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Cheap flights from London Heathrow Airport to Saint Lucia from £361

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 16/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
8 Jun — 15 Jun1
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 9 May 2026.

Mon 9/1109:40
LHR
-
UVF
2 stops33h 30m
Delta
Thu 19/1116:25
UVF
-
LHR
2 stops34h 25m
Delta
Deal found 6/5£732
Thu 29/1015:50
LHR
-
UVF
1 stop26h 36m
Delta
Thu 5/1116:41
UVF
-
LHR
1 stop33h 44m
Delta
Deal found 8/5£734
Thu 31/1210:45
LHR
-
UVF
1 stop32h 30m
Delta
Sat 9/116:25
UVF
-
LHR
1 stop36h 35m
Delta
Deal found 7/5£735
Fri 6/1112:55
LHR
-
UVF
2 stops28h 26m
British Airways
Sun 15/1116:50
UVF
-
LHR
2 stops33h 40m
British Airways
Deal found 7/5£740
Sat 7/1114:30
LHR
-
UVF
1 stop26h 51m
American Airlines
Fri 20/1116:50
UVF
-
LHR
1 stop14h 40m
American Airlines
Deal found 6/5£741
Sat 24/1017:35
LHR
-
UVF
2 stops24h 50m
American Airlines
Thu 5/1116:04
UVF
-
LHR
1 stop15h 36m
American Airlines
Deal found 8/5£743
Wed 16/909:55
LHR
-
UVF
1 stop32h 55m
American Airlines
Thu 1/1016:00
UVF
-
LHR
1 stop15h 35m
American Airlines
Deal found 6/5£744
Fri 4/1215:35
LHR
-
UVF
1 stop24h 54m
American Airlines
Mon 14/1216:53
UVF
-
LHR
1 stop14h 37m
American Airlines
Deal found 5/5£745
Tue 27/1009:45
LHR
-
UVF
1 stop31h 50m
American Airlines
Sun 8/1116:50
UVF
-
LHR
1 stop14h 40m
American Airlines
Deal found 8/5£746
Fri 6/1119:05
LHR
-
UVF
2 stops24h 45m
American Airlines
Sat 14/1116:50
UVF
-
LHR
1 stop34h 00m
American Airlines
Deal found 7/5£748
Sun 25/1018:00
LHR
-
UVF
1 stop25h 25m
Air Canada
Sun 1/1117:25
UVF
-
LHR
2 stops35h 55m
Air Canada
Deal found 6/5£749
Wed 16/911:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Sun 4/1012:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 7/5£788

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 9 May 2026.

Round-trip from

£734

One-way from

£361

Popular in

August

Cheapest in

November

Average price

£887
Delta
  • Delta
  • 27/10-9/11
  • 4 total stops
  • 66h 41m total
  • London to Saint Lucia
Search Deals
16/6
  • 16/6
  • 3 total stops
  • 50h 50m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£154 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease (£51 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 9 May 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Saint Lucia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 29/10

15:50-14:26

1 stop26h 36m

Castries Hewanorra

Wed 4/11

16:41-06:50

2 stops34h 09m

£734

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 29/10

15:50-14:26

1 stop26h 36m

Castries Hewanorra

Sun 8/11

16:41-09:00

1 stop36h 19m

£734

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 27/10

15:50-14:26

1 stop26h 36m

Castries Hewanorra

Mon 9/11

16:25-09:00

1 stop36h 35m

£734

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 27/10

10:10-14:26

2 stops32h 16m

Castries Hewanorra

Thu 5/11

16:41-06:50

2 stops34h 09m

£734
Fastest return journey

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sun 6/9

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Sun 20/9

12:35-06:15

1 stop12h 40m

£830

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 26/10

10:10-14:26

2 stops32h 16m

Castries Hewanorra

Mon 2/11

16:41-06:50

2 stops34h 09m

£890

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 23/10

17:35-13:25

2 stops24h 50m

Castries Hewanorra

Sat 31/10

14:20-11:15

2 stops16h 55m

£915

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 1/9

09:20-14:08

1 stop33h 48m

Castries Hewanorra

Thu 10/9

15:38-13:15

1 stop16h 37m

£925

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 19/6

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Fri 26/6

12:35-06:15

1 stop12h 40m

£959

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 4/9

18:45-13:40

3 stops47h 55m

Castries Hewanorra

Fri 11/9

15:15-19:25

2 stops23h 10m

£1,018

Flights are sorted by cheapest return flights first.

Deals found on 8/5

Showing 1-10 of 32 resultsSorted by cheapest first
1
2
3
4

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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £495). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £723). 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.

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 9 May 2026.
Read reviews from past customers who have flown with KLM,Finnair, andJetBlue 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
7.8
Good
1,513 reviews
Check prices

Crew

8.4

Boarding

7.8

Comfort

7.7

Food

7.3

Overall

7.8

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,513 reviews
KLM
7.8
Good
1,513 reviews
Check prices

Crew

8.4

Boarding

7.8

Comfort

7.7

Food

7.3

Overall

7.8

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Finnair
7.6
Good
1,393 reviews
KLM
7.8
Good
1,513 reviews
Check prices

Crew

8.4

Boarding

7.8

Comfort

7.7

Food

7.3

Overall

7.8

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
JetBlue
7.2
Good
2,977 reviews
KLM
7.8
Good
1,513 reviews
Check prices

Crew

8.4

Boarding

7.8

Comfort

7.7

Food

7.3

Overall

7.8

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Air Canada
7.1
Good
11,012 reviews
KLM
7.8
Good
1,513 reviews
Check prices

Crew

8.4

Boarding

7.8

Comfort

7.7

Food

7.3

Overall

7.8

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
British Airways
6.7
Okay
7,964 reviews
KLM
7.8
Good
1,513 reviews
Check prices

Crew

8.4

Boarding

7.8

Comfort

7.7

Food

7.3

Overall

7.8

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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 26h 36m. 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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £495). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £723). 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 Montego Bay flights
Heathrow to Bridgetown flights
Heathrow to Kingston flights
Stansted to Montego Bay flights
Gatwick to Bridgetown flights
Heathrow to Punta Cana flights
Stansted to Bridgetown flights
Gatwick to Punta Cana flights
Stansted to Kingston flights
Gatwick to Kingston flights
London City to Montego Bay flights
Gatwick to Montego Bay flights
Stansted to Punta Cana flights
London City to Kingston flights
Luton to Montego Bay flights
London City to Bridgetown flights
Heathrow to Nassau flights
Luton to Punta Cana flights
Heathrow to St. George's flights
Heathrow to Castries flights
Heathrow to Santo Domingo flights
Heathrow to St. John's flights
London City to Punta Cana flights
Gatwick to Santo Domingo flights
Gatwick to Castries flights
Heathrow to Port of Spain flights
Gatwick to St. George's flights
Gatwick to Havana flights
Stansted to Santo Domingo flights
Heathrow to Roseau flights
Heathrow to Kingstown flights
Heathrow to Luis Munoz Marin Intl flights
Gatwick to St. John's flights
Gatwick to Nassau flights
Gatwick to Port of Spain flights
Gatwick to Luis Munoz Marin Intl flights
Gatwick to Willemstad flights
Stansted to Nassau flights
London City to Santo Domingo flights
Heathrow to Castries flights
Stansted to Port of Spain flights
London City to Castries flights
Heathrow to Willemstad flights
Stansted to Luis Munoz Marin Intl flights
London City to Luis Munoz Marin Intl flights
Heathrow to Havana flights
Gatwick to Basseterre flights
Gatwick to Roseau flights
Heathrow to Basseterre flights

Top 6 airlines flying from Heathrow to Saint Lucia

Discover the top 6 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 9 May 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£497Average£847FlexibilityNo cancel feeOn-time70%
Search British Airways flights
JetBlueCheapest£527Average£825FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Air CanadaCheapest£628Average£768FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£683Average£898FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£699Average£949FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£1,144Average£1,484FlexibilityNo 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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