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Cheap flights from London Heathrow Airport to Saint Lucia from £367

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
25 Jun — 2 Jul1
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 26 May 2026.

Sun 15/1108:15
LHR
-
UVF
1 stop35h 54m
JetBlue
Tue 24/1117:01
UVF
-
LHR
1 stop24h 39m
JetBlue
Deal found 25/5£674
Sun 13/1218:00
LHR
-
UVF
1 stop26h 25m
Air Canada
Sun 17/117:25
UVF
-
LHR
1 stop33h 05m
Air Canada
Deal found 23/5£726
Sun 6/1211:10
LHR
-
UVF
1 stop33h 15m
Air Canada
Sun 17/117:25
UVF
-
LHR
1 stop35h 05m
Air Canada
Deal found 23/5£727
Wed 28/1018:00
LHR
-
UVF
1 stop25h 25m
Air Canada
Sun 8/1117:25
UVF
-
LHR
2 stops23h 10m
Air Canada
Deal found 23/5£731
Tue 24/1115:50
LHR
-
UVF
1 stop27h 20m
Delta
Wed 2/1216:25
UVF
-
LHR
1 stop35h 25m
Delta
Deal found 21/5£732
Tue 29/909:40
LHR
-
UVF
2 stops33h 28m
Delta
Thu 15/1015:41
UVF
-
LHR
1 stop16h 34m
Delta
Deal found 24/5£733
Mon 1/618:35
LHR
-
UVF
2 stops24h 30m
Delta
Mon 8/615:33
UVF
-
LHR
1 stop14h 47m
Delta
Deal found 25/5£734
Sat 17/1014:00
LHR
-
UVF
2 stops28h 25m
American Airlines
Sun 25/1014:20
UVF
-
LHR
1 stop17h 10m
American Airlines
Deal found 21/5£740
Mon 28/915:40
LHR
-
UVF
1 stop27h 14m
American Airlines
Thu 15/1016:00
UVF
-
LHR
1 stop15h 35m
American Airlines
Deal found 24/5£742
Sun 8/1117:00
LHR
-
UVF
2 stops26h 00m
British Airways
Sun 15/1116:04
UVF
-
LHR
1 stop37h 11m
British Airways
Deal found 22/5£742
Thu 1/1009:55
LHR
-
UVF
1 stop32h 55m
American Airlines
Thu 15/1014:20
UVF
-
LHR
1 stop17h 15m
American Airlines
Deal found 21/5£744
Tue 25/811:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Fri 11/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 22/5£786

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 26 May 2026.

Round-trip from

£674

One-way from

£367

Popular in

August

Cheapest in

November

Average price

£894
JetBlue
  • JetBlue
  • 15/11-24/11
  • 2 total stops
  • 60h 33m total
  • London to Saint Lucia
Search Deals
16/6
  • 16/6
  • 3 total stops
  • 47h 50m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£161 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 26 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

Mon 1/6

18:35-14:05

2 stops24h 30m

Castries Hewanorra

Mon 8/6

15:33-11:20

1 stop14h 47m

£734
Fastest return journey

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 25/8

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Fri 11/9

12:35-06:15

1 stop12h 40m

£786

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 25/8

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Sat 5/9

12:35-06:15

1 stop12h 40m

£926

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 14/8

09:15-13:13

1 stop32h 58m

Castries Hewanorra

Fri 4/9

14:54-21:40

2 stops25h 46m

£952

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 20/10

09:35-18:25

1 stop13h 50m

Castries George F. L. Charle

Tue 3/11

16:20-09:55

1 stop13h 35m

£1,009

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sun 25/10

08:00-19:00

1 stop15h 00m

Castries George F. L. Charle

Fri 30/10

12:35-13:55

2 stops21h 20m

£1,060

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 7/7

08:15-12:37

1 stop33h 22m

Castries Hewanorra

Tue 21/7

16:40-20:45

1 stop23h 05m

£1,066

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sat 20/6

08:40-13:40

3 stops34h 00m

Castries Hewanorra

Fri 26/6

15:15-19:25

2 stops23h 10m

£1,069

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sun 21/6

12:40-18:25

3 stops34h 45m

Castries George F. L. Charle

Sun 28/6

12:35-21:00

3 stops27h 25m

£1,092

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 21/6

08:15-12:44

1 stop33h 29m

Castries Hewanorra

Sun 28/6

16:37-20:45

1 stop23h 08m

£1,106

Flights are sorted by cheapest return flights first.

Deals found on 21/5

Showing 1-10 of 29 resultsSorted by cheapest first
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2
3

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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £491). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £749). 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 26 May 2026.
Read reviews from past customers who have flown with KLM,Finnair, andAir Canada 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
1,522 reviews
Check prices

Boarding

7.8

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.2

Food

7.3

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
1,522 reviews
KLM
7.8
Good
1,522 reviews
Check prices

Boarding

7.8

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.2

Food

7.3

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
7.7
Good
1,399 reviews
KLM
7.8
Good
1,522 reviews
Check prices

Boarding

7.8

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.2

Food

7.3

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
11,091 reviews
KLM
7.8
Good
1,522 reviews
Check prices

Boarding

7.8

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.2

Food

7.3

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
7.1
Good
2,981 reviews
KLM
7.8
Good
1,522 reviews
Check prices

Boarding

7.8

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.2

Food

7.3

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
8,005 reviews
KLM
7.8
Good
1,522 reviews
Check prices

Boarding

7.8

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.2

Food

7.3

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 24h 30m. 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £491). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £749). 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
Gatwick to Bridgetown flights
London City to Montego Bay flights
Heathrow to Punta Cana flights
Stansted to Bridgetown flights
Gatwick to Kingston flights
Stansted to Kingston flights
Gatwick to Punta Cana flights
Stansted to Montego Bay flights
Luton to Montego Bay flights
London City to Kingston flights
Stansted to Punta Cana flights
Heathrow to Nassau flights
London City to Bridgetown flights
Gatwick to Montego Bay flights
Heathrow to Castries flights
London City to Punta Cana flights
Heathrow to Kingstown flights
Luton to Punta Cana flights
Heathrow to St. John's flights
Gatwick to Castries flights
Heathrow to Port of Spain flights
Heathrow to Willemstad flights
Heathrow to St. George's flights
Heathrow to Roseau flights
Gatwick to Nassau flights
Gatwick to Willemstad flights
Gatwick to Havana flights
Gatwick to St. John's flights
Heathrow to Luis Munoz Marin Intl flights
Heathrow to Santo Domingo flights
Heathrow to Castries flights
Stansted to Nassau flights
Stansted to Port of Spain flights
Gatwick to Santo Domingo flights
Gatwick to Port of Spain flights
Heathrow to Pointe-à-Pitre flights
Stansted to Santo Domingo flights
Gatwick to Castries flights
Gatwick to Luis Munoz Marin Intl flights
Gatwick to Kingstown flights
Heathrow to Havana flights
Gatwick to St. George's flights
Gatwick to Basseterre flights
London City to Santo Domingo 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 26 May 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£498Average£847FlexibilityNo cancel feeOn-time70%
Search British Airways flights
JetBlueCheapest£531Average£831FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Air CanadaCheapest£633Average£774FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£689Average£905FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£705Average£957FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£1,153Average£1,533FlexibilityNo 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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