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 4h 07m. 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.

£424+ 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 26 October 2026.

Thu 19/1111:10 -

1 stop33h 30m

Thu 26/1117:35 -

1 stop34h 55m

Deal found 22/10£643

Thu 5/1118:00 -

1 stop26h 40m

Wed 10/217:35 -

1 stop32h 55m

Deal found 25/10£645

Sun 1/1118:00 -

1 stop26h 40m

Sun 8/1117:35 -

1 stop34h 55m

Deal found 23/10£673

Mon 7/1213:00 -

2 stops55h 40m

Mon 14/1217:35 -

1 stop34h 55m

Deal found 21/10£679

Sat 5/1210:35 -

1 stop12h 25m

Fri 18/1215:45 -

1 stop12h 45m

Deal found 22/10£779

Sun 6/1210:35 -

1 stop12h 25m

Wed 16/1212:35 -

1 stop13h 15m

Deal found 22/10£779

Sat 5/1210:35 -

1 stop12h 25m

Tue 15/1212:35 -

1 stop13h 15m

Deal found 22/10£785

Fri 4/1213:25 -

1 stop29h 50m

Mon 14/1212:35 -

1 stop13h 15m

Deal found 23/10£800

Tue 8/1210:35 -

1 stop12h 25m

Tue 15/1215:45 -

1 stop12h 45m

Deal found 24/10£829

Thu 3/1218:00 -

2 stops29h 00m

Wed 16/1212:35 -

2 stops18h 45m

Deal found 23/10£840

Mon 2/1114:45 -

1 stop25h 20m

Sat 7/1115:45 -

1 stop15h 10m

Deal found 23/10£872

Sun 22/1108:00 -

1 stop15h 00m

Sun 29/1115:45 -

1 stop15h 10m

Deal found 24/10£874

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 26 October 2026.

Thu 3/1214:30 -

1 stop27h 02m

Wed 23/1216:15 -

1 stop15h 45m

Deal found 26/10£747

Sat 5/1210:35 -

1 stop12h 25m

Fri 18/1215:45 -

1 stop12h 45m

Deal found 22/10£779

Wed 3/320:10 -

2 stops22h 55m

Thu 11/316:20 -

2 stops40h 45m

Deal found 24/10£1,106

Fri 1/108:05 -

1 stop35h 45m

Sun 17/116:55 -

1 stop24h 45m

Deal found 25/10£1,150

Thu 14/111:05 -

2 stops54h 02m

Sat 23/117:17 -

2 stops34h 38m

Deal found 22/10£1,250

Thu 5/1110:00 -

2 stops33h 12m

Tue 9/216:35 -

1 stop33h 50m

Deal found 25/10£1,259

Wed 17/210:35 -

1 stop12h 25m

Wed 3/315:45 -

1 stop12h 45m

Deal found 24/10£789

Thu 3/1219:10 -

2 stops24h 29m

Tue 22/1215:47 -

1 stop15h 43m

Deal found 26/10£810

Mon 1/313:20 -

1 stop26h 45m

Sun 14/315:45 -

1 stop12h 45m

Deal found 21/10£855

Thu 4/215:00 -

2 stops32h 00m

Tue 16/212:35 -

2 stops18h 45m

Deal found 23/10£874

Thu 3/1220:10 -

2 stops22h 54m

Wed 16/1216:26 -

2 stops34h 24m

Deal found 21/10£1,153

Fri 6/1112:40 -

1 stop30h 32m

Tue 9/216:35 -

1 stop33h 50m

Deal found 25/10£1,264

Mon 9/1108:00 -

1 stop14h 55m

Wed 18/1112:35 -

1 stop18h 20m

Deal found 23/10£983

Fri 4/1220:25 -

3 stops46h 05m

Mon 14/1217:20 -

2 stops34h 35m

Deal found 23/10£985

Thu 3/1220:35 -

2 stops45h 21m

Wed 16/1216:55 -

2 stops37h 55m

Deal found 23/10£1,022

Sun 13/1208:50 -

3 stops35h 50m

Sun 27/1217:35 -

3 stops35h 30m

Deal found 23/10£1,193

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£643
One-way from	£424

Air Canada
19/11-26/11
2 total stops
68h 25m total
London to Saint Lucia

Search Deals

JetBlue
19/11-31/12
1 total stop
31h 42m 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

Thu 19/11

12:20-16:02

1 stop31h 42m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£424

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

£429

LondonCastries

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

LHRSLU

London Heathrow

Wed 11/11

08:55-17:15

2 stops36h 20m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£524

LondonCastries

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

LHRSLU

London Heathrow

Sun 28/2

09:00-16:05

3 stops35h 05m

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 19/11

14:50-16:40

3 stops29h 50m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£654

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Tue 15/12

13:00-16:40

2 stops31h 40m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£677

LondonCastries

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

LHRSLU

London Heathrow

Thu 19/11

06:40-18:00

3 stops39h 20m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£680

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sat 19/12

20:45-16:40

2 stops47h 55m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£714

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Thu 17/12

12:25-16:40

3 stops32h 15m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£719

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Thu 3/12

14:30-13:32

1 stop27h 02m

Castries Hewanorra

Wed 23/12

16:15-12:00

1 stop15h 45m

£747

Flights are sorted by cheapest return flights first.

Deals found on 22/10

Showing 1-10 of 32 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 £584). Flying from London Heathrow Airport to Saint Lucia in June is currently the most expensive (average of £1,007). 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

12,193 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

12,193 reviews

American Airlines

7.0

Good

12,193 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

8,268 reviews

American Airlines

7.0

Good

12,193 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 4h 07m. 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 £584). Flying from London Heathrow Airport to Saint Lucia in June is currently the most expensive (average of £1,007). 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 2 airlines flying from Heathrow to Saint Lucia

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£507	Average£758	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£573	Average£864	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 £424

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/11. 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 26 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 26 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 26 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 26 October 2026.

Last-minute flights from Heathrow to Saint LuciaDiscover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 26 October 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 26 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 26 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 26 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 26 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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Travel Smart

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 26 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 26 October 2026.

Last-minute flights from Heathrow to Saint Lucia
Discover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 26 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 26 October 2026.