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Cheap flights from London Heathrow Airport to Saint Lucia from £368

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
14 Dec — 21 Dec1
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 14 November 2025.

Round-trip from

£611

One-way from

£368

Popular in

April

Cheapest in

November

Average price

£505
Air Canada
  • Air Canada
  • 4/12-10/12
  • 2 total stops
  • 47h 20m total
  • London to Saint Lucia
Search Deals
JetBlue
  • JetBlue
  • 25/1
  • 1 total stop
  • 30h 55m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£84 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease (£54 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 14 November 2025.

Thu 4/1211:10LHR - UVF
1 stop33h 15mAir Canada
Wed 10/1217:15UVF - LHR
1 stop14h 05mAir Canada
Deal found 13/11£611
Wed 3/1213:45LHR - UVF
2 stops54h 40mAir Canada
Wed 10/1217:15UVF - LHR
1 stop33h 15mAir Canada
Deal found 13/11£644
Thu 4/1206:30LHR - UVF
2 stops37h 55mMultiple Airlines
Wed 10/1217:15UVF - LHR
1 stop33h 15mMultiple Airlines
Deal found 13/11£648
Wed 3/1213:45LHR - UVF
2 stops54h 40mAir Canada
Mon 8/1217:15UVF - LHR
1 stop33h 15mAir Canada
Deal found 13/11£669
Tue 2/1218:00LHR - UVF
1 stop26h 20mAir Canada
Wed 10/1217:15UVF - LHR
1 stop14h 05mAir Canada
Deal found 13/11£673
Tue 2/1209:40LHR - SLU
1 stop13h 20mMultiple Airlines
Tue 16/1207:30SLU - LHR
1 stop22h 25mMultiple Airlines
Deal found 13/11£843
Thu 11/1213:20LHR - SLU
1 stop27h 50mMultiple Airlines
Thu 18/1215:20SLU - LHR
1 stop14h 15mMultiple Airlines
Deal found 11/11£845
Sun 16/1118:00LHR - SLU
2 stops27h 30mMultiple Airlines
Sun 23/1112:10SLU - LHR
2 stops19h 10mMultiple Airlines
Deal found 13/11£878
Wed 26/1118:00LHR - SLU
2 stops29h 00mMultiple Airlines
Wed 3/1210:15SLU - LHR
3 stops21h 05mMultiple Airlines
Deal found 13/11£910
Fri 28/1118:00LHR - SLU
3 stops32h 10mMultiple Airlines
Sat 6/1212:35SLU - LHR
2 stops18h 45mMultiple Airlines
Deal found 11/11£929
Wed 26/1112:15LHR - SLU
3 stops28h 55mMultiple Airlines
Sun 30/1119:10SLU - LHR
3 stops35h 40mMultiple Airlines
Deal found 11/11£956
Wed 26/1113:25LHR - SLU
1 stop26h 40mMultiple Airlines
Tue 2/1212:35SLU - LHR
1 stop13h 15mMultiple Airlines
Deal found 13/11£961

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 14 November 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 11/5

12:05-12:05

1 stop29h 00m

Castries George F. L. Charle

Mon 25/5

15:45-12:00

1 stop15h 15m

£678

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sat 31/1

13:25-16:25

2 stops55h 00m

Castries Hewanorra

Sun 8/2

17:15-06:30

1 stop33h 15m

£708

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 3/12

20:00-15:36

2 stops47h 36m

Castries Hewanorra

Sun 7/12

16:56-09:00

1 stop36h 04m

£709

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sat 24/1

19:05-15:03

2 stops23h 58m

Castries Hewanorra

Fri 30/1

17:02-12:20

1 stop15h 18m

£714

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 28/1

10:10-15:05

2 stops32h 55m

Castries Hewanorra

Mon 2/2

16:25-11:40

1 stop15h 15m

£714

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 23/1

18:00-13:46

1 stop23h 46m

Castries Hewanorra

Sun 1/2

16:06-12:00

1 stop15h 54m

£714

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 5/2

16:10-15:05

2 stops26h 55m

Castries Hewanorra

Wed 4/3

16:24-06:55

2 stops34h 31m

£714

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sat 24/1

11:45-15:03

1 stop31h 18m

Castries Hewanorra

Sat 31/1

15:10-11:15

1 stop16h 05m

£714

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 1/2

16:50-15:05

2 stops26h 15m

Castries Hewanorra

Wed 4/3

16:24-06:20

2 stops33h 56m

£714

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sat 24/1

14:30-13:46

1 stop27h 16m

Castries Hewanorra

Sun 1/2

16:06-12:00

1 stop15h 54m

£714

Flights are sorted by cheapest return flights first.

Deals found on 12/11

Showing 1-10 of 41 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 £387). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £673). 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 14 November 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 14 November 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
1,411 reviews
Check prices

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Overall

7.7

Food

7.3

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
1,411 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Overall

7.7

Food

7.3

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
1,334 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Overall

7.7

Food

7.3

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
673 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Overall

7.7

Food

7.3

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
10,450 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Overall

7.7

Food

7.3

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
7,521 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Overall

7.7

Food

7.3

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?

    Air Canada, Delta, and American Airlines can get you from London Heathrow Airport to Saint Lucia in just under 23h 58m. Your travel time can differ by up to 31h 02m. 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 £387). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £673). 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 Montego Bay flights
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Heathrow to Basseterre flights
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Heathrow to Road Town flights
Heathrow to George Town flights
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Gatwick to Nassau flights
Gatwick to Havana flights
Stansted to Kingston flights
Stansted to Bridgetown flights
Stansted to Montego Bay flights
Gatwick to Santo Domingo flights
Gatwick to Simpson Bay flights
London City to St. John's flights
Gatwick to Road Town flights
Gatwick to Castries flights
Heathrow to Oranjestad flights
Luton to Montego Bay flights
London City to Oranjestad 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 14 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£391Average£536FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£434Average£611FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£529Average£679FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£655Average£840FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£696Average£1,453FlexibilityNo 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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