Find flights
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Saint Lucia from £293

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 31/7. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
8 Jul — 15 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 8 June 2026.

Tue 7/711:55
LHR
-
UVF
1 stop29h 42m
JetBlue
Sun 12/713:47
UVF
-
LHR
1 stop25h 58m
JetBlue
Deal found 3/6£655
Tue 7/708:15
LHR
-
UVF
1 stop36h 12m
JetBlue
Mon 20/716:40
UVF
-
LHR
1 stop23h 05m
JetBlue
Deal found 5/6£681
Wed 16/911:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Wed 30/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 6/6£717
Sat 7/1112:05
LHR
-
UVF
2 stops56h 20m
Air Canada
Sun 15/1117:25
UVF
-
LHR
2 stops23h 10m
Air Canada
Deal found 6/6£730
Thu 27/816:20
LHR
-
UVF
2 stops26h 54m
Delta
Mon 7/915:34
UVF
-
LHR
2 stops34h 11m
Delta
Deal found 7/6£736
Tue 1/915:50
LHR
-
UVF
2 stops27h 24m
Delta
Tue 15/915:33
UVF
-
LHR
1 stop16h 42m
Delta
Deal found 7/6£737
Sun 22/1112:30
LHR
-
UVF
1 stop30h 40m
Delta
Wed 2/1216:25
UVF
-
LHR
2 stops34h 25m
Delta
Deal found 6/6£740
Mon 31/813:25
LHR
-
UVF
1 stop29h 49m
Delta
Wed 9/915:33
UVF
-
LHR
1 stop16h 42m
Delta
Deal found 4/6£741
Sun 25/1015:00
LHR
-
UVF
1 stop28h 25m
Air Canada
Sun 1/1117:25
UVF
-
LHR
1 stop35h 05m
Air Canada
Deal found 4/6£750
Sat 24/1020:05
LHR
-
UVF
2 stops48h 20m
SWISS
Thu 5/1117:25
UVF
-
LHR
2 stops23h 10m
SWISS
Deal found 6/6£751
Sun 26/711:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Mon 7/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 7/6£774
Sat 26/911:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Mon 5/1012:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 8/6£777

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 8 June 2026.

Round-trip from

£655

One-way from

£293

Popular in

August

Cheapest in

November

Average price

£651
JetBlue
  • JetBlue
  • 7/7-12/7
  • 2 total stops
  • 55h 40m total
  • London to Saint Lucia
Search Deals
31/7
  • 31/7
  • 3 total stops
  • 48h 30m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£165 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease (£53 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 8 June 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

Sun 22/11

15:50-15:10

1 stop27h 20m

Castries Hewanorra

Wed 2/12

16:25-11:40

1 stop15h 15m

£740

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 31/8

13:25-14:14

1 stop29h 49m

Castries Hewanorra

Thu 10/9

15:33-06:25

1 stop33h 52m

£741

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 5/10

15:15-14:26

1 stop28h 11m

Castries Hewanorra

Mon 12/10

15:41-13:15

1 stop16h 34m

£771

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 2/11

09:40-15:26

2 stops33h 46m

Castries Hewanorra

Mon 16/11

16:25-20:00

2 stops23h 35m

£893

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 23/11

15:50-15:10

1 stop27h 20m

Castries Hewanorra

Tue 1/12

16:25-06:50

2 stops34h 25m

£896

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 29/9

15:50-14:08

2 stops27h 18m

Castries Hewanorra

Mon 5/10

15:33-20:10

2 stops23h 37m

£898
Fastest return journey

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 21/7

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Fri 31/7

12:35-06:15

1 stop12h 40m

£938

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 19/8

12:50-14:14

2 stops30h 24m

Castries Hewanorra

Wed 26/8

15:34-06:45

2 stops34h 11m

£942

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 30/8

15:15-14:14

1 stop27h 59m

Castries Hewanorra

Wed 9/9

15:33-06:25

1 stop33h 52m

£949

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 16/7

10:45-19:00

1 stop13h 15m

Castries George F. L. Charle

Thu 23/7

09:10-05:50

1 stop15h 40m

£992

Flights are sorted by cheapest return flights first.

Deals found on 7/6

Showing 1-10 of 36 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £496). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £758). 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 8 June 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
1,527 reviews
Check prices

Entertainment

7.2

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

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
1,527 reviews
KLM
7.8
Good
1,527 reviews
Check prices

Entertainment

7.2

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

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
7.7
Good
1,405 reviews
KLM
7.8
Good
1,527 reviews
Check prices

Entertainment

7.2

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

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
11,149 reviews
KLM
7.8
Good
1,527 reviews
Check prices

Entertainment

7.2

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

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
7.1
Good
2,980 reviews
KLM
7.8
Good
1,527 reviews
Check prices

Entertainment

7.2

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

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
8,031 reviews
KLM
7.8
Good
1,527 reviews
Check prices

Entertainment

7.2

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

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 can get you from London Heathrow Airport to Saint Lucia in just under 27h 20m. 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 £496). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £758). 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
Gatwick to Bridgetown flights
Heathrow to Kingston flights
Heathrow to Punta Cana flights
London City to Montego Bay flights
Stansted to Bridgetown flights
London City to Bridgetown flights
Gatwick to Montego Bay flights
Gatwick to Kingston flights
Gatwick to Punta Cana flights
London City to Kingston flights
Stansted to Kingston flights
Stansted to Punta Cana flights
Heathrow to Castries flights
Heathrow to Nassau flights
Luton to Montego Bay flights
Gatwick to Castries flights
Stansted to Montego Bay flights
Luton to Punta Cana flights
Heathrow to Port of Spain flights
Heathrow to St. George's flights
London City to Punta Cana flights
Gatwick to St. John's flights
Heathrow to Castries flights
Stansted to Port of Spain flights
Heathrow to St. John's flights
Heathrow to Santo Domingo flights
Gatwick to St. George's flights
Gatwick to Port of Spain flights
Gatwick to Santo Domingo flights
Heathrow to Roseau flights
Heathrow to Luis Munoz Marin Intl flights
Gatwick to Havana flights
Gatwick to Willemstad flights
Gatwick to Luis Munoz Marin Intl flights
London City to Castries flights
London City to Santo Domingo flights
Heathrow to George Town flights
Stansted to Santo Domingo flights
Heathrow to Willemstad flights
Heathrow to Kingstown flights
Gatwick to Scarborough flights
London City to Luis Munoz Marin Intl flights
Heathrow to Pointe-à-Pitre flights
Gatwick to Nassau flights
Heathrow to Oranjestad flights
Heathrow to Basseterre flights
Heathrow to Simpson Bay 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 8 June 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£504Average£856FlexibilityNo cancel feeOn-time70%
Search British Airways flights
JetBlueCheapest£538Average£841FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Air CanadaCheapest£640Average£783FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£697Average£915FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£713Average£968FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£1,167Average£1,551FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.