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Cheap flights from London Heathrow Airport to Saint Lucia from £363

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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
27 Dec — 3 Jan1
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 27 November 2025.

Round-trip from

£674

One-way from

£363

Popular in

April

Cheapest in

November

Average price

£503
Air Canada
  • Air Canada
  • 12/5-22/5
  • 2 total stops
  • 60h 00m total
  • London to Saint Lucia
Search Deals
JetBlue
  • JetBlue
  • 9/3
  • 1 total stop
  • 30h 37m 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 (£53 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 27 November 2025.

Fri 26/1215:50LHR - UVF
1 stop25h 46mDelta
Sun 18/116:25UVF - LHR
1 stop36h 35mDelta
Deal found 24/11£706
Wed 31/1214:40LHR - UVF
2 stops28h 50mDelta
Tue 20/116:25UVF - LHR
2 stops35h 40mDelta
Deal found 24/11£723
Thu 27/1113:20LHR - SLU
1 stop27h 50mMultiple Airlines
Sun 30/1112:10SLU - LHR
1 stop13h 15mMultiple Airlines
Deal found 26/11£726
Fri 5/1209:00LHR - UVF
2 stops59h 25mAir Canada
Mon 22/1217:15UVF - LHR
2 stops47h 20mAir Canada
Deal found 24/11£781
Wed 31/1210:15LHR - UVF
2 stops30h 49mAmerican Airlines
Sat 17/117:02UVF - LHR
2 stops36h 33mAmerican Airlines
Deal found 24/11£805
Wed 26/1116:35LHR - UVF
2 stops27h 04mDelta
Wed 3/1216:56UVF - LHR
1 stop14h 44mDelta
Deal found 23/11£829
Tue 30/1211:15LHR - UVF
1 stop29h 49mAmerican Airlines
Fri 16/114:46UVF - LHR
1 stop17h 34mAmerican Airlines
Deal found 24/11£836
Sat 27/1209:55LHR - UVF
2 stops31h 09mAmerican Airlines
Fri 16/117:02UVF - LHR
2 stops21h 58mAmerican Airlines
Deal found 24/11£848
Tue 9/1216:10LHR - UVF
2 stops27h 26mDelta
Thu 21/515:25UVF - LHR
1 stop17h 05mDelta
Deal found 25/11£866
Fri 26/1209:40LHR - UVF
2 stops31h 56mDelta
Thu 15/116:25UVF - LHR
2 stops23h 45mDelta
Deal found 24/11£867
Thu 4/1213:20LHR - SLU
1 stop29h 55mMultiple Airlines
Mon 8/1215:45SLU - LHR
1 stop14h 55mMultiple Airlines
Deal found 26/11£870
Wed 3/1213:25LHR - SLU
3 stops33h 35mMultiple Airlines
Wed 10/1210:15SLU - LHR
3 stops21h 05mMultiple Airlines
Deal found 26/11£892

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 27 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

Wed 25/2

08:00-19:00

1 stop15h 00m

Castries George F. L. Charle

Wed 11/3

15:45-09:55

1 stop14h 10m

£705

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 26/12

15:50-13:36

1 stop25h 46m

Castries Hewanorra

Sun 18/1

16:25-09:00

1 stop36h 35m

£706

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 26/12

15:50-13:36

1 stop25h 46m

Castries Hewanorra

Fri 16/1

16:25-09:00

1 stop36h 35m

£706

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 26/12

15:50-13:36

1 stop25h 46m

Castries Hewanorra

Tue 20/1

16:25-09:00

1 stop36h 35m

£706

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 26/12

15:50-13:36

1 stop25h 46m

Castries Hewanorra

Thu 15/1

16:25-06:25

1 stop34h 00m

£706

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 26/12

15:50-13:36

1 stop25h 46m

Castries Hewanorra

Wed 21/1

16:25-11:40

1 stop15h 15m

£706

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 23/2

09:40-17:30

1 stop11h 50m

Castries George F. L. Charle

Mon 9/3

15:45-09:55

1 stop14h 10m

£707

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sat 14/3

19:10-14:58

2 stops47h 48m

Castries Hewanorra

Sat 21/3

13:07-11:15

1 stop18h 08m

£711

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 21/1

16:10-15:05

2 stops26h 55m

Castries Hewanorra

Wed 28/1

16:25-20:10

2 stops23h 45m

£711

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 29/1

09:40-15:05

2 stops33h 25m

Castries Hewanorra

Thu 5/2

16:25-20:10

2 stops23h 45m

£711

Flights are sorted by cheapest return flights first.

Deals found on 24/11

Showing 1-10 of 42 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 £386). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £676). 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 27 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.

How often are flights from London to Saint Lucia delayed?

About 18% of weekly flights between London and Saint Lucia have experienced delays in the past year, with the average delay time being 150 minutes.

What is the most punctual flight time for London to Saint Lucia flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Wednesday tends to have the lowest number of delays on this route, whereas Monday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Saint Lucia flights?

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 16% of flights being delayed.

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 27 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
1,423 reviews
Check prices

Comfort

7.6

Food

7.2

Overall

7.7

Boarding

7.8

Crew

8.4

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
1,423 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Comfort

7.6

Food

7.2

Overall

7.7

Boarding

7.8

Crew

8.4

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
1,334 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Comfort

7.6

Food

7.2

Overall

7.7

Boarding

7.8

Crew

8.4

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
675 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Comfort

7.6

Food

7.2

Overall

7.7

Boarding

7.8

Crew

8.4

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
10,481 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Comfort

7.6

Food

7.2

Overall

7.7

Boarding

7.8

Crew

8.4

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
7,539 reviews
KLM
7.7
Good
1,423 reviews
Check prices

Comfort

7.6

Food

7.2

Overall

7.7

Boarding

7.8

Crew

8.4

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?

    Delta can get you from London Heathrow Airport to Saint Lucia in just under 25h 46m. 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 £386). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £676). 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.
Heathrow to Bridgetown flights
Heathrow to Montego Bay flights
Heathrow to Kingston flights
London City to Bridgetown flights
Heathrow to Punta Cana flights
Gatwick to Punta Cana flights
Heathrow to Nassau flights
Gatwick to Bridgetown flights
Heathrow to St. George's flights
Gatwick to Kingston flights
Heathrow to Port of Spain flights
Heathrow to Castries flights
London City to Kingston flights
Gatwick to St. John's flights
Stansted to Punta Cana flights
London City to Montego Bay flights
London City to Punta Cana flights
Heathrow to Luis Munoz Marin Intl flights
Stansted to Bridgetown flights
Gatwick to Castries flights
Gatwick to Nassau flights
Luton to Punta Cana flights
Heathrow to Kingstown flights
Gatwick to Luis Munoz Marin Intl flights
Heathrow to St. John's flights
Heathrow to Simpson Bay flights
Gatwick to St. George's flights
Heathrow to Castries flights
Gatwick to Montego Bay flights
Heathrow to Road Town flights
Heathrow to Roseau flights
London City to Castries flights
Gatwick to Port of Spain flights
Stansted to Montego Bay flights
London City to Nassau flights
Gatwick to Santo Domingo flights
Gatwick to Simpson Bay flights
Heathrow to George Town flights
Heathrow to Santo Domingo flights
London City to Luis Munoz Marin Intl flights
Gatwick to Road Town flights
Gatwick to Havana flights
Luton to Montego Bay flights
Stansted to Kingston flights
London City to St. John's flights
Heathrow to Basseterre flights
Stansted to Port of Spain flights
London City to Santo Domingo flights
Gatwick to Castries flights
Stansted to Luis Munoz Marin Intl 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 27 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£390Average£534FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£433Average£609FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£527Average£677FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£653Average£837FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£694Average£1,449FlexibilityNo 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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