£428+ 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 1 September 2026.

Mon 28/908:15 -

1 stop36h 18m

Mon 5/1016:39 -

1 stop23h 06m

Deal found 31/8£625

Sun 27/908:15 -

1 stop36h 18m

Sun 4/1016:39 -

1 stop35h 51m

Deal found 30/8£659

Fri 2/1011:55 -

1 stop32h 09m

Sun 11/1016:39 -

1 stop35h 51m

Deal found 29/8£661

Sat 3/1008:15 -

1 stop36h 19m

Fri 9/1016:39 -

1 stop23h 06m

Deal found 28/8£661

Fri 27/1109:20 -

1 stop31h 29m

Sat 5/1215:35 -

1 stop35h 20m

Deal found 30/8£666

Mon 7/1220:05 -

2 stops48h 35m

Mon 14/1217:40 -

1 stop34h 50m

Deal found 29/8£673

Mon 26/1017:00 -

2 stops24h 42m

Mon 2/1116:07 -

1 stop15h 53m

Deal found 31/8£679

Fri 4/1213:45 -

2 stops54h 55m

Mon 14/1217:40 -

1 stop34h 50m

Deal found 31/8£682

Mon 14/1214:30 -

1 stop29h 11m

Sat 16/113:29 -

1 stop13h 36m

Deal found 27/8£684

Sun 11/1015:35 -

1 stop28h 29m

Sun 18/1014:42 -

1 stop16h 53m

Deal found 27/8£684

Mon 12/1015:40 -

1 stop28h 24m

Mon 26/1016:04 -

1 stop16h 01m

Deal found 29/8£685

Sat 19/911:10 -

1 stop12h 50m

Sun 4/1012:35 -

1 stop12h 40m

Deal found 30/8£692

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 1 September 2026.

Tue 2/210:35 -

1 stop12h 25m

Wed 10/212:35 -

1 stop13h 15m

Deal found 27/8£619

Sat 16/109:55 -

1 stop33h 08m

Sat 23/117:02 -

2 stops25h 08m

Deal found 26/8£692

Sat 16/115:00 -

1 stop29h 40m

Fri 22/117:40 -

1 stop34h 50m

Deal found 26/8£749

Fri 23/1018:00 -

1 stop24h 31m

Sat 31/1016:17 -

2 stops35h 38m

Deal found 29/8£986

Wed 30/912:50 -

2 stops30h 22m

Wed 7/1015:32 -

1 stop16h 43m

Deal found 30/8£997

Wed 17/210:35 -

1 stop12h 25m

Wed 3/315:45 -

1 stop12h 45m

Deal found 31/8£636

Fri 15/117:00 -

1 stop23h 29m

Sat 23/113:29 -

1 stop13h 36m

Deal found 26/8£692

Sat 19/911:10 -

1 stop12h 50m

Sun 4/1012:35 -

1 stop12h 40m

Deal found 30/8£692

Sat 10/1015:40 -

1 stop27h 11m

Sat 17/1016:04 -

2 stops19h 16m

Deal found 26/8£707

Fri 1/110:35 -

1 stop12h 25m

Thu 14/115:45 -

1 stop12h 45m

Deal found 29/8£698

Thu 1/1009:35 -

1 stop14h 25m

Mon 5/1015:45 -

1 stop12h 35m

Deal found 29/8£701

Fri 26/206:50 -

2 stops34h 17m

Sat 13/317:17 -

2 stops37h 28m

Deal found 29/8£1,005

Mon 11/114:45 -

1 stop24h 15m

Thu 21/115:45 -

1 stop12h 10m

Deal found 30/8£708

Sun 10/110:35 -

1 stop12h 25m

Sun 31/112:35 -

1 stop13h 15m

Deal found 27/8£767

Thu 21/113:25 -

1 stop26h 40m

Thu 18/212:35 -

1 stop13h 15m

Deal found 30/8£802

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£619
One-way from	£428

2/2-10/2

2/2-10/2
2 total stops
25h 40m total
London to Saint Lucia

American Airlines

American Airlines
6/9
2 total stops
24h 44m 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 London Heathrow - SLU Castries George F. L. Charle

LHRSLU

London Heathrow

Tue 2/2

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Wed 10/2

12:35-05:50

1 stop13h 15m

£619

Fastest return journey

LondonCastries

LHR London Heathrow - SLU Castries George F. L. Charle

LHRSLU

London Heathrow

Wed 17/2

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Wed 3/3

15:45-08:30

1 stop12h 45m

£636

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sat 16/1

09:55-15:03

1 stop33h 08m

Castries Hewanorra

Sat 23/1

17:02-22:10

2 stops25h 08m

£692

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Fri 15/1

17:00-12:29

1 stop23h 29m

Castries Hewanorra

Sat 23/1

13:29-07:05

1 stop13h 36m

£692

LondonCastries

LHR London Heathrow - SLU Castries George F. L. Charle

LHRSLU

London Heathrow

Sat 19/9

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Sun 4/10

12:35-06:15

1 stop12h 40m

£692

LondonCastries

LHR London Heathrow - SLU Castries George F. L. Charle

LHRSLU

London Heathrow

Fri 1/1

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Thu 14/1

15:45-08:30

1 stop12h 45m

£698

LondonCastries

LHR London Heathrow - SLU Castries George F. L. Charle

LHRSLU

London Heathrow

Thu 1/10

09:35-19:00

1 stop14h 25m

Castries George F. L. Charle

Mon 5/10

15:45-09:20

1 stop12h 35m

£701

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sat 10/10

15:40-13:51

1 stop27h 11m

Castries Hewanorra

Sat 17/10

16:04-16:20

2 stops19h 16m

£707

LondonCastries

LHR London Heathrow - SLU Castries George F. L. Charle

LHRSLU

London Heathrow

Mon 11/1

14:45-11:00

1 stop24h 15m

Castries George F. L. Charle

Thu 21/1

15:45-07:55

1 stop12h 10m

£708

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sat 16/1

15:00-16:40

1 stop29h 40m

Castries Hewanorra

Fri 22/1

17:40-08:30

1 stop34h 50m

£749

Flights are sorted by cheapest return flights first.

Deals found on 27/8

Showing 1-10 of 31 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, 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 £1,203). 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 American Airlines,Air Canada, andBritish Airways 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.

American Airlines

7.1

Good

Reviews

1 / 20

10.0

Excellent

Ron,Aug 2026

LHR - LAX

Unfortunately it took an hour and 15 minutes for luggage to get to customs so I had to pay for hotel and other ticket to get home Missed flight

American Airlines

7.1

Good

American Airlines

7.1

Good

Reviews

1 / 20

10.0

Excellent

Ron,Aug 2026

LHR - LAX

Unfortunately it took an hour and 15 minutes for luggage to get to customs so I had to pay for hotel and other ticket to get home Missed flight

7.1

Good

American Airlines

7.1

Good

Reviews

1 / 20

10.0

Excellent

Ron,Aug 2026

LHR - LAX

Unfortunately it took an hour and 15 minutes for luggage to get to customs so I had to pay for hotel and other ticket to get home Missed flight

British Airways

6.7

Okay

American Airlines

7.1

Good

Reviews

1 / 20

10.0

Excellent

Ron,Aug 2026

LHR - LAX

Unfortunately it took an hour and 15 minutes for luggage to get to customs so I had to pay for hotel and other ticket to get home Missed flight

Related info for your journey

How long is the flight from London Heathrow Airport to Saint Lucia?
American Airlines, Air Canada, and United Airlines can get you from London Heathrow Airport to Saint Lucia in just under 24h 31m. Your travel time can differ by up to 8h 37m. 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 £1,203). 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 Bridgetown flights

Heathrow to Montego Bay flights

Gatwick to Bridgetown flights

Heathrow to Kingston flights

Heathrow to Punta Cana flights

Gatwick to Punta Cana flights

London City to Bridgetown flights

London City to Montego Bay flights

Heathrow to Nassau flights

Stansted to Bridgetown flights

Heathrow to Port of Spain flights

Gatwick to Kingston flights

London City to Kingston flights

Stansted to Montego Bay flights

Gatwick to Port of Spain flights

Stansted to Punta Cana flights

Luton to Punta Cana flights

London City to Punta Cana flights

Gatwick to Montego Bay flights

Stansted to Kingston flights

Heathrow to St. George's flights

Heathrow to Castries flights

Heathrow to St. John's flights

Luton to Montego Bay flights

Gatwick to St. John's flights

Heathrow to Luis Munoz Marin Intl flights

Heathrow to Roseau flights

Heathrow to Santo Domingo flights

Stansted to Port of Spain flights

London City to Luis Munoz Marin Intl flights

Gatwick to Luis Munoz Marin Intl flights

Heathrow to George Town flights

Gatwick to Nassau flights

Heathrow to Willemstad flights

Heathrow to Kingstown flights

Gatwick to Castries flights

Gatwick to Roseau flights

Gatwick to Santo Domingo flights

Gatwick to Willemstad flights

Stansted to Luis Munoz Marin Intl flights

Gatwick to Havana flights

Gatwick to Basseterre flights

Gatwick to St. George's flights

Heathrow to Providenciales flights

Heathrow to Castries flights

Heathrow to Oranjestad flights

Stansted to Santo Domingo flights

Stansted to Nassau flights

Top 3 airlines flying from Heathrow to Saint Lucia

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£497	Average£788	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£566	Average£860	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	Cheapest£654	Average£738	FlexibilityNo cancel fee	On-time67%	Search Air Canada 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.