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 22h 55m. Your travel time can differ by up to 52m. 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 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.

£436+ 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 16 October 2026.

Tue 1/1209:00 -

2 stops35h 40m

Fri 11/1217:35 -

2 stops47h 25m

Deal found 13/10£670

Sun 8/1115:00 -

1 stop29h 40m

Mon 23/1117:35 -

2 stops33h 35m

Deal found 11/10£683

Fri 27/1118:40 -

2 stops50h 00m

Fri 4/1217:35 -

2 stops57h 35m

Deal found 13/10£684

Sat 28/1118:00 -

1 stop26h 40m

Fri 4/1217:35 -

1 stop34h 55m

Deal found 13/10£685

Thu 26/1111:10 -

1 stop33h 30m

Thu 3/1217:35 -

1 stop32h 55m

Deal found 11/10£686

Thu 15/1014:10 -

1 stop29h 05m

Mon 2/1117:35 -

2 stops23h 25m

Deal found 11/10£687

Wed 25/1115:00 -

1 stop29h 40m

Fri 4/1217:35 -

1 stop34h 55m

Deal found 13/10£693

Sun 8/1113:00 -

2 stops31h 40m

Sun 22/1117:35 -

2 stops32h 55m

Deal found 11/10£694

Wed 25/1113:00 -

2 stops55h 40m

Wed 2/1217:35 -

1 stop34h 55m

Deal found 11/10£695

Mon 7/1210:35 -

1 stop12h 25m

Mon 14/1215:45 -

1 stop12h 45m

Deal found 11/10£757

Mon 9/1108:00 -

1 stop15h 00m

Mon 23/1116:50 -

1 stop14h 05m

Deal found 12/10£791

Sun 8/1108:00 -

1 stop15h 00m

Mon 23/1115:45 -

1 stop15h 10m

Deal found 12/10£792

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 16 October 2026.

Wed 20/110:35 -

1 stop12h 25m

Sat 30/112:35 -

1 stop13h 15m

Deal found 14/10£782

Sat 14/1119:20 -

2 stops23h 47m

Sat 21/1115:56 -

1 stop16h 09m

Deal found 13/10£840

Sun 8/1120:10 -

2 stops22h 55m

Mon 23/1116:25 -

1 stop34h 00m

Deal found 11/10£949

Fri 4/1211:45 -

2 stops31h 19m

Fri 11/1216:26 -

1 stop33h 59m

Deal found 14/10£1,223

Fri 4/1210:25 -

1 stop34h 00m

Sat 12/1217:17 -

1 stop24h 03m

Deal found 14/10£1,260

Fri 19/210:35 -

1 stop12h 25m

Thu 4/315:45 -

1 stop12h 45m

Deal found 14/10£786

Wed 17/210:35 -

1 stop12h 25m

Wed 3/315:45 -

1 stop12h 45m

Deal found 15/10£789

Tue 2/210:10 -

2 stops56h 55m

Tue 16/216:25 -

2 stops33h 55m

Deal found 15/10£959

Sat 6/213:25 -

1 stop29h 50m

Sun 14/212:35 -

1 stop13h 15m

Deal found 13/10£801

Mon 1/220:10 -

2 stops22h 55m

Thu 11/216:25 -

2 stops33h 55m

Deal found 15/10£959

Wed 4/1108:00 -

1 stop32h 05m

Mon 23/1115:45 -

1 stop15h 10m

Deal found 11/10£803

Mon 30/1110:35 -

1 stop12h 25m

Sun 13/1215:45 -

1 stop12h 45m

Deal found 13/10£834

Sat 13/214:05 -

2 stops29h 00m

Sat 20/216:25 -

2 stops20h 35m

Deal found 15/10£1,300

Sat 20/213:25 -

1 stop26h 40m

Fri 12/315:45 -

1 stop12h 45m

Deal found 13/10£892

Sat 9/113:25 -

1 stop26h 40m

Fri 29/115:45 -

1 stop12h 45m

Deal found 15/10£916

Mon 26/1016:30 -

2 stops50h 42m

Thu 26/1117:22 -

2 stops41h 23m

Deal found 15/10£1,003

Thu 7/116:30 -

2 stops47h 01m

Wed 13/116:55 -

2 stops48h 10m

Deal found 14/10£1,039

Sat 5/1216:30 -

2 stops51h 01m

Tue 15/1216:55 -

2 stops43h 25m

Deal found 14/10£1,091

Fri 11/1206:25 -

2 stops35h 31m

Mon 14/1216:55 -

2 stops49h 35m

Deal found 14/10£1,139

Fri 26/312:15 -

2 stops29h 40m

Tue 30/315:49 -

1 stop23h 56m

Deal found 16/10£1,246

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£670
One-way from	£436

SWISS
1/12-11/12
4 total stops
83h 05m total
London to Saint Lucia

Search Deals

JetBlue
15/1-31/12
1 total stop
27h 11m 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 London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Fri 11/12

09:20-13:56

1 stop32h 36m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£482

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Wed 11/11

07:25-16:12

1 stop36h 47m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£482

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Mon 8/3

08:05-15:18

1 stop35h 13m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£486

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Mon 12/4

08:15-14:18

1 stop35h 03m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£493

LondonCastries

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

LHRSLU

London Heathrow

Wed 20/1

15:15-17:15

2 stops30h 00m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£504

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Mon 11/1

12:10-15:34

2 stops31h 24m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£508

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Wed 20/1

18:00-14:55

1 stop24h 55m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£531

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Mon 8/3

14:50-14:55

2 stops28h 05m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£536

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Fri 15/1

08:50-11:31

2 stops30h 41m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£542

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sat 12/12

07:50-15:31

2 stops35h 41m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£558

Flights are sorted by cheapest return flights first.

Deals found on 12/10

Showing 1-10 of 40 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 £589). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,229). 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 and British 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

7.0

Good

12,168 reviews

Check prices

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

7.0

Good

12,168 reviews

American Airlines

7.0

Good

12,168 reviews

Check prices

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

8,262 reviews

American Airlines

7.0

Good

12,168 reviews

Check prices

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 and Delta can get you from London Heathrow Airport to Saint Lucia in just under 22h 55m. Your travel time can differ by up to 52m. 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 £1,229). 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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London City to Santo Domingo flights

Gatwick to Kingstown flights

Top 2 airlines flying from Heathrow to Saint Lucia

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£512	Average£776	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£578	Average£872	FlexibilityNo cancel fee	On-time71%	Search American Airlines 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 £436

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/1. 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 16 October 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 16 October 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 16 October 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 16 October 2026.

Last-minute flights from Heathrow to Saint LuciaDiscover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 16 October 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 16 October 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 16 October 2026.

Search for one-way flight options from Heathrow to Saint Lucia. Find affordable one-way fares based on user searches. Data last updated 16 October 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 16 October 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Top 2 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 16 October 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 16 October 2026.

Last-minute flights from Heathrow to Saint Lucia
Discover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 16 October 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 16 October 2026.