What are the cheapest airlines to fly from London Heathrow Airport to Saint Lucia one-way?

For one-way options, check prices for Air Canada. According to our data, you can fly for as low as £512. Users have also found prices from £569 and £577 on United Airlines and WestJet, respectively.

What are the cheapest flights from London Heathrow Airport to Saint Lucia?

While on average a flight from London Heathrow Airport to Saint Lucia is generally £528, our data shows the cheapest flight currently is £513. When looking at the most popular route, (London Heathrow - Castries Hewanorra), you can expect to pay £544 for that flight.

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: Air Canada, Finnair or British Airways.

What is the cheapest day to fly round-trip from London Heathrow Airport to Saint Lucia?

Flying to your destination on a Friday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to Saint Lucia. Check prices with Cheapflights to find a great deal for your trip.

What is the cheapest month to fly from London Heathrow Airport to Saint Lucia?

Our data shows that September tends to be the cheapest month to fly to Saint Lucia from London Heathrow Airport. Users have commonly found prices around £623 for the month, but tickets can be as low as £419. Due to multiple factors, prepare for potentially higher prices in December.

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.

£836+ Flights from London Heathrow Airport to Saint Lucia

Cheap flight deals from Heathrow to Saint Lucia

Round-trip from	£561
One-way from	£414
Popular in	December
Cheapest in	September
Average price	£696
Good round-trip deal	£522 or less

Air Canada
5/6-13/6
2 total stops
41h 15m total
London to Saint Lucia

Search Deals

8/5
3 total stops
52h 55m total
London to Saint Lucia

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (£60 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£27 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from London Heathrow to Saint Lucia.

Search Deals

Find flight deals from Heathrow to Saint Lucia

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 15 April 2025.

Wed 3/1219:25LHR - UVF

2 stops48h 35mAir Canada

Wed 17/1217:05UVF - LHR

1 stop33h 25mAir Canada

Deal found 14/4£543

Fri 2/508:15LHR - UVF

1 stop31h 50mIcelandair

Fri 9/515:09UVF - LHR

1 stop24h 36mIcelandair

Deal found 14/4£704

Wed 3/912:55LHR - UVF

2 stops30h 20mDelta

Thu 2/1015:38UVF - LHR

2 stops23h 22mDelta

Deal found 14/4£707

Sat 6/1214:30LHR - UVF

1 stop26h 30mFinnair

Sat 13/1213:40UVF - LHR

1 stop15h 00mFinnair

Deal found 14/4£709

Thu 4/1211:45LHR - UVF

1 stop30h 35mAmerican Airlines

Sat 13/1213:40UVF - LHR

1 stop14h 55mAmerican Airlines

Deal found 14/4£712

Mon 6/1011:25LHR - SLU

1 stop12h 35mMultiple Airlines

Mon 13/1009:25SLU - LHR

1 stop15h 55mMultiple Airlines

Deal found 14/4£715

Thu 5/608:30LHR - UVF

1 stop34h 45mMultiple Airlines

Sat 14/616:00UVF - LHR

2 stops60h 35mMultiple Airlines

Deal found 14/4£786

Tue 2/915:15LHR - UVF

1 stop28h 00mKLM

Tue 9/915:38UVF - LHR

1 stop16h 52mKLM

Deal found 14/4£1,022

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 15 April 2025.

Thu 5/617:40LHR - UVF

1 stop25h 35mAir Canada

Fri 13/615:10UVF - LHR

1 stop15h 40mAir Canada

Deal found 14/4£561

Fri 2/508:15LHR - UVF

1 stop31h 50mIcelandair

Fri 9/515:09UVF - LHR

1 stop24h 36mIcelandair

Deal found 14/4£704

Wed 3/912:55LHR - UVF

2 stops30h 20mDelta

Thu 2/1015:38UVF - LHR

2 stops23h 22mDelta

Deal found 14/4£707

Mon 6/1011:25LHR - SLU

1 stop12h 35mMultiple Airlines

Mon 13/1009:25SLU - LHR

1 stop15h 55mMultiple Airlines

Deal found 14/4£715

Tue 6/519:05LHR - UVF

2 stops23h 29mFinnair

Tue 13/515:14UVF - LHR

2 stops33h 36mFinnair

Deal found 14/4£756

Wed 7/512:15LHR - UVF

1 stop30h 19mAmerican Airlines

Wed 14/514:34UVF - LHR

1 stop15h 01mAmerican Airlines

Deal found 14/4£760

Tue 2/915:15LHR - UVF

1 stop28h 00mKLM

Tue 9/915:38UVF - LHR

1 stop16h 52mKLM

Deal found 14/4£1,022

Thu 5/608:30LHR - UVF

1 stop34h 45mMultiple Airlines

Sat 14/616:00UVF - LHR

2 stops60h 35mMultiple Airlines

Deal found 14/4£786

Last-minute flights from Heathrow to Saint Lucia
Discover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 15 April 2025 and is based on user searches.

Sun 20/408:30LHR - UVF

1 stop35h 15mAir Canada

Sun 27/415:45UVF - LHR

1 stop36h 50mAir Canada

Deal found 14/4£750

Wed 23/409:40LHR - UVF

2 stops33h 19mDelta

Sat 3/515:19UVF - LHR

1 stop17h 11mDelta

Deal found 14/4£709

Wed 23/420:10LHR - UVF

2 stops23h 18mFinnair

Sat 3/514:20UVF - LHR

2 stops35h 45mFinnair

Deal found 14/4£804

Fri 25/419:05LHR - UVF

2 stops23h 55mAmerican Airlines

Sun 4/515:28UVF - LHR

2 stops22h 27mAmerican Airlines

Deal found 15/4£1,138

Fri 25/411:25LHR - SLU

1 stop12h 35mMultiple Airlines

Sun 4/514:00SLU - LHR

2 stops19h 15mMultiple Airlines

Deal found 15/4£1,762

Fri 2/508:15LHR - UVF

1 stop31h 50mIcelandair

Fri 9/515:09UVF - LHR

1 stop24h 36mIcelandair

Deal found 14/4£704

Tue 6/519:05LHR - UVF

2 stops23h 29mFinnair

Tue 13/515:14UVF - LHR

2 stops33h 36mFinnair

Deal found 14/4£756

Wed 7/512:15LHR - UVF

1 stop30h 19mAmerican Airlines

Wed 14/514:34UVF - LHR

1 stop15h 01mAmerican Airlines

Deal found 14/4£760

Thu 8/515:15LHR - UVF

1 stop27h 51mKLM

Fri 16/515:26UVF - LHR

1 stop34h 49mKLM

Deal found 14/4£2,406

Fri 16/506:30LHR - UVF

2 stops33h 35mMultiple Airlines

Sat 24/512:25UVF - LHR

2 stops27h 25mMultiple Airlines

Deal found 14/4£3,387

Sat 24/518:50LHR - SLU

2 stops21h 55mMultiple Airlines

Wed 28/510:15SLU - LHR

2 stops40h 00mMultiple Airlines

Deal found 14/4£835

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 15 April 2025.

Thu 8/522:15LHR - SLU

3 stops52h 55mMultiple Airlines

Deal found 14/4£414

Thu 8/511:20LHR - UVF

3 stops31h 55mMultiple Airlines

Deal found 14/4£429

Wed 2/717:40LHR - UVF

2 stops49h 35mAir Canada

Deal found 14/4£512

Thu 8/510:00LHR - UVF

2 stops58h 30mUnited Airlines

Deal found 14/4£569

Sat 17/514:10LHR - UVF

2 stops28h 35mWestJet

Deal found 14/4£577

Sat 17/513:05LHR - UVF

1 stop30h 01mKLM

Deal found 14/4£765

Wed 2/709:20LHR - UVF

1 stop33h 56mDelta

Deal found 14/4£1,358

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

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 5/6

17:40-14:15

1 stop25h 35m

Castries Hewanorra

Fri 13/6

15:10-11:50

1 stop15h 40m

£561

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 2/5

08:15-11:05

1 stop31h 50m

Castries Hewanorra

Fri 9/5

15:09-20:45

1 stop24h 36m

£704

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 3/9

12:55-14:15

2 stops30h 20m

Castries Hewanorra

Thu 2/10

15:38-20:00

2 stops23h 22m

£707

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 6/10

11:25-19:00

1 stop12h 35m

Castries George F. L. Charle

Mon 13/10

09:25-06:20

1 stop15h 55m

£715

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 6/5

19:05-13:34

2 stops23h 29m

Castries Hewanorra

Tue 13/5

15:14-05:50

2 stops33h 36m

£756

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 7/5

12:15-13:34

1 stop30h 19m

Castries Hewanorra

Wed 14/5

14:34-10:35

1 stop15h 01m

£760

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 5/6

08:30-14:15

1 stop34h 45m

Castries Hewanorra

Sat 14/6

16:00-09:35

2 stops60h 35m

£786

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 2/9

15:15-14:15

1 stop28h 00m

Castries Hewanorra

Tue 9/9

15:38-13:30

1 stop16h 52m

£1,022

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 8/5

22:15-22:10

3 stops52h 55m

£414

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 8/5

11:20-14:15

3 stops31h 55m

£429

Flights are sorted by cheapest return flights first.

Deals found on 14/4

Showing 1-10 of 15 results

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.

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

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

Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £328). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,100). 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.

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

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Saint Lucia at midday. If you’re flexible enough to do this you can expect to save up to 8% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from London Heathrow Airport to Saint Lucia?

Travellers seeking maximum savings on their London Heathrow Airport to Saint Lucia flight should consider departing on Monday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Saint Lucia

To help decide which airline to fly from London to Saint Lucia, see what other customers have to say about Delta, KLM and Finnair. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

6.0

Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

Delta

8.0

Very Good

7,917 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

6.0

Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

KLM

7.8

Good

1,323 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

6.0

Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

Finnair

7.6

Good

1,269 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

6.0

Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

United Airlines

7.4

Good

8,656 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

6.0

Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

6.0

Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

Related info for your journey

What are the cheapest airlines to fly from London Heathrow Airport to Saint Lucia one-way?
For one-way options, check prices for Air Canada. According to our data, you can fly for as low as £512. Users have also found prices from £569 and £577 on United Airlines and WestJet, respectively.
What are the cheapest flights from London Heathrow Airport to Saint Lucia?
While on average a flight from London Heathrow Airport to Saint Lucia is generally £528, our data shows the cheapest flight currently is £513. When looking at the most popular route, (London Heathrow - Castries Hewanorra), you can expect to pay £544 for that flight.
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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £328). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £1,100). 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

Alternative routes for Heathrow to Saint Lucia

Heathrow to Montego Bay flights

Heathrow to Bridgetown flights

Heathrow to Kingston flights

Gatwick to Bridgetown flights

Gatwick to Montego Bay flights

Heathrow to Nassau flights

Gatwick to Punta Cana flights

Heathrow to Punta Cana flights

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Heathrow to Luis Munoz Marin Intl flights

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London City to Montego Bay flights

London City to Kingston flights

Heathrow to Kingstown flights

Heathrow to St. George's flights

London City to Punta Cana flights

Heathrow to Castries flights

Gatwick to Luis Munoz Marin Intl flights

Heathrow to St. John's flights

Gatwick to Nassau flights

Gatwick to St. George's flights

Gatwick to Santo Domingo flights

Heathrow to Roseau flights

Heathrow to Port of Spain flights

Stansted to Montego Bay flights

Gatwick to St. John's flights

Gatwick to Castries flights

Heathrow to Pointe-à-Pitre flights

Luton to Montego Bay flights

Heathrow to George Town flights

Stansted to Punta Cana flights

Gatwick to Havana flights

London City to Castries flights

Gatwick to Roseau flights

Gatwick to Basseterre flights

London City to Bridgetown flights

Gatwick to Kingstown flights

Heathrow to Oranjestad flights

London City to Luis Munoz Marin Intl flights

Stansted to Bridgetown flights

Gatwick to George Town flights

Stansted to Kingston flights

Heathrow to Castries flights

London City to Santo Domingo flights

Heathrow to Basseterre flights

Gatwick to Port of Spain flights

Heathrow to Havana flights

Luton to Punta Cana flights

Gatwick to Oranjestad flights

Heathrow to Providenciales flights

Direct flights to

Direct flights to Montego Bay

Direct flights to Bridgetown

Direct flights to Kingston

Direct flights to Punta Cana

Direct flights to Port of Spain

Direct flights to St. John's

Direct flights to St. George's

Direct flights to Kingstown

Direct flights to Nassau

Direct flights to Castries

Direct flights to George Town

Direct flights to Providenciales

Direct flights to Basseterre

Direct flights to Oranjestad

Direct flights to Scarborough

Top 5 airlines flying from Heathrow to Saint Lucia

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£434	Average£643	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£441	Average£646	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
KLM	Cheapest£522	Average£1,341	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Air Canada	Cheapest£524	Average£599	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Finnair	Cheapest£655	Average£840	FlexibilityNo cancel fee	On-time76%	Search Finnair flights

Fly with Cheapflights

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 £414

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 8/5. 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

Keep the following information in mind while searching for Heathrow to Saint Lucia flight deals. Data was last updated 15 April 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Find 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 15 April 2025.

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 15 April 2025.

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

Everything you need to know about your flight from London Heathrow Airport to Saint Lucia

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

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

Find hourly flight availability from Heathrow to Saint Lucia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 April 2025.

What is the cheapest day to fly from London Heathrow Airport to Saint Lucia?

Use this chart to determine the cheapest time to fly return from Heathrow to Saint Lucia. Price data was last updated on 16 December 2024.

Reviews of airlines servicing Saint Lucia

To help decide which airline to fly from London to Saint Lucia, see what other customers have to say about Delta, KLM and Finnair. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Saint Lucia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from London Heathrow Airport to Saint Lucia one-way?

What are the cheapest flights 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.

Top 5 airlines flying from Heathrow to Saint Lucia

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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 15 April 2025.