/3£538
Thu 24/408:15LHR - UVF
1 stop36h 30mIcelandair
Thu 1/515:10UVF - LHR
2 stops34h 20mIcelandair
Deal found 25/3£659
Thu 19/608:05LHR - SLU
1 stop11h 30mMultiple Airlines
Thu 3/715:20SLU - LHR
1 stop11h 30mMultiple Airlines
Deal found 25/3£688
Thu 3/417:50LHR - UVF
2 stops25h 14mDelta
Sat 12/415:25UVF - LHR
1 stop34h 20mDelta
Deal found 24/3£710
Wed 7/509:15LHR - UVF
1 stop33h 56mBritish Airways
Wed 14/514:34UVF - LHR
2 stops34h 46mBritish Airways
Deal found 24/3£713
Fri 10/1009:55LHR - UVF
1 stop31h 15mAmerican Airlines
Fri 17/1016:10UVF - LHR
1 stop15h 35mAmerican Airlines
Deal found 24/3£714
Wed 9/420:10LHR - UVF
2 stops22h 35mFinnair
Thu 17/415:28UVF - LHR
2 stops34h 02mFinnair
Deal found 24/3£758
Sun 7/1212:40LHR - UVF
Nonstop9h 00mVirgin Atlantic
Sun 21/1219:35UVF - LHR
Nonstop8h 15mVirgin Atlantic
Deal found 25/3£838
Thu 19/617:40LHR - UVF
1 stop25h 35mMultiple Airlines
Thu 3/714:35UVF - LHR
1 stop35h 00mMultiple Airlines
Deal found 25/3£840

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 25 March 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

Sun 8/6

07:45-14:15

2 stops59h 30m

Castries Hewanorra

Tue 17/6

15:10-11:50

1 stop15h 40m

£538

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 24/4

08:15-15:45

1 stop36h 30m

Castries Hewanorra

Thu 1/5

15:10-06:30

2 stops34h 20m

£659

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 19/6

08:05-14:35

1 stop11h 30m

Castries George F. L. Charle

Thu 3/7

15:20-07:50

1 stop11h 30m

£688

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 8/9

18:15-14:23

2 stops25h 08m

Castries Hewanorra

Thu 11/9

15:38-20:00

2 stops23h 22m

£710

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 7/5

09:15-14:11

1 stop33h 56m

Castries Hewanorra

Wed 14/5

14:34-06:20

2 stops34h 46m

£713

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 24/4

12:15-13:45

1 stop30h 30m

Castries Hewanorra

Thu 1/5

15:28-12:30

1 stop16h 02m

£715

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 9/4

20:10-13:45

2 stops22h 35m

Castries Hewanorra

Thu 17/4

15:28-06:30

2 stops34h 02m

£758

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 19/6

08:30-14:15

1 stop34h 45m

Castries Hewanorra

Thu 3/7

14:35-21:00

2 stops25h 25m

£840

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 5/9

16:40-13:31

2 stops25h 51m

Castries Hewanorra

Sat 13/9

14:35-10:10

1 stop14h 35m

£907

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 28/4

22:15-14:45

3 stops45h 30m

£387

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 17 results
1
2

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 25 March 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.

What is the cheapest day to fly from London Heathrow Airport to Saint Lucia?

Use this chart to determine the cheapest time to fly return from Heathrow to Saint Lucia. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London Heathrow Airport to Saint Lucia flight should consider departing on Monday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 25 March 2025.
To help decide which airline to fly from London to Saint Lucia, see what other customers have to say about Delta, KLM and Finnair. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,891 reviews
Check prices

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Delta
8.0
Very Good
7,891 reviews
Delta
8.0
Very Good
7,891 reviews
Check prices

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
KLM
7.8
Good
1,318 reviews
Delta
8.0
Very Good
7,891 reviews
Check prices

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Finnair
7.6
Good
1,266 reviews
Delta
8.0
Very Good
7,891 reviews
Check prices

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
United Airlines
7.4
Good
8,608 reviews
Delta
8.0
Very Good
7,891 reviews
Check prices

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
7,891 reviews
Check prices

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

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.

  • What are the cheapest airlines to fly from London Heathrow Airport to Saint Lucia one-way?

    For one-way options, check prices for Air Canada. According to our data, you can fly for as low as £503. Users have also found prices from £555 and £573 on United Airlines and WestJet, respectively.

  • What are the cheapest flights from London Heathrow Airport to Saint Lucia?

    While on average a flight from London Heathrow Airport to Saint Lucia is generally £535, our data shows the cheapest flight currently is £386. When looking at the most popular route, (London Heathrow - Castries Hewanorra), you can expect to pay £571 for that flight.

  • 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

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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 Bridgetown flights
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Heathrow to Luis Munoz Marin Intl flights
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Heathrow to Castries flights
Luton to Montego Bay flights
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London City to Luis Munoz Marin Intl flights
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Gatwick to Castries flights
Heathrow to Port of Spain flights
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Gatwick to St. George's flights
Heathrow to St. George's flights
London City to Castries flights
Heathrow to Providenciales flights
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Stansted to Bridgetown flights
Gatwick to Havana flights
Heathrow to Kingstown flights
Heathrow to Roseau flights
Stansted to Santo Domingo flights
Gatwick to Basseterre flights
Stansted to Kingston flights
London City to Santo Domingo flights
Heathrow to Castries flights
Heathrow to Basseterre flights
Gatwick to Port of Spain flights
Gatwick to Castries flights
Gatwick to Simpson Bay flights
Heathrow to Havana 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 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£441Average£654FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£449Average£647FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£531Average£1,229FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air CanadaCheapest£533Average£644FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£667Average£854FlexibilityNo cancel feeOn-time76%
Search Finnair 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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