£377+ 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 October 2026.

Wed 2/1210:50 -

1 stop32h 14m

Wed 9/1216:26 -

1 stop33h 59m

Deal found 27/9£549

Thu 5/1108:00 -

1 stop15h 00m

Thu 26/1115:45 -

1 stop12h 10m

Deal found 27/9£587

Wed 11/1108:00 -

1 stop15h 00m

Wed 18/1115:45 -

1 stop15h 10m

Deal found 27/9£588

Fri 6/1108:00 -

1 stop32h 05m

Thu 12/1115:45 -

1 stop12h 10m

Deal found 27/9£599

Mon 9/1110:50 -

1 stop32h 15m

Mon 23/1116:25 -

1 stop34h 00m

Deal found 29/9£613

Sat 21/1112:20 -

1 stop31h 47m

Thu 26/1117:22 -

1 stop23h 33m

Deal found 29/9£621

Sat 5/1213:25 -

1 stop26h 40m

Sun 13/1215:45 -

1 stop12h 45m

Deal found 28/9£623

Tue 10/1112:20 -

1 stop31h 52m

Tue 17/1117:17 -

1 stop24h 23m

Deal found 26/9£627

Sun 8/1111:10 -

1 stop33h 30m

Mon 23/1117:35 -

1 stop34h 55m

Deal found 30/9£648

Sun 8/1114:45 -

1 stop32h 10m

Mon 23/1116:50 -

1 stop11h 05m

Deal found 29/9£648

Wed 18/1114:45 -

1 stop32h 15m

Wed 25/1115:45 -

1 stop12h 10m

Deal found 27/9£651

Wed 2/1209:00 -

2 stops35h 40m

Wed 9/1217:35 -

1 stop34h 55m

Deal found 27/9£654

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 October 2026.

Fri 8/110:35 -

1 stop12h 25m

Sun 17/112:35 -

1 stop13h 15m

Deal found 27/9£642

Sun 8/1111:15 -

1 stop30h 15m

Mon 23/1115:56 -

1 stop16h 09m

Deal found 26/9£682

Sun 8/1116:35 -

2 stops26h 30m

Mon 23/1116:25 -

1 stop15h 15m

Deal found 30/9£948

Fri 26/206:50 -

2 stops34h 17m

Sat 6/317:17 -

1 stop35h 53m

Deal found 26/9£972

Sat 21/1111:15 -

2 stops31h 50m

Sat 13/216:25 -

2 stops22h 50m

Deal found 28/9£1,251

Wed 17/210:35 -

1 stop12h 25m

Wed 3/315:45 -

1 stop12h 45m

Deal found 29/9£643

Thu 29/1013:25 -

1 stop29h 50m

Wed 11/1115:45 -

1 stop12h 45m

Deal found 30/9£746

Thu 21/113:25 -

1 stop26h 40m

Thu 18/212:35 -

1 stop13h 15m

Deal found 27/9£750

Tue 10/1120:10 -

2 stops22h 55m

Tue 17/1116:25 -

1 stop15h 15m

Deal found 26/9£949

Fri 23/1008:00 -

2 stops34h 31m

Sat 31/1016:17 -

2 stops58h 23m

Deal found 27/9£1,027

Sat 13/214:45 -

1 stop28h 30m

Tue 23/215:45 -

1 stop15h 10m

Deal found 1/10£903

Fri 20/1111:45 -

2 stops31h 20m

Fri 12/216:25 -

2 stops24h 25m

Deal found 28/9£1,268

Thu 3/1209:40 -

2 stops33h 24m

Wed 16/1216:26 -

2 stops34h 24m

Deal found 29/9£1,156

Tue 1/1210:35 -

1 stop12h 25m

Fri 15/112:35 -

1 stop13h 15m

Deal found 27/9£930

Fri 4/1220:10 -

2 stops22h 54m

Tue 15/1216:26 -

2 stops37h 24m

Deal found 29/9£1,195

Mon 26/1013:20 -

1 stop29h 55m

Mon 2/1115:45 -

1 stop12h 45m

Deal found 28/9£941

Wed 16/1213:25 -

1 stop26h 40m

Tue 5/115:45 -

1 stop12h 45m

Deal found 30/9£1,019

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£549
One-way from	£377

KLM

KLM
2/12-9/12
2 total stops
66h 13m total
London to Saint Lucia

JetBlue

JetBlue
12/11-31/12
1 total stop
31h 52m 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 - UVF Castries Hewanorra

LHRUVF

London Heathrow

Wed 13/1

12:15-14:55

2 stops30h 40m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£474

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Mon 15/2

14:50-14:55

2 stops28h 05m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£492

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Mon 25/1

15:00-14:55

1 stop27h 55m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£506

LondonCastries

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

LHRSLU

London Heathrow

Wed 9/12

15:15-17:15

2 stops30h 00m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£523

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sun 31/1

14:50-14:55

2 stops52h 05m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£561

Fastest return journey

LondonCastries

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

LHRSLU

London Heathrow

Wed 13/1

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£566

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Mon 30/11

14:50-14:55

2 stops28h 05m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£567

LondonCastries

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

LHRSLU

London Heathrow

Sun 31/1

13:25-12:05

1 stop26h 40m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£568

LondonCastries

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

LHRSLU

London Heathrow

Mon 18/1

08:00-18:55

1 stop14h 55m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£570

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Thu 5/11

06:00-16:40

2 stops38h 40m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£582

Flights are sorted by cheapest return flights first.

Deals found on 30/9

Showing 1-10 of 39 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 £589). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,228). 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 Air Canada,American Airlines, 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.

7.1

Good

Reviews

1 / 20

8.0

Excellent

Anonymous,Oct 2024

NRT - YYZ

Did not like delay since I also had a delay from Toronto to Narita. I understand about safety aspect, but on both legs of trip had me pondering about reliability of Air Canada equipment. I was not aware that aircraft was boarding - no announcement. I had placed my cell phone in air plane mode early.

7.1

Good

7.1

Good

Reviews

1 / 20

8.0

Excellent

Anonymous,Oct 2024

NRT - YYZ

Did not like delay since I also had a delay from Toronto to Narita. I understand about safety aspect, but on both legs of trip had me pondering about reliability of Air Canada equipment. I was not aware that aircraft was boarding - no announcement. I had placed my cell phone in air plane mode early.

American Airlines

7.0

Good

7.1

Good

Reviews

1 / 20

8.0

Excellent

Anonymous,Oct 2024

NRT - YYZ

Did not like delay since I also had a delay from Toronto to Narita. I understand about safety aspect, but on both legs of trip had me pondering about reliability of Air Canada equipment. I was not aware that aircraft was boarding - no announcement. I had placed my cell phone in air plane mode early.

British Airways

6.7

Okay

7.1

Good

Reviews

1 / 20

8.0

Excellent

Anonymous,Oct 2024

NRT - YYZ

Did not like delay since I also had a delay from Toronto to Narita. I understand about safety aspect, but on both legs of trip had me pondering about reliability of Air Canada equipment. I was not aware that aircraft was boarding - no announcement. I had placed my cell phone in air plane mode early.

Related info for your journey

How long is the flight from London Heathrow Airport to Saint Lucia?
American Airlines, Delta, and United Airlines can get you from London Heathrow Airport to Saint Lucia in just under 26h 30m. Your travel time can differ by up to 7h 47m. 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £589). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,228). 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

Stansted to Bridgetown flights

London City to Bridgetown flights

Heathrow to Castries flights

London City to Montego Bay flights

Gatwick to Punta Cana flights

Heathrow to Nassau flights

London City to Kingston flights

Gatwick to Castries flights

Gatwick to Kingston flights

Heathrow to Punta Cana flights

London City to Castries flights

Heathrow to Port of Spain flights

Heathrow to Castries flights

Stansted to Montego Bay flights

Heathrow to Roseau flights

London City to Punta Cana flights

Gatwick to St. John's flights

Stansted to Kingston flights

Gatwick to Castries flights

Gatwick to Port of Spain flights

Stansted to Punta Cana flights

Heathrow to Luis Munoz Marin Intl flights

Gatwick to Basseterre flights

Heathrow to St. George's flights

Luton to Punta Cana flights

Gatwick to Montego Bay flights

Gatwick to Luis Munoz Marin Intl flights

Heathrow to St. John's flights

Luton to Montego Bay flights

Heathrow to Basseterre flights

Stansted to Port of Spain flights

Heathrow to Kingstown flights

Gatwick to Nassau flights

Heathrow to Santo Domingo flights

Stansted to Luis Munoz Marin Intl flights

Gatwick to Roseau flights

London City to Luis Munoz Marin Intl flights

Gatwick to St. George's flights

Heathrow to George Town flights

Heathrow to Willemstad flights

Heathrow to Road Town flights

Gatwick to Santo Domingo flights

Gatwick to Havana flights

Gatwick to Willemstad flights

Stansted to Nassau flights

Gatwick to Kingstown flights

Top 3 airlines flying from Heathrow to Saint Lucia

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£512	Average£805	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Air Canada	Cheapest£668	Average£751	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
American Airlines	Cheapest£682	Average£878	FlexibilityNo cancel fee	On-time71%	Search American Airlines 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.