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Cheap flights from London Heathrow Airport to Saint Lucia from £459

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 25/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
9 Mar — 16 Mar1
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 7 February 2026.

Tue 10/309:40
LHR
-
SLU
1 stop12h 45m
Multiple Airlines
Tue 17/316:20
SLU
-
LHR
1 stop13h 15m
Multiple Airlines
Deal found 6/2£642
Tue 3/1108:00
LHR
-
SLU
1 stop14h 25m
Multiple Airlines
Tue 10/1112:35
SLU
-
LHR
1 stop12h 50m
Multiple Airlines
Deal found 4/2£654
Thu 5/313:20
LHR
-
SLU
1 stop29h 55m
Multiple Airlines
Thu 12/315:45
SLU
-
LHR
1 stop14h 10m
Multiple Airlines
Deal found 5/2£668
Tue 10/211:10
LHR
-
UVF
1 stop33h 10m
Air Canada
Thu 19/217:15
UVF
-
LHR
2 stops23h 20m
Air Canada
Deal found 6/2£692
Mon 23/308:05
LHR
-
UVF
1 stop34h 13m
JetBlue
Mon 30/315:49
UVF
-
LHR
1 stop23h 56m
JetBlue
Deal found 6/2£693
Tue 31/312:05
LHR
-
UVF
1 stop32h 15m
Air Canada
Mon 6/416:15
UVF
-
LHR
2 stops23h 45m
Air Canada
Deal found 6/2£695
Mon 11/508:15
LHR
-
UVF
1 stop35h 12m
JetBlue
Thu 21/514:24
UVF
-
LHR
1 stop25h 21m
JetBlue
Deal found 4/2£696
Tue 10/312:20
LHR
-
UVF
1 stop30h 38m
JetBlue
Tue 17/315:49
UVF
-
LHR
1 stop25h 51m
JetBlue
Deal found 6/2£699
Wed 25/209:40
LHR
-
SLU
1 stop13h 20m
Multiple Airlines
Wed 11/315:45
SLU
-
LHR
1 stop14h 10m
Multiple Airlines
Deal found 6/2£702
Mon 20/417:15
LHR
-
UVF
2 stops51h 05m
Air Canada
Tue 19/515:15
UVF
-
LHR
1 stop15h 35m
Air Canada
Deal found 4/2£702
Thu 2/417:40
LHR
-
UVF
1 stop26h 30m
Air Canada
Fri 10/416:15
UVF
-
LHR
1 stop14h 35m
Air Canada
Deal found 6/2£704
Mon 23/313:25
LHR
-
UVF
2 stops54h 00m
Air Canada
Mon 30/316:20
UVF
-
LHR
1 stop35h 15m
Air Canada
Deal found 6/2£705

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 7 February 2026.

Round-trip from

£642

One-way from

£459

Popular in

April

Cheapest in

November

Average price

£700
10/3-17/3
  • 10/3-17/3
  • 2 total stops
  • 26h 00m total
  • London to Saint Lucia
Search Deals
25/2
  • 25/2
  • 2 total stops
  • 30h 20m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 25% potential increase in price (£187 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 17% potential price decrease (£84 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 7 February 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

Tue 10/3

09:40-18:25

1 stop12h 45m

Castries George F. L. Charle

Tue 17/3

16:20-09:35

1 stop13h 15m

£642

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 5/3

13:20-15:15

1 stop29h 55m

Castries George F. L. Charle

Thu 12/3

15:45-09:55

1 stop14h 10m

£668

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 10/3

12:20-14:58

1 stop30h 38m

Castries Hewanorra

Tue 17/3

15:49-21:40

1 stop25h 51m

£699

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 25/2

09:40-19:00

1 stop13h 20m

Castries George F. L. Charle

Wed 11/3

15:45-09:55

1 stop14h 10m

£702

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 2/4

17:40-15:10

1 stop26h 30m

Castries Hewanorra

Fri 10/4

16:15-11:50

1 stop14h 35m

£704

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 23/3

13:25-15:25

2 stops54h 00m

Castries Hewanorra

Mon 30/3

16:20-10:00

2 stops36h 40m

£708

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 23/2

14:50-16:20

2 stops53h 30m

Castries Hewanorra

Wed 25/3

16:20-20:35

2 stops24h 15m

£710

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 18/3

12:00-15:25

2 stops31h 25m

Castries Hewanorra

Tue 9/6

15:05-08:35

2 stops36h 30m

£711

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 23/3

19:30-15:25

2 stops47h 55m

Castries Hewanorra

Mon 30/3

16:20-06:35

1 stop33h 15m

£713

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 7/4

08:45-15:20

2 stops35h 35m

Castries Hewanorra

Wed 22/4

16:20-21:00

2 stops47h 40m

£718

Flights are sorted by cheapest return flights first.

Deals found on 4/2

Showing 1-10 of 39 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 £374). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £782). 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 7 February 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
1,450 reviews
Check prices

Overall

7.7

Food

7.3

Boarding

7.8

Entertainment

7.1

Crew

8.4

Comfort

7.6

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

Overall

7.7

Food

7.3

Boarding

7.8

Entertainment

7.1

Crew

8.4

Comfort

7.6

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
1,357 reviews
KLM
7.7
Good
1,450 reviews
Check prices

Overall

7.7

Food

7.3

Boarding

7.8

Entertainment

7.1

Crew

8.4

Comfort

7.6

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
1,450 reviews
Check prices

Overall

7.7

Food

7.3

Boarding

7.8

Entertainment

7.1

Crew

8.4

Comfort

7.6

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
10,697 reviews
KLM
7.7
Good
1,450 reviews
Check prices

Overall

7.7

Food

7.3

Boarding

7.8

Entertainment

7.1

Crew

8.4

Comfort

7.6

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
7,719 reviews
KLM
7.7
Good
1,450 reviews
Check prices

Overall

7.7

Food

7.3

Boarding

7.8

Entertainment

7.1

Crew

8.4

Comfort

7.6

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?

    JetBlue and Air Canada can get you from London Heathrow Airport to Saint Lucia in just under 26h 30m. Your travel time can differ by up to 4h 08m. 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 £374). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £782). 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 St. George's flights
Stansted to Montego Bay flights
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Gatwick to St. John's flights
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Heathrow to St. John's flights
Heathrow to Luis Munoz Marin Intl flights
Stansted to Punta Cana flights
Stansted to Kingston flights
Heathrow to Castries flights
Gatwick to Castries flights
Luton to Punta Cana flights
London City to Punta Cana flights
Gatwick to Luis Munoz Marin Intl flights
Heathrow to Kingstown flights
Luton to Montego Bay flights
Heathrow to Willemstad flights
Heathrow to Port of Spain flights
Stansted to Luis Munoz Marin Intl flights
Gatwick to St. George's flights
Gatwick to Willemstad flights
London City to Luis Munoz Marin Intl flights
Gatwick to Port of Spain flights
Heathrow to Santo Domingo flights
Gatwick to Havana flights
Heathrow to Pointe-à-Pitre flights
Gatwick to Santo Domingo flights
Gatwick to Nassau flights
Heathrow to Oranjestad flights
London City to St. John's flights
Heathrow to Roseau flights
Heathrow to George Town flights
Gatwick to Pointe-à-Pitre flights
Heathrow to Providenciales flights
Heathrow to Basseterre flights
Heathrow to Castries flights
Gatwick to Basseterre 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 7 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£336Average£469FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£465Average£690FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£512Average£658FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£657Average£853FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£1,060Average£1,467FlexibilityNo 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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