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Cheap flights from London Heathrow Airport to Saint Lucia from £463

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 15/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
28 May — 4 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 28 April 2026.

Thu 5/1112:30
LHR
-
UVF
1 stop30h 56m
Delta
Wed 18/1116:25
UVF
-
LHR
2 stops34h 25m
Delta
Deal found 24/4£732
Mon 26/1020:00
LHR
-
UVF
2 stops46h 26m
Delta
Thu 29/1015:41
UVF
-
LHR
1 stop15h 59m
Delta
Deal found 23/4£734
Thu 14/515:15
LHR
-
UVF
1 stop27h 50m
Delta
Wed 27/515:25
UVF
-
LHR
2 stops34h 20m
Delta
Deal found 27/4£735
Thu 22/1017:05
LHR
-
UVF
2 stops25h 20m
American Airlines
Tue 3/1116:50
UVF
-
LHR
2 stops23h 10m
American Airlines
Deal found 23/4£741
Fri 4/1214:30
LHR
-
UVF
1 stop26h 49m
American Airlines
Mon 14/1216:05
UVF
-
LHR
1 stop15h 35m
American Airlines
Deal found 24/4£744
Mon 7/1214:30
LHR
-
UVF
1 stop26h 49m
American Airlines
Mon 14/1216:05
UVF
-
LHR
1 stop15h 35m
American Airlines
Deal found 23/4£746
Thu 10/917:35
LHR
-
UVF
2 stops25h 15m
American Airlines
Thu 24/916:00
UVF
-
LHR
2 stops24h 40m
American Airlines
Deal found 27/4£747
Wed 30/915:35
LHR
-
UVF
1 stop27h 15m
American Airlines
Wed 7/1016:00
UVF
-
LHR
1 stop15h 35m
American Airlines
Deal found 26/4£748
Tue 8/909:55
LHR
-
UVF
1 stop32h 55m
American Airlines
Thu 17/916:00
UVF
-
LHR
2 stops22h 45m
American Airlines
Deal found 25/4£749
Thu 11/610:45
LHR
-
SLU
1 stop13h 15m
Multiple Airlines
Thu 18/612:35
SLU
-
LHR
1 stop12h 15m
Multiple Airlines
Deal found 27/4£821
Wed 10/611:10
LHR
-
SLU
1 stop29h 55m
Multiple Airlines
Wed 17/615:45
SLU
-
LHR
1 stop33h 05m
Multiple Airlines
Deal found 26/4£837
Fri 2/1011:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Fri 16/1012:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 27/4£896

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 28 April 2026.

Round-trip from

£735

One-way from

£463

Popular in

August

Cheapest in

November
Delta
  • Delta
  • 14/5-27/5
  • 3 total stops
  • 62h 10m total
  • London to Saint Lucia
Search Deals
15/8
  • 15/8
  • 2 total stops
  • 35h 00m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£111 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

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 28 April 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 14/5

15:15-14:05

1 stop27h 50m

Castries Hewanorra

Wed 27/5

15:25-06:45

2 stops34h 20m

£735
Fastest return journey

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 11/6

10:45-19:00

1 stop13h 15m

Castries George F. L. Charle

Thu 18/6

12:35-05:50

1 stop12h 15m

£821

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 10/6

11:10-12:05

1 stop29h 55m

Castries George F. L. Charle

Wed 17/6

15:45-05:50

1 stop33h 05m

£837

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 25/10

16:50-14:26

2 stops49h 36m

Castries Hewanorra

Tue 3/11

16:41-09:00

1 stop36h 19m

£889

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 25/10

16:50-14:26

2 stops49h 36m

Castries Hewanorra

Wed 4/11

16:41-06:50

2 stops34h 09m

£889

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 29/5

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Fri 19/6

12:35-06:15

1 stop12h 40m

£910

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 18/5

15:20-14:05

2 stops27h 45m

Castries Hewanorra

Fri 29/5

15:05-21:00

2 stops24h 55m

£927

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 14/8

09:15-13:13

1 stop32h 58m

Castries Hewanorra

Fri 4/9

15:14-12:50

1 stop16h 36m

£978

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 26/5

09:55-14:05

2 stops33h 10m

Castries Hewanorra

Tue 2/6

15:25-13:15

1 stop16h 50m

£1,003

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sat 24/10

09:20-14:26

1 stop34h 06m

Castries Hewanorra

Wed 4/11

16:41-06:25

1 stop33h 44m

£1,014

Flights are sorted by cheapest return flights first.

Deals found on 27/4

Showing 1-10 of 33 resultsSorted by cheapest first
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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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £497). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £726). 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 0% of weekly flights between London and Saint Lucia have experienced delays in the past year, with the average delay time being 0 minutes.

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

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon 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.

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 28 April 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
1,510 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

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
1,510 reviews
KLM
7.8
Good
1,510 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

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
1,392 reviews
KLM
7.8
Good
1,510 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

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
2,968 reviews
KLM
7.8
Good
1,510 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

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
10,977 reviews
KLM
7.8
Good
1,510 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

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
7,931 reviews
KLM
7.8
Good
1,510 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

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, Air Canada, and American Airlines can get you from London Heathrow Airport to Saint Lucia in just under 27h 45m. Your travel time can differ by up to 5h 13m. 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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £497). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £726). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
Gatwick to Bridgetown flights
Stansted to Montego Bay flights
Heathrow to Punta Cana flights
London City to Montego Bay flights
Gatwick to Punta Cana flights
Stansted to Kingston flights
London City to Kingston flights
Stansted to Bridgetown flights
Gatwick to Kingston flights
Stansted to Punta Cana flights
Luton to Montego Bay flights
Heathrow to Castries flights
Gatwick to Montego Bay flights
Heathrow to St. George's flights
London City to Bridgetown flights
Gatwick to Castries flights
Heathrow to Kingstown flights
Heathrow to Nassau flights
Heathrow to St. John's flights
Luton to Punta Cana flights
Gatwick to St. John's flights
London City to Punta Cana flights
Heathrow to Santo Domingo flights
Gatwick to St. George's flights
Heathrow to Port of Spain flights
Gatwick to Port of Spain flights
Gatwick to Santo Domingo flights
Heathrow to Roseau flights
London City to Castries flights
Gatwick to Havana flights
Gatwick to Willemstad flights
Heathrow to Willemstad flights
Heathrow to Castries flights
London City to Santo Domingo flights
Stansted to Santo Domingo flights
Stansted to Port of Spain flights
Heathrow to Luis Munoz Marin Intl flights
Gatwick to Kingstown flights
Gatwick to Nassau flights
Stansted to Luis Munoz Marin Intl flights
Gatwick to Luis Munoz Marin Intl flights
Heathrow to Oranjestad flights
Stansted to Nassau flights
Heathrow to Havana flights
Gatwick to Oranjestad 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 28 April 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£499Average£850FlexibilityNo cancel feeOn-time70%
Search British Airways flights
JetBlueCheapest£529Average£828FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Air CanadaCheapest£630Average£772FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£686Average£902FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£702Average£953FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£1,149Average£1,490FlexibilityNo 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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