£397+ Cheap Flights from London Heathrow Airport to Saint Lucia | Cheapflights

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Cheap flight deals from Heathrow to Saint Lucia

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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 6 September 2026.

Thu 24/910:45 -

1 stop30h 20m

Wed 7/1012:35 -

1 stop12h 40m

Deal found 2/9£628

Fri 9/1008:15 -

1 stop35h 49m

Mon 19/1016:39 -

1 stop23h 06m

Deal found 3/9£630

Fri 9/1008:15 -

1 stop35h 49m

Sun 18/1016:39 -

1 stop35h 51m

Deal found 5/9£630

Mon 9/1114:45 -

1 stop32h 15m

Wed 18/1115:45 -

1 stop12h 10m

Deal found 4/9£635

Fri 6/1112:05 -

2 stops56h 35m

Sun 15/1117:40 -

1 stop34h 50m

Deal found 2/9£645

Tue 3/1107:25 -

1 stop36h 47m

Wed 11/1117:17 -

1 stop36h 13m

Deal found 4/9£655

Mon 9/1112:20 -

1 stop31h 52m

Mon 16/1117:32 -

1 stop24h 08m

Deal found 1/9£657

Thu 17/911:15 -

1 stop31h 57m

Wed 28/1015:32 -

1 stop34h 53m

Deal found 1/9£658

Sat 10/1017:50 -

1 stop24h 50m

Sun 18/1014:30 -

2 stops25h 55m

Deal found 3/9£659

Thu 1/1008:15 -

1 stop36h 19m

Thu 15/1016:39 -

1 stop23h 06m

Deal found 4/9£660

Fri 2/1008:15 -

1 stop35h 49m

Mon 5/1016:39 -

1 stop23h 06m

Deal found 2/9£661

Thu 24/911:55 -

1 stop32h 39m

Mon 28/916:39 -

1 stop23h 06m

Deal found 2/9£661

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 6 September 2026.

Thu 24/910:45 -

1 stop30h 20m

Wed 7/1012:35 -

1 stop12h 40m

Deal found 2/9£628

Wed 18/1115:00 -

1 stop29h 40m

Fri 27/1117:40 -

1 stop34h 50m

Deal found 5/9£713

Fri 16/1016:05 -

2 stops27h 07m

Thu 22/1015:32 -

2 stops23h 38m

Deal found 4/9£848

Fri 23/1018:00 -

1 stop24h 31m

Sat 31/1016:17 -

2 stops35h 38m

Deal found 4/9£982

Wed 17/210:35 -

1 stop12h 25m

Wed 3/315:45 -

1 stop12h 45m

Deal found 2/9£638

Tue 5/110:35 -

1 stop12h 25m

Tue 19/112:35 -

1 stop13h 15m

Deal found 1/9£736

Thu 3/1216:00 -

1 stop27h 06m

Fri 8/116:25 -

2 stops23h 45m

Deal found 2/9£884

Thu 21/108:00 -

1 stop15h 00m

Thu 18/215:45 -

1 stop15h 10m

Deal found 6/9£801

Wed 30/1211:35 -

2 stops31h 40m

Fri 8/116:25 -

2 stops23h 45m

Deal found 4/9£898

Fri 29/110:35 -

1 stop12h 25m

Fri 5/215:45 -

1 stop12h 45m

Deal found 4/9£818

Thu 24/1213:25 -

1 stop26h 40m

Thu 31/1215:45 -

1 stop12h 45m

Deal found 5/9£854

Wed 18/1114:30 -

3 stops28h 25m

Fri 27/1117:40 -

2 stops35h 40m

Deal found 5/9£924

Thu 1/1010:45 -

1 stop13h 15m

Thu 15/1012:35 -

1 stop12h 15m

Deal found 4/9£927

Sun 18/1011:10 -

1 stop29h 55m

Sun 25/1015:45 -

1 stop12h 45m

Deal found 3/9£1,078

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£582
One-way from	£397

JetBlue

JetBlue
11/1-8/2
2 total stops
71h 45m total
London to Saint Lucia

WestJet

WestJet
30/11-31/12
2 total stops
28h 05m 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

Mon 30/11

14:50-14:55

2 stops28h 05m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£397

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Mon 23/11

14:50-14:55

3 stops28h 05m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£407

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Mon 30/11

18:00-14:55

1 stop24h 55m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£425

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Thu 1/10

14:10-14:15

1 stop29h 05m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£519

LondonCastries

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

LHRSLU

London Heathrow

Sun 15/11

14:45-18:55

1 stop32h 10m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£550

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Tue 15/12

15:00-16:40

1 stop29h 40m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£553

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Tue 15/12

12:15-16:40

3 stops32h 25m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£561

LondonCastries

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

LHRSLU

London Heathrow

Wed 3/2

15:15-17:15

2 stops30h 00m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£618

LondonCastries

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

LHRSLU

London Heathrow

Sat 26/9

08:30-12:05

2 stops56h 35m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£624

LondonCastries

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

LHRSLU

London Heathrow

Thu 24/9

10:45-12:05

1 stop30h 20m

Castries George F. L. Charle

Wed 7/10

12:35-06:15

1 stop12h 40m

£628

Flights are sorted by cheapest return flights first.

Deals found on 1/9

Showing 1-10 of 28 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.

LHR-SLU

LHR-UVF

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-SLU

LHR-UVF

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 £498). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,205). 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?
Air Canada and Delta can get you from London Heathrow Airport to Saint Lucia in just under 27h 07m. Your travel time can differ by up to 2h 33m. 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 £498). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,205). 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

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Alternative routes for Heathrow to Saint Lucia

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Stansted to Santo Domingo flights

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Heathrow to Simpson Bay flights

Top 3 airlines flying from Heathrow to Saint Lucia

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£498	Average£790	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£567	Average£861	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	Cheapest£655	Average£740	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

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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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