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

United Airlines, KLM, and Delta can get you from London Heathrow Airport to Saint Lucia in just under 29h 02m. Your travel time can differ by up to 5h 14m. 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.

£455+ 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 November 2026.

Sun 8/1111:10 -

1 stop33h 30m

Mon 16/1117:35 -

1 stop34h 55m

Deal found 1/11£646

Wed 2/1213:45 -

2 stops54h 55m

Wed 9/1217:35 -

2 stops23h 25m

Deal found 2/11£649

Wed 18/1115:00 -

1 stop29h 40m

Sun 22/1117:35 -

1 stop34h 55m

Deal found 2/11£652

Wed 11/1118:00 -

1 stop26h 40m

Sun 7/217:35 -

1 stop32h 55m

Deal found 5/11£653

Wed 11/1112:05 -

2 stops56h 35m

Sun 7/217:35 -

1 stop34h 55m

Deal found 5/11£655

Thu 3/1213:25 -

2 stops31h 15m

Thu 10/1217:35 -

1 stop32h 55m

Deal found 2/11£661

Thu 26/1115:00 -

1 stop29h 40m

Mon 7/1217:35 -

1 stop34h 55m

Deal found 2/11£664

Sat 7/1115:00 -

1 stop29h 40m

Mon 16/1117:35 -

1 stop32h 55m

Deal found 1/11£670

Mon 30/1110:35 -

1 stop12h 25m

Sun 13/1215:45 -

1 stop12h 45m

Deal found 1/11£710

Mon 7/1213:20 -

1 stop26h 45m

Sun 13/1215:45 -

1 stop12h 45m

Deal found 5/11£716

Sun 6/1210:35 -

1 stop12h 25m

Sun 20/1215:45 -

1 stop12h 45m

Deal found 5/11£717

Mon 30/1110:35 -

1 stop29h 30m

Mon 7/1215:45 -

1 stop12h 45m

Deal found 2/11£718

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 November 2026.

Fri 15/110:35 -

1 stop12h 25m

Wed 27/112:35 -

1 stop13h 15m

Deal found 4/11£710

Fri 27/1112:05 -

2 stops29h 02m

Sat 5/1217:17 -

2 stops33h 23m

Deal found 31/10£959

Tue 17/1110:00 -

2 stops33h 05m

Tue 24/1116:25 -

1 stop15h 15m

Deal found 2/11£1,125

Thu 7/108:55 -

1 stop34h 16m

Wed 20/116:35 -

1 stop36h 25m

Deal found 1/11£1,163

Mon 30/1110:35 -

1 stop12h 25m

Sun 13/1215:45 -

1 stop12h 45m

Deal found 1/11£715

Sun 6/1210:35 -

1 stop12h 25m

Sun 20/1215:45 -

1 stop12h 45m

Deal found 5/11£717

Tue 19/110:35 -

1 stop12h 25m

Tue 26/115:45 -

1 stop12h 45m

Deal found 4/11£730

Mon 18/113:20 -

1 stop29h 55m

Thu 28/112:35 -

1 stop13h 15m

Deal found 1/11£739

Tue 8/1208:00 -

1 stop15h 00m

Mon 14/1215:45 -

1 stop15h 10m

Deal found 5/11£758

Mon 7/1210:00 -

2 stops33h 04m

Mon 14/1216:26 -

2 stops19h 39m

Deal found 5/11£1,266

Tue 15/1208:00 -

1 stop32h 05m

Tue 12/115:45 -

1 stop15h 10m

Deal found 4/11£799

Fri 11/1210:25 -

2 stops30h 42m

Mon 21/1215:21 -

2 stops35h 19m

Deal found 1/11£1,427

Wed 18/1113:25 -

1 stop29h 50m

Tue 22/1215:45 -

1 stop12h 45m

Deal found 3/11£814

Wed 16/1210:25 -

2 stops31h 50m

Wed 23/1215:21 -

1 stop34h 59m

Deal found 1/11£1,427

Tue 15/1216:20 -

2 stops49h 55m

Tue 22/1215:21 -

2 stops34h 34m

Deal found 31/10£1,429

Sun 31/111:45 -

2 stops31h 21m

Fri 19/216:25 -

1 stop15h 15m

Deal found 1/11£1,577

Sat 19/1212:40 -

1 stop30h 56m

Fri 1/116:56 -

1 stop14h 44m

Deal found 4/11£1,673

Tue 12/108:15 -

3 stops35h 50m

Tue 19/111:45 -

2 stops28h 25m

Deal found 1/11£1,096

Sat 26/1216:00 -

1 stop27h 36m

Sun 3/116:56 -

1 stop33h 29m

Deal found 31/10£1,684

Thu 7/120:50 -

3 stops25h 10m

Wed 13/116:50 -

2 stops23h 20m

Deal found 4/11£1,156

Tue 17/1109:00 -

3 stops35h 05m

Tue 1/1215:45 -

3 stops24h 25m

Deal found 3/11£1,201

Mon 11/115:00 -

2 stops32h 00m

Tue 19/111:45 -

2 stops28h 25m

Deal found 1/11£1,263

Find flight deals from Heathrow to Saint Lucia

Round-trip from	£649
One-way from	£455

SWISS
2/12-9/12
3 total stops
82h 55m total
London to Saint Lucia

Search Deals

JetBlue
6/1-31/12
1 total stop
36h 09m 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

Wed 6/1

07:25-15:34

1 stop36h 09m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£455

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Fri 29/1

08:05-11:31

1 stop31h 26m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£462

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sun 24/1

12:20-15:34

1 stop31h 14m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£462

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Fri 29/1

06:00-14:55

2 stops36h 55m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£517

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Thu 19/11

09:50-16:02

2 stops34h 12m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£517

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Wed 2/12

14:50-14:55

2 stops28h 05m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£520

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Sun 24/1

12:25-16:40

3 stops32h 15m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£532

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Tue 10/11

17:10-16:40

2 stops51h 30m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£559

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Thu 19/11

15:00-16:40

1 stop29h 40m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£565

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Thu 10/12

15:00-16:40

1 stop29h 40m

Castries Hewanorra

Wed 31/12

00:00-05:00

Nonstop0h 00m

£567

Flights are sorted by cheapest return flights first.

Deals found on 5/11

Showing 1-10 of 41 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-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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £580). Flying from London Heathrow Airport to Saint Lucia in June is currently the most expensive (average of £1,000). 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

12,233 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

12,233 reviews

American Airlines

7.0

Good

12,233 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

8,283 reviews

American Airlines

7.0

Good

12,233 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?
United Airlines, KLM, and Delta can get you from London Heathrow Airport to Saint Lucia in just under 29h 02m. Your travel time can differ by up to 5h 14m. 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 £580). Flying from London Heathrow Airport to Saint Lucia in June is currently the most expensive (average of £1,000). 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£504	Average£742	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£569	Average£858	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 £455

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/1. 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 5 November 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 November 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 November 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 November 2026.

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

Discover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 5 November 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 November 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 November 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 November 2026.

Popular flight searches

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Heathrow to Saint Lucia flights

Consider these flights travelling from Heathrow to Saint Lucia.

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 5 November 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 November 2026.

Last-minute flights from Heathrow to Saint Lucia
Discover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 5 November 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 November 2026.