£419+ Cheap Flights from London Heathrow Airport to Saint Lucia | Cheapflights

English

Search for a country or language

Cheap flight deals from Heathrow to Saint Lucia

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 10 June 2026.

Thu 3/910:45

LHR

-

SLU

1 stop13h 15m

Multiple Airlines

Thu 17/912:35

SLU

-

LHR

1 stop12h 15m

Multiple Airlines

Deal found 9/6£657

Thu 12/1109:00

LHR

-

UVF

2 stops35h 25m

Air Canada

Thu 26/1117:25

UVF

-

LHR

1 stop35h 05m

Air Canada

Deal found 10/6£704

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£715

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£772

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£775

Fri 24/711:10

LHR

-

SLU

1 stop12h 50m

Multiple Airlines

Sun 6/912:35

SLU

-

LHR

1 stop12h 40m

Multiple Airlines

Deal found 6/6£798

Mon 9/1109:40

LHR

-

SLU

1 stop13h 15m

Multiple Airlines

Mon 16/1116:50

SLU

-

LHR

1 stop13h 05m

Multiple Airlines

Deal found 10/6£832

Sun 26/711:10

LHR

-

SLU

1 stop12h 50m

Multiple Airlines

Fri 4/912:35

SLU

-

LHR

1 stop12h 40m

Multiple Airlines

Deal found 10/6£841

Sat 25/711:10

LHR

-

SLU

1 stop12h 50m

Multiple Airlines

Sun 6/912:35

SLU

-

LHR

1 stop12h 40m

Multiple Airlines

Deal found 6/6£842

Fri 31/711:10

LHR

-

SLU

1 stop12h 50m

Multiple Airlines

Sun 6/912:35

SLU

-

LHR

1 stop12h 40m

Multiple Airlines

Deal found 6/6£843

Mon 13/711:10

LHR

-

SLU

1 stop12h 50m

Multiple Airlines

Fri 4/912:35

SLU

-

LHR

1 stop12h 40m

Multiple Airlines

Deal found 8/6£843

Wed 5/811:10

LHR

-

SLU

1 stop12h 50m

Multiple Airlines

Wed 19/812:35

SLU

-

LHR

1 stop12h 40m

Multiple Airlines

Deal found 10/6£850

Best flights from Heathrow to Saint Lucia
Discover carefully curated flight deals from Heathrow to Saint Lucia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 June 2026.

Mon 21/916:20

LHR

-

UVF

2 stops26h 48m

Delta

Sat 3/1015:33

UVF

-

LHR

1 stop16h 42m

Delta

Deal found 7/6£735

Fri 3/711:10

LHR

-

SLU

1 stop12h 50m

Multiple Airlines

Fri 10/712:35

SLU

-

LHR

1 stop12h 40m

Multiple Airlines

Deal found 10/6£911

Fri 25/906:50

LHR

-

UVF

2 stops35h 41m

United Airlines

Sat 10/1014:35

UVF

-

LHR

1 stop25h 45m

United Airlines

Deal found 9/6£969

Sun 22/1115:50

LHR

-

UVF

1 stop27h 20m

Delta

Wed 2/1216:25

UVF

-

LHR

1 stop15h 15m

Delta

Deal found 6/6£738

Mon 5/1015:15

LHR

-

UVF

1 stop28h 11m

Delta

Mon 12/1015:41

UVF

-

LHR

1 stop16h 34m

Delta

Deal found 8/6£769

Sat 1/811:10

LHR

-

SLU

1 stop12h 50m

Multiple Airlines

Mon 10/812:35

SLU

-

LHR

1 stop12h 40m

Multiple Airlines

Deal found 7/6£952

Sat 26/911:45

LHR

-

UVF

2 stops31h 23m

Delta

Sat 3/1015:33

UVF

-

LHR

1 stop16h 42m

Delta

Deal found 7/6£890

Wed 8/711:10

LHR

-

SLU

1 stop12h 50m

Multiple Airlines

Wed 5/812:35

SLU

-

LHR

1 stop12h 40m

Multiple Airlines

Deal found 6/6£997

Mon 23/1115:50

LHR

-

UVF

1 stop27h 20m

Delta

Tue 1/1216:25

UVF

-

LHR

2 stops34h 25m

Delta

Deal found 6/6£894

Mon 9/1110:10

LHR

-

UVF

2 stops33h 00m

Delta

Thu 19/1116:25

UVF

-

LHR

1 stop15h 15m

Delta

Deal found 5/6£896

Thu 24/916:50

LHR

-

SLU

3 stops26h 45m

Multiple Airlines

Sun 4/1018:55

SLU

-

LHR

3 stops34h 05m

Multiple Airlines

Deal found 9/6£1,106

Thu 10/911:15

LHR

-

UVF

1 stop31h 53m

Delta

Sat 10/1015:41

UVF

-

LHR

1 stop16h 34m

Delta

Deal found 10/6£928

Sat 7/1115:00

LHR

-

SLU

3 stops27h 30m

Multiple Airlines

Sun 15/1105:00

SLU

-

LHR

2 stops35h 00m

Multiple Airlines

Deal found 8/6£1,133

Wed 19/812:50

LHR

-

UVF

2 stops30h 24m

Delta

Wed 26/815:34

UVF

-

LHR

2 stops34h 11m

Delta

Deal found 7/6£940

Tue 8/911:20

LHR

-

SLU

2 stops27h 10m

Multiple Airlines

Thu 17/917:50

SLU

-

LHR

2 stops21h 20m

Multiple Airlines

Deal found 9/6£1,204

Sat 15/817:40

LHR

-

SLU

2 stops30h 20m

Multiple Airlines

Sat 22/812:35

SLU

-

LHR

2 stops18h 15m

Multiple Airlines

Deal found 8/6£1,208

Mon 7/909:35

LHR

-

SLU

2 stops27h 35m

Multiple Airlines

Wed 7/1010:15

SLU

-

LHR

3 stops18h 05m

Multiple Airlines

Deal found 9/6£1,254

Fri 2/1009:35

LHR

-

SLU

1 stop14h 25m

Multiple Airlines

Fri 9/1015:45

SLU

-

LHR

1 stop12h 35m

Multiple Airlines

Deal found 8/6£1,293

Tue 21/708:30

LHR

-

SLU

3 stops33h 00m

Multiple Airlines

Tue 28/709:10

SLU

-

LHR

2 stops21h 40m

Multiple Airlines

Deal found 6/6£1,401

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£657
One-way from	£419

3/9-17/9

3/9-17/9
2 total stops
25h 30m total
London to Saint Lucia

24/7

24/7
3 total stops
45h 30m total
London to Saint Lucia

Cheapflights Fare Finder

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 21/9

16:20-14:08

2 stops26h 48m

Castries Hewanorra

Sat 3/10

15:33-13:15

1 stop16h 42m

£735

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

£738

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

£769

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sat 26/9

11:45-14:08

2 stops31h 23m

Castries Hewanorra

Sat 3/10

15:33-13:15

1 stop16h 42m

£890

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

£894

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 9/11

10:10-15:10

2 stops33h 00m

Castries Hewanorra

Thu 19/11

16:25-11:40

1 stop15h 15m

£896

Fastest return journey

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 3/7

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Fri 10/7

12:35-06:15

1 stop12h 40m

£911

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 10/9

11:15-14:08

1 stop31h 53m

Castries Hewanorra

Sat 10/10

15:41-13:15

1 stop16h 34m

£928

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

£940

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 1/8

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Mon 10/8

12:35-06:15

1 stop12h 40m

£952

Flights are sorted by cheapest return flights first.

Deals found on 9/6

Showing 1-10 of 33 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.

LHR-UVF

LHR-SLU

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

LHR-LC0

LHR-UVF

LHR-SLU

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 £495). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £756). 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

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.

7.8

Good

Reviews

1 / 20

6.0

Good

Anonymous,Apr 2026

OKC - ATL

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

7.8

Good

7.8

Good

Reviews

1 / 20

6.0

Good

Anonymous,Apr 2026

OKC - ATL

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

7.7

Good

7.8

Good

Reviews

1 / 20

6.0

Good

Anonymous,Apr 2026

OKC - ATL

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

7.1

Good

7.8

Good

Reviews

1 / 20

6.0

Good

Anonymous,Apr 2026

OKC - ATL

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

7.1

Good

7.8

Good

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

7.8

Good

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

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 48m. 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 £495). Flying from London Heathrow Airport to Saint Lucia in July is currently the most expensive (average of £756). 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

Alternative routes

Complete your trip

Direct flights to

Flights by cabin class

Other flight options

Popular flights

Alternative routes for Heathrow to Saint Lucia

Heathrow to Montego Bay flights

Heathrow to Bridgetown flights

Gatwick to Bridgetown flights

Heathrow to Kingston flights

Stansted to Bridgetown flights

London City to Bridgetown flights

London City to Montego Bay flights

Heathrow to Punta Cana flights

Gatwick to Punta Cana flights

London City to Kingston flights

Gatwick to Kingston flights

Stansted to Kingston flights

Stansted to Punta Cana flights

Luton to Montego Bay flights

Heathrow to Nassau flights

Heathrow to Castries flights

Heathrow to Port of Spain flights

Stansted to Montego Bay flights

Gatwick to Montego Bay flights

Gatwick to St. John's flights

Luton to Punta Cana flights

Heathrow to St. John's flights

Heathrow to Kingstown flights

London City to Punta Cana flights

Heathrow to St. George's flights

Gatwick to Castries flights

Heathrow to Luis Munoz Marin Intl flights

Heathrow to Santo Domingo flights

Gatwick to Basseterre flights

Stansted to Port of Spain flights

Gatwick to Santo Domingo flights

Gatwick to Scarborough flights

Heathrow to Roseau flights

Heathrow to Scarborough flights

Heathrow to Basseterre flights

Gatwick to Port of Spain flights

Gatwick to Havana flights

Heathrow to Willemstad flights

Heathrow to Castries flights

Gatwick to St. George's flights

London City to Castries flights

Gatwick to Luis Munoz Marin Intl flights

Stansted to Santo Domingo flights

Heathrow to Oranjestad flights

Gatwick to Willemstad flights

Gatwick to Kingstown flights

London City to Santo Domingo flights

Heathrow to George Town flights

Heathrow to Simpson Bay flights

Top 6 airlines flying from Heathrow to Saint Lucia

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£503	Average£830	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
JetBlue	Cheapest£536	Average£839	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Air Canada	Cheapest£638	Average£781	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Finnair	Cheapest£695	Average£913	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£711	Average£965	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
KLM	Cheapest£1,164	Average£1,547	FlexibilityNo cancel fee	On-time75%	Search KLM flights

Fly with Cheapflights

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.