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 £483. Users have also found prices from £634 and £760 on WestJet and KLM, respectively.

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 £614 for the month, but tickets can be as low as £412. 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.

£842+ Flights from London Heathrow Airport to Saint Lucia - Compare & Save Big

Cheap flight deals from Heathrow to Saint Lucia

Round-trip from	£555
One-way from	£480
Popular in	December
Cheapest in	September
Average price	£686

Icelandair
8/9-22/9
2 total stops
59h 24m total
London to Saint Lucia

Search Deals

18/8
1 total stop
14h 25m total
London to Saint Lucia

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (£59 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£26 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2025

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 29 April 2025.

Mon 8/908:15LHR - UVF

1 stop34h 44mIcelandair

Mon 22/915:05UVF - LHR

1 stop24h 40mIcelandair

Deal found 28/4£555

Thu 12/612:05LHR - UVF

1 stop31h 10mAir Canada

Tue 17/615:10UVF - LHR

1 stop34h 25mAir Canada

Deal found 28/4£585

Mon 3/1120:15LHR - UVF

2 stops47h 45mMultiple Airlines

Sun 9/1117:05UVF - LHR

1 stop35h 25mMultiple Airlines

Deal found 28/4£603

Mon 3/1108:00LHR - SLU

1 stop13h 30mMultiple Airlines

Sun 9/1112:10SLU - LHR

1 stop17h 25mMultiple Airlines

Deal found 28/4£662

Mon 19/520:10LHR - UVF

2 stops22h 56mDelta

Thu 5/615:26UVF - LHR

2 stops40h 09mDelta

Deal found 28/4£706

Thu 11/919:05LHR - UVF

2 stops23h 38mAmerican Airlines

Sat 27/915:34UVF - LHR

2 stops23h 11mAmerican Airlines

Deal found 29/4£708

Tue 6/516:35LHR - UVF

2 stops26h 36mFinnair

Tue 13/515:14UVF - LHR

2 stops36h 01mFinnair

Deal found 28/4£802

Sat 7/611:20LHR - UVF

2 stops31h 29mTurkish Airlines

Sun 15/615:30UVF - LHR

2 stops25h 55mTurkish Airlines

Deal found 28/4£920

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 29 April 2025.

Mon 8/908:15LHR - UVF

1 stop34h 44mIcelandair

Mon 22/915:05UVF - LHR

1 stop24h 40mIcelandair

Deal found 28/4£555

Thu 12/612:05LHR - UVF

1 stop31h 10mAir Canada

Tue 17/615:10UVF - LHR

1 stop34h 25mAir Canada

Deal found 28/4£585

Thu 12/611:30LHR - UVF

2 stops31h 45mMultiple Airlines

Tue 17/615:10UVF - LHR

2 stops34h 20mMultiple Airlines

Deal found 28/4£628

Mon 19/515:15LHR - UVF

1 stop27h 51mDelta

Thu 5/615:26UVF - LHR

2 stops36h 49mDelta

Deal found 28/4£706

Thu 11/919:05LHR - UVF

2 stops23h 38mAmerican Airlines

Sat 27/915:34UVF - LHR

2 stops23h 11mAmerican Airlines

Deal found 29/4£708

Wed 27/813:30LHR - UVF

2 stops29h 45mFinnair

Sun 7/915:34UVF - LHR

2 stops33h 16mFinnair

Deal found 29/4£809

Sat 7/611:20LHR - UVF

2 stops31h 29mTurkish Airlines

Sun 15/615:30UVF - LHR

2 stops25h 55mTurkish Airlines

Deal found 28/4£920

Mon 19/513:05LHR - UVF

1 stop30h 01mKLM

Sat 31/515:26UVF - LHR

1 stop34h 19mKLM

Deal found 28/4£1,198

Mon 8/911:25LHR - SLU

1 stop12h 35mMultiple Airlines

Mon 22/912:35SLU - LHR

1 stop12h 45mMultiple Airlines

Deal found 28/4£702

Last-minute flights from Heathrow to Saint Lucia
Discover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 29 April 2025 and is based on user searches.

Tue 29/415:15LHR - UVF

1 stop27h 44mKLM

Tue 13/515:26UVF - LHR

1 stop17h 04mKLM

Deal found 29/4£1,114

Tue 29/411:20LHR - UVF

2 stops31h 30mMultiple Airlines

Tue 13/515:09UVF - LHR

2 stops43h 51mMultiple Airlines

Deal found 29/4£1,435

Sun 4/511:25LHR - SLU

1 stop29h 30mMultiple Airlines

Sun 18/516:25SLU - LHR

1 stop32h 55mMultiple Airlines

Deal found 28/4£1,247

Tue 6/511:55LHR - UVF

1 stop30h 54mIcelandair

Tue 20/515:09UVF - LHR

2 stops58h 21mIcelandair

Deal found 28/4£787

Tue 6/516:35LHR - UVF

2 stops26h 36mFinnair

Tue 13/515:14UVF - LHR

2 stops36h 01mFinnair

Deal found 28/4£802

Tue 6/511:00LHR - UVF

1 stop32h 11mAmerican Airlines

Wed 14/515:14UVF - LHR

1 stop16h 16mAmerican Airlines

Deal found 29/4£808

Tue 6/510:55LHR - UVF

2 stops32h 11mDelta

Tue 13/515:26UVF - LHR

1 stop17h 04mDelta

Deal found 29/4£870

Thu 8/508:30LHR - UVF

1 stop34h 45mAir Canada

Fri 16/515:10UVF - LHR

2 stops34h 10mAir Canada

Deal found 28/4£2,067

Thu 8/511:20LHR - UVF

1 stop31h 46mKLM

Fri 16/515:26UVF - LHR

1 stop34h 49mKLM

Deal found 28/4£2,685

Tue 13/508:15LHR - UVF

1 stop34h 34mIcelandair

Tue 20/515:09UVF - LHR

2 stops58h 21mIcelandair

Deal found 29/4£647

Mon 19/508:30LHR - UVF

1 stop34h 45mAir Canada

Tue 3/615:10UVF - LHR

1 stop15h 40mAir Canada

Deal found 28/4£695

Mon 19/520:10LHR - UVF

2 stops22h 56mDelta

Thu 5/615:26UVF - LHR

2 stops40h 09mDelta

Deal found 28/4£706

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 29 April 2025.

Mon 18/808:05LHR - SLU

1 stop14h 25mMultiple Airlines

Deal found 28/4£480

Wed 22/1015:10LHR - UVF

2 stops52h 05mAir Canada

Deal found 28/4£483

Sat 17/514:10LHR - UVF

2 stops28h 35mWestJet

Deal found 28/4£634

Wed 22/1015:15LHR - UVF

1 stop28h 02mKLM

Deal found 28/4£760

Sat 17/508:15LHR - UVF

1 stop34h 34mIcelandair

Deal found 29/4£831

Wed 2/715:15LHR - UVF

1 stop28h 01mDelta

Deal found 28/4£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

Mon 8/9

08:15-13:59

1 stop34h 44m

Castries Hewanorra

Mon 22/9

15:05-20:45

1 stop24h 40m

£555

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 12/6

12:05-14:15

1 stop31h 10m

Castries Hewanorra

Tue 17/6

15:10-06:35

1 stop34h 25m

£585

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 12/6

11:30-14:15

2 stops31h 45m

Castries Hewanorra

Tue 17/6

15:10-06:30

2 stops34h 20m

£628

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 8/9

11:25-19:00

1 stop12h 35m

Castries George F. L. Charle

Mon 22/9

12:35-06:20

1 stop12h 45m

£702

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 19/5

20:10-14:06

2 stops22h 56m

Castries Hewanorra

Thu 5/6

15:26-12:35

2 stops40h 09m

£706

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 11/9

09:55-13:43

1 stop32h 48m

Castries Hewanorra

Sat 27/9

15:34-06:55

1 stop34h 21m

£708

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 27/8

13:30-14:15

2 stops29h 45m

Castries Hewanorra

Sun 7/9

15:34-05:50

2 stops33h 16m

£809

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sat 7/6

11:20-13:49

2 stops31h 29m

Castries Hewanorra

Sun 15/6

15:30-22:25

2 stops25h 55m

£920

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 19/5

13:05-14:06

1 stop30h 01m

Castries Hewanorra

Sat 31/5

15:26-06:45

1 stop34h 19m

£1,198

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 18/8

08:05-17:30

1 stop14h 25m

£480

Flights are sorted by cheapest return flights first.

Deals found on 28/4

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

7,929 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

7,929 reviews

Delta

8.0

Very Good

7,929 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

1,333 reviews

Delta

8.0

Very Good

7,929 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

1,273 reviews

Delta

8.0

Very Good

7,929 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

Turkish Airlines

7.3

Good

3,788 reviews

Delta

8.0

Very Good

7,929 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

7,929 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 £483. Users have also found prices from £634 and £760 on WestJet and KLM, respectively.
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 Kingston flights

Gatwick to Montego Bay flights

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London City to Kingston flights

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Heathrow to Castries flights

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Gatwick to Luis Munoz Marin Intl flights

Heathrow to Pointe-à-Pitre flights

Gatwick to Santo Domingo flights

Gatwick to St. George's flights

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Luton to Montego Bay flights

Stansted to Montego Bay flights

Heathrow to Port of Spain flights

Gatwick to Castries flights

Heathrow to Roseau flights

Stansted to Kingston flights

Stansted to Punta Cana flights

Gatwick to Nassau flights

Heathrow to St. George's flights

Gatwick to Basseterre flights

London City to Bridgetown flights

Heathrow to George Town flights

London City to Castries flights

Heathrow to St. John's flights

Luton to Punta Cana flights

Gatwick to Havana flights

Gatwick to Pointe-à-Pitre flights

London City to Luis Munoz Marin Intl flights

Heathrow to Kingstown flights

Gatwick to St. John's flights

London City to Santo Domingo flights

Heathrow to Basseterre flights

Gatwick to Port of Spain flights

Gatwick to Roseau flights

Heathrow to Providenciales flights

Heathrow to Havana flights

Stansted to Bridgetown flights

Stansted to Santo Domingo flights

London City to Nassau flights

Gatwick to George Town flights

Heathrow to Road Town 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£427	Average£633	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£435	Average£637	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
KLM	Cheapest£514	Average£1,321	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Air Canada	Cheapest£516	Average£624	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Finnair	Cheapest£645	Average£827	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 £480

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 18/8. 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 29 April 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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 29 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 29 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 29 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?

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 29 April 2025.