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Cheap flights from London Heathrow Airport to Saint Lucia from £489

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
20 Jul — 27 Jul1
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 15 July 2025.

Round-trip from

£581

One-way from

£489

Popular in

December

Cheapest in

September

Average price

£550
Icelandair
  • Icelandair
  • 14/9-5/10
  • 2 total stops
  • 58h 40m total
  • London to Saint Lucia
Search Deals
Air Canada
  • Air Canada
  • 1/9
  • 1 total stop
  • 34h 45m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£51 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
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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 15 July 2025.

Sun 14/908:15LHR - UVF
1 stop34h 30mIcelandair
Sun 5/1015:35UVF - LHR
1 stop24h 10mIcelandair
Deal found 14/7£581
Sun 7/1213:25LHR - UVF
2 stops31h 00mAir Canada
Wed 17/1217:15UVF - LHR
1 stop33h 15mAir Canada
Deal found 13/7£624
Sun 7/908:15LHR - UVF
1 stop34h 30mJetBlue
Sun 14/915:05UVF - LHR
1 stop24h 40mJetBlue
Deal found 13/7£625
Fri 7/1114:20LHR - UVF
1 stop28h 50mMultiple Airlines
Mon 24/1118:40UVF - LHR
Nonstop10h 55mMultiple Airlines
Deal found 14/7£695
Wed 27/811:25LHR - SLU
1 stop12h 35mMultiple Airlines
Wed 3/912:35SLU - LHR
1 stop12h 45mMultiple Airlines
Deal found 13/7£697
Fri 29/809:40LHR - UVF
2 stops33h 35mDelta
Fri 5/915:35UVF - LHR
2 stops23h 25mDelta
Deal found 14/7£707
Mon 8/912:15LHR - UVF
1 stop31h 02mAmerican Airlines
Mon 22/915:17UVF - LHR
1 stop14h 18mAmerican Airlines
Deal found 14/7£711
Sun 7/919:05LHR - UVF
2 stops24h 12mRoyal Air Maroc
Sun 21/915:17UVF - LHR
2 stops34h 03mRoyal Air Maroc
Deal found 13/7£792
Sun 7/919:05LHR - UVF
2 stops24h 12mBritish Airways
Sun 21/915:17UVF - LHR
1 stop14h 18mBritish Airways
Deal found 13/7£795
Fri 24/1015:20LHR - UVF
1 stop27h 11mUnited Airlines
Sat 1/1116:17UVF - LHR
1 stop36h 08mUnited Airlines
Deal found 13/7£819

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 15 July 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 14/9

08:15-13:45

1 stop34h 30m

Castries Hewanorra

Sun 5/10

15:35-20:45

1 stop24h 10m

£581

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 7/12

13:25-16:25

2 stops31h 00m

Castries Hewanorra

Wed 17/12

17:15-06:30

1 stop33h 15m

£624

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 7/9

08:15-13:45

1 stop34h 30m

Castries Hewanorra

Sun 14/9

15:05-20:45

1 stop24h 40m

£625

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 7/11

14:20-15:10

1 stop28h 50m

Castries Hewanorra

Mon 24/11

18:40-09:35

Nonstop10h 55m

£695

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 27/8

11:25-19:00

1 stop12h 35m

Castries George F. L. Charle

Wed 3/9

12:35-06:20

1 stop12h 45m

£697

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 29/8

16:05-14:15

2 stops27h 10m

Castries Hewanorra

Fri 5/9

15:35-20:00

2 stops23h 25m

£707

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 8/9

12:15-14:17

1 stop31h 02m

Castries Hewanorra

Mon 22/9

15:17-10:35

1 stop14h 18m

£711

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 7/9

19:05-14:17

2 stops24h 12m

Castries Hewanorra

Sun 21/9

15:17-06:20

2 stops34h 03m

£792

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 7/9

19:05-14:17

2 stops24h 12m

Castries Hewanorra

Sun 21/9

15:17-10:35

1 stop14h 18m

£795

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 24/10

15:20-13:31

1 stop27h 11m

Castries Hewanorra

Sat 1/11

16:17-08:25

1 stop36h 08m

£819

Flights are sorted by cheapest return flights first.

Deals found on 13/7

Showing 1-10 of 18 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 15 July 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 15 July 2025.
Read reviews from past customers who have flown with Delta, KLM, andUnited Airlines 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.
Delta
8.0
Very Good
7,956 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

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
7,956 reviews
Delta
8.0
Very Good
7,956 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

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
1,372 reviews
Delta
8.0
Very Good
7,956 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

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
8,858 reviews
Delta
8.0
Very Good
7,956 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

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
JetBlue
7.3
Good
2,908 reviews
Delta
8.0
Very Good
7,956 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

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
7,956 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

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 £489. Users have also found prices from £598 and £705 on Icelandair and JetBlue, respectively.

  • 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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London City to Santo Domingo flights
Gatwick to Luis Munoz Marin Intl flights
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Luton to Punta Cana flights
London City to Oranjestad flights
Gatwick to Castries flights
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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 15 July 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£424Average£608FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£428Average£606FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air CanadaCheapest£513Average£619FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£641Average£822FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£680Average£1,311FlexibilityNo 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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