How long is the flight from London Heathrow Airport to Saint Lucia?

American Airlines and Delta can get you from London Heathrow Airport to Saint Lucia in just under 24h 58m. Your travel time can differ by up to 6h 54m. 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.

What are the most popular airlines that fly from London Heathrow Airport to Saint Lucia?

Before booking your flight from London Heathrow Airport to Saint Lucia check out the most popular airlines for this route: British Airways, American Airlines or Air Canada.

What is the cheapest time of day to fly from LHR to LC?

When flying from London Heathrow Airport to Saint Lucia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

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

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 5 August 2026.

Tue 22/908:15 -

1 stop36h 18m

Tue 29/916:39 -

1 stop23h 06m

Deal found 4/8£609

Tue 15/920:10 -

2 stops22h 52m

Tue 22/915:02 -

2 stops22h 53m

Deal found 1/8£678

Fri 13/1114:30 -

1 stop27h 02m

Tue 24/1115:56 -

1 stop16h 09m

Deal found 31/7£681

Tue 15/912:15 -

1 stop30h 47m

Tue 22/915:02 -

2 stops22h 53m

Deal found 31/7£682

Mon 9/1111:15 -

1 stop30h 17m

Mon 16/1116:07 -

1 stop35h 13m

Deal found 2/8£683

Tue 15/908:15 -

1 stop36h 18m

Tue 22/916:39 -

1 stop23h 06m

Deal found 1/8£684

Mon 21/1217:00 -

2 stops25h 06m

Sat 26/1215:06 -

2 stops23h 54m

Deal found 3/8£684

Tue 18/815:35 -

1 stop27h 14m

Fri 28/815:19 -

1 stop15h 51m

Deal found 31/7£685

Sat 8/818:05 -

2 stops25h 24m

Tue 25/814:49 -

2 stops25h 51m

Deal found 31/7£686

Thu 6/815:00 -

1 stop28h 19m

Thu 13/815:19 -

1 stop15h 51m

Deal found 31/7£687

Tue 15/911:10 -

1 stop12h 50m

Tue 22/912:35 -

1 stop12h 40m

Deal found 31/7£695

Mon 14/911:10 -

1 stop12h 50m

Mon 21/912:35 -

1 stop12h 40m

Deal found 31/7£713

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 5 August 2026.

Tue 5/118:05 -

2 stops24h 58m

Wed 20/117:02 -

2 stops21h 58m

Deal found 4/8£699

Sun 30/814:10 -

2 stops28h 39m

Mon 14/915:02 -

2 stops21h 13m

Deal found 31/7£703

Sat 19/911:20 -

2 stops31h 52m

Sat 26/915:32 -

1 stop16h 43m

Deal found 4/8£736

Mon 14/911:10 -

1 stop12h 50m

Mon 21/912:35 -

1 stop12h 40m

Deal found 31/7£713

Thu 24/916:20 -

2 stops26h 52m

Mon 28/915:32 -

1 stop16h 43m

Deal found 4/8£736

Fri 18/916:20 -

2 stops26h 52m

Fri 25/915:32 -

2 stops23h 38m

Deal found 4/8£737

Thu 10/910:45 -

1 stop13h 15m

Thu 11/315:45 -

1 stop12h 45m

Deal found 2/8£737

Mon 31/816:20 -

2 stops26h 54m

Mon 7/915:34 -

2 stops23h 36m

Deal found 1/8£737

Thu 24/910:45 -

1 stop13h 15m

Mon 28/909:10 -

1 stop16h 05m

Deal found 31/7£744

Wed 25/1113:25 -

1 stop26h 40m

Sun 6/1212:35 -

1 stop13h 15m

Deal found 3/8£748

Thu 3/913:25 -

1 stop29h 49m

Thu 10/915:32 -

1 stop16h 43m

Deal found 4/8£771

Mon 28/911:10 -

1 stop12h 50m

Mon 12/1012:35 -

1 stop12h 40m

Deal found 31/7£751

Thu 12/1114:45 -

1 stop25h 20m

Thu 26/1115:45 -

1 stop12h 10m

Deal found 3/8£787

Sat 29/809:40 -

2 stops33h 34m

Sat 19/915:32 -

1 stop16h 43m

Deal found 3/8£896

Thu 3/910:45 -

1 stop13h 15m

Thu 10/912:35 -

1 stop12h 15m

Deal found 3/8£798

Tue 1/915:15 -

1 stop27h 59m

Tue 8/915:32 -

1 stop16h 43m

Deal found 2/8£931

Fri 25/1210:35 -

1 stop12h 25m

Sat 9/115:45 -

1 stop12h 45m

Deal found 4/8£849

Fri 28/811:10 -

1 stop12h 50m

Fri 4/912:35 -

1 stop12h 40m

Deal found 31/7£851

Wed 25/1113:25 -

1 stop29h 50m

Mon 30/1112:35 -

1 stop13h 15m

Deal found 4/8£931

Fri 27/1111:10 -

3 stops35h 50m

Tue 1/1212:35 -

2 stops18h 45m

Deal found 2/8£982

Thu 8/1010:45 -

1 stop13h 15m

Sat 17/1012:35 -

1 stop12h 40m

Deal found 4/8£1,013

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£609
One-way from	£397

JetBlue
22/9-29/9
2 total stops
59h 24m total
London to Saint Lucia

Search Deals

JetBlue
24/9
1 total stop
36h 19m total
London to Saint Lucia

Search Deals

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

Tue 5/1

18:05-15:03

2 stops24h 58m

Castries Hewanorra

Wed 20/1

17:02-19:00

2 stops21h 58m

£699

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 30/8

14:10-13:49

2 stops28h 39m

Castries Hewanorra

Mon 14/9

15:02-17:15

2 stops21h 13m

£703

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 14/9

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Mon 21/9

12:35-06:15

1 stop12h 40m

£713

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sat 19/9

11:20-14:12

2 stops31h 52m

Castries Hewanorra

Sat 26/9

15:32-13:15

1 stop16h 43m

£736

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 24/9

16:20-14:12

2 stops26h 52m

Castries Hewanorra

Mon 28/9

15:32-13:15

1 stop16h 43m

£736

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 18/9

16:20-14:12

2 stops26h 52m

Castries Hewanorra

Fri 25/9

15:32-20:10

2 stops23h 38m

£737

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 10/9

10:45-19:00

1 stop13h 15m

Castries George F. L. Charle

Thu 11/3

15:45-08:30

1 stop12h 45m

£737

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 31/8

16:20-14:14

2 stops26h 54m

Castries Hewanorra

Mon 7/9

15:34-20:10

2 stops23h 36m

£737

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 24/9

10:45-19:00

1 stop13h 15m

Castries George F. L. Charle

Mon 28/9

09:10-06:15

1 stop16h 05m

£744

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 25/11

13:25-12:05

1 stop26h 40m

Castries George F. L. Charle

Sun 6/12

12:35-05:50

1 stop13h 15m

£748

Flights are sorted by cheapest return flights first.

Deals found on 4/8

Showing 1-10 of 35 resultsSorted by cheapest first

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 £581). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,212). 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

11,853 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Cameron,Nov 2025

LHR - LIS

This trip was probably the worst one we have ever had on British Airways!!!

American Airlines

7.1

Good

11,853 reviews

American Airlines

7.1

Good

11,853 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Cameron,Nov 2025

LHR - LIS

This trip was probably the worst one we have ever had on British Airways!!!

Air Canada

7.1

Good

11,429 reviews

American Airlines

7.1

Good

11,853 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Cameron,Nov 2025

LHR - LIS

This trip was probably the worst one we have ever had on British Airways!!!

British Airways

6.7

Okay

8,148 reviews

American Airlines

7.1

Good

11,853 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Cameron,Nov 2025

LHR - LIS

This trip was probably the worst one we have ever had on British Airways!!!

Related info for your journey

How long is the flight from London Heathrow Airport to Saint Lucia?
American Airlines and Delta can get you from London Heathrow Airport to Saint Lucia in just under 24h 58m. Your travel time can differ by up to 6h 54m. 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 £581). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,212). 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

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Alternative routes for Heathrow to Saint Lucia

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Top 3 airlines flying from Heathrow to Saint Lucia

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£500	Average£765	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£570	Average£880	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	Cheapest£635	Average£744	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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Cheap flights from London Heathrow Airport to Saint Lucia from £397

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 24/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Saint Lucia

Cheapest flights from Heathrow to Saint LuciaExplore 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 5 August 2026.

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 5 August 2026.

Best flights from Heathrow to Saint LuciaDiscover 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 5 August 2026.

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 5 August 2026.

Last-minute flights from Heathrow to Saint LuciaDiscover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 5 August 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 5 August 2026 and is based on user searches.

One-way flights from Heathrow to Saint LuciaSearch for one-way flight options from Heathrow to Saint Lucia. Find affordable one-way fares based on user searches. Data last updated 5 August 2026.

Search for one-way flight options from Heathrow to Saint Lucia. Find affordable one-way fares based on user searches. Data last updated 5 August 2026.

Find flight deals from Heathrow to Saint Lucia

Round-trip from

One-way from

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Saint Lucia that are best for you.

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.

Cheapflights Insights

What is the cheapest month to book a flight from London Heathrow Airport to Saint Lucia?

Reviews of airlines servicing Saint Lucia

Related info for your journey

How long is the flight from London Heathrow Airport to Saint Lucia?

Can I find deals for flights from Heathrow to Saint Lucia that include hotel bookings?

How can I find direct flights from Heathrow to Saint Lucia?

Can I find deals for business class flights from Heathrow to Saint Lucia?

What is the cheapest month to book a flight from London Heathrow Airport to Saint Lucia?

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.

Complete your trip

Complete your trip to Saint Lucia by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to

Book a non-stop flight to one of these other cities located in .

Search flights from Heathrow to Saint Lucia by cabin class

Find flights from Heathrow to Saint Lucia, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Heathrow and Saint Lucia flights

Browse other Heathrow and Saint Lucia flight options. Last updated on 5 August 2026.

Popular flight searches

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Top 3 airlines flying from Heathrow to Saint Lucia

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How does Cheapflights help users find flights from Heathrow to Saint Lucia?

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Saint Lucia?

Can Cheapflights 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?

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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 5 August 2026.

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 5 August 2026.

Last-minute flights from Heathrow to Saint Lucia
Discover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 5 August 2026 and is based on user searches.

One-way flights from Heathrow to Saint Lucia
Search for one-way flight options from Heathrow to Saint Lucia. Find affordable one-way fares based on user searches. Data last updated 5 August 2026.