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 31h 27m. Your travel time can differ by up to 34m. 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.

£403+ 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 8 October 2026.

Sun 8/1115:00 -

1 stop29h 40m

Mon 23/1117:35 -

1 stop32h 55m

Deal found 6/10£652

Thu 5/1111:10 -

1 stop33h 30m

Thu 19/1117:35 -

1 stop32h 55m

Deal found 7/10£663

Thu 19/1113:25 -

2 stops31h 15m

Thu 26/1117:35 -

2 stops23h 25m

Deal found 5/10£673

Thu 5/1115:00 -

1 stop29h 40m

Fri 13/1117:35 -

1 stop34h 55m

Deal found 6/10£680

Sun 8/1108:00 -

1 stop15h 00m

Mon 23/1115:45 -

1 stop15h 10m

Deal found 6/10£732

Tue 3/1108:00 -

1 stop15h 00m

Tue 10/1115:45 -

1 stop15h 10m

Deal found 4/10£733

Mon 30/1110:35 -

1 stop12h 25m

Sun 13/1215:45 -

1 stop12h 45m

Deal found 5/10£735

Mon 2/1108:00 -

1 stop14h 55m

Sun 8/1109:10 -

1 stop18h 45m

Deal found 5/10£743

Wed 4/1108:00 -

1 stop32h 05m

Tue 10/1115:45 -

1 stop15h 10m

Deal found 4/10£745

Fri 13/1108:00 -

1 stop15h 00m

Sat 21/1115:45 -

1 stop15h 10m

Deal found 7/10£788

Sat 21/1114:45 -

1 stop32h 15m

Sat 28/1115:45 -

1 stop15h 10m

Deal found 7/10£791

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 8 October 2026.

Sun 8/1111:40 -

2 stops32h 01m

Mon 23/1114:38 -

2 stops24h 22m

Deal found 3/10£704

Wed 17/210:35 -

1 stop12h 25m

Wed 3/315:45 -

1 stop12h 45m

Deal found 8/10£729

Sat 10/1011:45 -

2 stops31h 27m

Tue 10/1116:25 -

1 stop15h 15m

Deal found 5/10£952

Fri 23/1011:05 -

2 stops31h 26m

Sat 31/1016:17 -

2 stops58h 23m

Deal found 7/10£1,030

Tue 1/1211:45 -

1 stop31h 39m

Mon 14/1216:41 -

2 stops22h 19m

Deal found 7/10£712

Mon 30/1110:35 -

1 stop12h 25m

Sun 13/1215:45 -

1 stop12h 45m

Deal found 5/10£735

Sat 31/1012:10 -

1 stop31h 31m

Sat 7/1114:32 -

2 stops17h 28m

Deal found 3/10£715

Sat 6/213:25 -

1 stop29h 50m

Sun 14/212:35 -

1 stop13h 15m

Deal found 7/10£742

Tue 17/1113:25 -

1 stop26h 40m

Tue 24/1115:45 -

1 stop12h 45m

Deal found 3/10£744

Sat 10/1011:45 -

2 stops31h 27m

Thu 5/1116:32 -

1 stop15h 08m

Deal found 4/10£952

Fri 23/1015:15 -

1 stop27h 57m

Sat 31/1015:32 -

2 stops35h 48m

Deal found 5/10£952

Thu 21/113:25 -

1 stop29h 50m

Thu 18/212:35 -

1 stop13h 15m

Deal found 4/10£822

Sat 12/1212:10 -

1 stop31h 29m

Tue 22/1213:58 -

1 stop18h 07m

Deal found 5/10£1,029

Mon 9/1113:20 -

1 stop29h 55m

Fri 27/1115:45 -

1 stop12h 45m

Deal found 6/10£882

Thu 14/114:45 -

1 stop28h 30m

Thu 28/115:45 -

1 stop15h 10m

Deal found 3/10£949

Tue 1/1218:00 -

2 stops29h 00m

Mon 14/1209:10 -

2 stops22h 10m

Deal found 7/10£983

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£652
One-way from	£403

Air Canada
8/11-23/11
2 total stops
62h 35m total
London to Saint Lucia

Search Deals

JetBlue
27/11-31/12
1 total stop
31h 51m 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 27/11

08:05-16:11

1 stop36h 06m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£404

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Fri 27/11

12:15-14:50

2 stops30h 35m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£413

Fastest return journey

LondonCastries

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

LHRSLU

London Heathrow

Thu 31/12

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£537

LondonCastries

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

LHRSLU

London Heathrow

Sat 30/1

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£565

LondonCastries

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

LHRSLU

London Heathrow

Fri 1/1

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 - SLU Castries George F. L. Charle

LHRSLU

London Heathrow

Wed 30/12

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£593

LondonCastries

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

LHRSLU

London Heathrow

Tue 29/12

14:45-15:15

1 stop28h 30m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£633

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Fri 30/10

13:35-15:25

1 stop29h 50m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£664

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sun 8/11

11:40-15:41

2 stops32h 01m

Castries Hewanorra

Mon 23/11

14:38-19:00

2 stops24h 22m

£704

LondonCastries

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

LHRSLU

London Heathrow

Sun 13/12

12:25-19:00

3 stops34h 35m

Castries George F. L. Charle

Wed 31/12

00:00-05:00

Nonstop0h 00m

£706

Flights are sorted by cheapest return flights first.

Deals found on 4/10

Showing 1-10 of 31 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 £590). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,231). 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

12,130 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

12,130 reviews

American Airlines

7.0

Good

12,130 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

8,249 reviews

American Airlines

7.0

Good

12,130 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 31h 27m. Your travel time can differ by up to 34m. 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 £590). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,231). 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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Complete your trip

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Alternative routes for Heathrow to Saint Lucia

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Gatwick to Roseau flights

Top 2 airlines flying from Heathrow to Saint Lucia

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£513	Average£807	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£579	Average£874	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 £403

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/11. 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 8 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 8 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 8 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 8 October 2026.

Last-minute flights from Heathrow to Saint LuciaDiscover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 8 October 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 8 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 8 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 8 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 8 October 2026.

Popular flight searches

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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 8 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 8 October 2026.

Last-minute flights from Heathrow to Saint Lucia
Discover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 8 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 8 October 2026.