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Cheap flights from London Heathrow Airport to Saint Lucia from £382

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 20/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
21 Feb — 28 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap 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 22 January 2026.

Wed 25/209:00
LHR
-
UVF
2 stops35h 25m
Air Canada
Thu 5/317:15
UVF
-
LHR
2 stops33h 55m
Air Canada
Deal found 20/1£623
Thu 22/113:20
LHR
-
SLU
1 stop27h 50m
Multiple Airlines
Mon 2/216:20
SLU
-
LHR
1 stop13h 35m
Multiple Airlines
Deal found 21/1£639
Thu 19/1109:00
LHR
-
UVF
2 stops35h 25m
Air Canada
Sun 29/1117:25
UVF
-
LHR
2 stops23h 10m
Air Canada
Deal found 21/1£641
Sun 25/112:00
LHR
-
UVF
2 stops32h 25m
Air Canada
Sun 8/217:15
UVF
-
LHR
1 stop33h 15m
Air Canada
Deal found 20/1£643
Wed 6/517:50
LHR
-
UVF
2 stops49h 15m
Air Canada
Tue 19/515:15
UVF
-
LHR
1 stop15h 35m
Air Canada
Deal found 21/1£652
Sun 26/406:00
LHR
-
UVF
2 stops38h 20m
Air Canada
Fri 5/615:05
UVF
-
LHR
1 stop15h 45m
Air Canada
Deal found 21/1£659
Fri 23/118:30
LHR
-
UVF
2 stops49h 55m
Multiple Airlines
Sun 8/217:15
UVF
-
LHR
2 stops47h 20m
Multiple Airlines
Deal found 20/1£660
Wed 6/509:20
LHR
-
SLU
1 stop14h 40m
Multiple Airlines
Tue 19/516:20
SLU
-
LHR
1 stop12h 00m
Multiple Airlines
Deal found 21/1£701
Tue 27/113:20
LHR
-
SLU
1 stop26h 45m
Multiple Airlines
Tue 3/216:20
SLU
-
LHR
1 stop13h 15m
Multiple Airlines
Deal found 20/1£702
Wed 25/209:40
LHR
-
SLU
1 stop13h 20m
Multiple Airlines
Wed 11/312:35
SLU
-
LHR
1 stop12h 50m
Multiple Airlines
Deal found 19/1£704
Wed 21/109:40
LHR
-
SLU
1 stop32h 55m
Multiple Airlines
Wed 4/209:10
SLU
-
LHR
1 stop16h 15m
Multiple Airlines
Deal found 20/1£707
Thu 22/113:20
LHR
-
SLU
1 stop27h 50m
Multiple Airlines
Fri 6/209:10
SLU
-
LHR
1 stop16h 15m
Multiple Airlines
Deal found 20/1£713

Find 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 22 January 2026.

Round-trip from

£623

One-way from

£382

Popular in

April

Cheapest in

November

Average price

£645
Air Canada
  • Air Canada
  • 25/2-5/3
  • 4 total stops
  • 69h 20m total
  • London to Saint Lucia
Search Deals
20/4
  • 20/4
  • 2 total stops
  • 29h 41m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 25% potential increase in price (£192 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 17% potential price decrease (£86 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 22 January 2026.
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 6/5

09:20-19:00

1 stop14h 40m

Castries George F. L. Charle

Tue 19/5

16:20-09:20

1 stop12h 00m

£701

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 25/2

09:40-19:00

1 stop13h 20m

Castries George F. L. Charle

Wed 11/3

12:35-05:25

1 stop12h 50m

£705

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 3/3

08:00-19:00

1 stop15h 00m

Castries George F. L. Charle

Sun 15/3

12:35-05:25

1 stop12h 50m

£707

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 30/5

09:20-19:00

1 stop14h 40m

Castries George F. L. Charle

Sun 7/6

15:45-09:20

1 stop12h 35m

£714

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 5/2

13:05-15:05

2 stops30h 00m

Castries Hewanorra

Thu 12/2

16:25-11:40

1 stop15h 15m

£724

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 20/2

20:00-15:05

2 stops47h 05m

Castries Hewanorra

Mon 2/3

16:25-06:50

2 stops34h 25m

£725

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 15/2

08:55-15:05

1 stop34h 10m

Castries Hewanorra

Tue 3/3

16:25-11:40

1 stop15h 15m

£725

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 17/2

15:50-15:05

1 stop27h 15m

Castries Hewanorra

Wed 25/2

16:25-06:20

2 stops33h 55m

£725

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 26/4

15:35-13:35

1 stop27h 00m

Castries Hewanorra

Mon 11/5

14:35-12:35

1 stop17h 00m

£728

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 30/4

12:00-14:23

1 stop31h 23m

Castries Hewanorra

Thu 7/5

14:35-12:35

1 stop17h 00m

£730

Flights are sorted by cheapest return flights first.

Deals found on 21/1

Showing 1-10 of 37 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 £380). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £748). 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.

How often are flights from London to Saint Lucia delayed?

About 16% of weekly flights between London and Saint Lucia have experienced delays in the past year, with the average delay time being 149 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 Sunday 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 22 January 2026.
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
1,442 reviews
Check prices

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,442 reviews
KLM
7.7
Good
1,442 reviews
Check prices

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Finnair
7.6
Good
1,353 reviews
KLM
7.7
Good
1,442 reviews
Check prices

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Virgin Atlantic
7.5
Good
678 reviews
KLM
7.7
Good
1,442 reviews
Check prices

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Air Canada
7.1
Good
10,648 reviews
KLM
7.7
Good
1,442 reviews
Check prices

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
British Airways
6.7
Okay
7,690 reviews
KLM
7.7
Good
1,442 reviews
Check prices

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 and American Airlines can get you from London Heathrow Airport to Saint Lucia in just under 27h. Your travel time can differ by up to 3h. 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 £380). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £748). 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
Heathrow to Punta Cana flights
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Heathrow to Nassau flights
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Gatwick to Kingston flights
Heathrow to Luis Munoz Marin Intl flights
London City to Kingston flights
Gatwick to Bridgetown flights
Gatwick to Luis Munoz Marin Intl flights
Heathrow to St. George's flights
Stansted to Bridgetown flights
London City to Punta Cana flights
Heathrow to Port of Spain flights
Gatwick to Montego Bay flights
Gatwick to St. John's flights
Stansted to Montego Bay flights
Stansted to Punta Cana flights
London City to Montego Bay flights
London City to Luis Munoz Marin Intl flights
Heathrow to Castries flights
Stansted to Kingston flights
Luton to Punta Cana flights
Heathrow to St. John's flights
Gatwick to Port of Spain flights
Gatwick to Castries flights
Gatwick to St. George's flights
Heathrow to Roseau flights
London City to Castries flights
Heathrow to Santo Domingo flights
Luton to Montego Bay flights
Heathrow to Basseterre flights
Heathrow to Castries flights
Stansted to Luis Munoz Marin Intl flights
Gatwick to Havana flights
Gatwick to Santo Domingo flights
Heathrow to Willemstad flights
Heathrow to Kingstown flights
London City to Santo Domingo flights
Heathrow to Providenciales flights
Stansted to Santo Domingo flights
Gatwick to Nassau flights
Gatwick to Basseterre flights
Heathrow to George Town flights
London City to St. John's flights
Gatwick to Willemstad flights
Heathrow to Oranjestad flights
Stansted to Port of Spain 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 22 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£339Average£474FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£459Average£668FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£518Average£663FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£665Average£863FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£1,072Average£1,503FlexibilityNo 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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