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 £469. Users have also found prices from £564 and £636 on United Airlines and WestJet, 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 £598 for the month, but tickets can be as low as £406. 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.

£835+ Flights from London Heathrow Airport to Saint Lucia

Cheap flight deals from Heathrow to Saint Lucia

Round-trip from	£562
One-way from	£469
Popular in	December
Cheapest in	September
Average price	£506

Air Canada
3/11-10/11
2 total stops
61h 25m total
London to Saint Lucia

Search Deals

Air Canada
17/9
2 total stops
55h 15m total
London to Saint Lucia

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (£57 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease (£25 potential savings vs. average return price).

Search Deals

Average for round-trip flights in June 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 13 June 2025.

Mon 3/1118:00LHR - UVF

1 stop26h 00mAir Canada

Mon 10/1117:05UVF - LHR

1 stop35h 25mAir Canada

Deal found 11/6£562

Thu 4/908:05LHR - SLU

1 stop11h 30mMultiple Airlines

Thu 11/915:20SLU - LHR

1 stop11h 30mMultiple Airlines

Deal found 11/6£625

Mon 10/1108:25LHR - UVF

2 stops35h 09mIcelandair

Mon 24/1116:54UVF - LHR

1 stop23h 51mIcelandair

Deal found 12/6£628

Wed 1/1015:15LHR - UVF

1 stop28h 08mMultiple Airlines

Wed 8/1015:32UVF - LHR

1 stop34h 43mMultiple Airlines

Deal found 13/6£691

Fri 31/1012:15LHR - UVF

2 stops30h 02mDelta

Thu 13/1116:35UVF - LHR

1 stop33h 50mDelta

Deal found 11/6£703

Mon 8/909:55LHR - UVF

1 stop33h 22mAmerican Airlines

Mon 22/915:17UVF - LHR

1 stop14h 18mAmerican Airlines

Deal found 11/6£706

Tue 26/809:20LHR - UVF

1 stop33h 55mAlaska Airlines

Thu 4/915:35UVF - LHR

1 stop16h 55mAlaska Airlines

Deal found 13/6£717

Mon 28/710:05LHR - UVF

2 stops33h 15mIberia

Mon 4/815:20UVF - LHR

1 stop16h 10mIberia

Deal found 12/6£895

Mon 28/709:15LHR - UVF

1 stop34h 05mRoyal Air Maroc

Mon 4/815:20UVF - LHR

1 stop16h 10mRoyal Air Maroc

Deal found 12/6£899

Fri 17/1016:40LHR - UVF

2 stops25h 51mUnited Airlines

Sat 1/1116:17UVF - LHR

1 stop14h 48mUnited Airlines

Deal found 12/6£903

Sun 27/717:00LHR - UVF

2 stops26h 00mBritish Airways

Sun 3/815:20UVF - LHR

2 stops34h 00mBritish Airways

Deal found 12/6£925

Wed 2/719:05LHR - UVF

2 stops23h 40mFinnair

Wed 16/715:00UVF - LHR

1 stop14h 35mFinnair

Deal found 12/6£949

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 13 June 2025.

Mon 3/1118:00LHR - UVF

1 stop26h 00mAir Canada

Mon 10/1117:05UVF - LHR

1 stop35h 25mAir Canada

Deal found 11/6£562

Thu 4/908:05LHR - SLU

1 stop11h 30mMultiple Airlines

Thu 11/915:20SLU - LHR

1 stop11h 30mMultiple Airlines

Deal found 11/6£625

Mon 10/1108:25LHR - UVF

2 stops35h 09mIcelandair

Mon 24/1116:54UVF - LHR

1 stop23h 51mIcelandair

Deal found 12/6£628

Fri 31/1008:50LHR - UVF

2 stops33h 27mDelta

Wed 12/1116:35UVF - LHR

2 stops23h 35mDelta

Deal found 11/6£703

Mon 8/909:55LHR - UVF

1 stop33h 22mAmerican Airlines

Mon 22/915:17UVF - LHR

1 stop14h 18mAmerican Airlines

Deal found 11/6£706

Tue 26/809:20LHR - UVF

1 stop33h 55mAlaska Airlines

Thu 4/915:35UVF - LHR

1 stop16h 55mAlaska Airlines

Deal found 13/6£717

Mon 28/710:05LHR - UVF

2 stops33h 15mIberia

Mon 4/815:20UVF - LHR

1 stop16h 10mIberia

Deal found 12/6£895

Mon 28/709:15LHR - UVF

1 stop34h 05mRoyal Air Maroc

Mon 4/815:20UVF - LHR

1 stop16h 10mRoyal Air Maroc

Deal found 12/6£899

Fri 17/1016:40LHR - UVF

2 stops25h 51mUnited Airlines

Sat 1/1116:17UVF - LHR

1 stop14h 48mUnited Airlines

Deal found 12/6£903

Sun 27/717:00LHR - UVF

2 stops26h 00mBritish Airways

Sun 3/815:20UVF - LHR

2 stops34h 00mBritish Airways

Deal found 12/6£925

Wed 2/719:05LHR - UVF

2 stops23h 40mFinnair

Wed 16/715:00UVF - LHR

1 stop14h 35mFinnair

Deal found 11/6£949

Sat 12/708:15LHR - UVF

1 stop35h 12mJetBlue

Tue 29/717:31UVF - LHR

1 stop22h 14mJetBlue

Deal found 12/6£1,033

Last-minute flights from Heathrow to Saint Lucia
Discover last-minute flight deals from Heathrow to Saint Lucia. Data last updated 13 June 2025 and is based on user searches.

Sat 14/617:50LHR - UVF

1 stop24h 55mMultiple Airlines

Fri 20/615:10UVF - LHR

1 stop14h 30mMultiple Airlines

Deal found 12/6£1,020

Mon 16/613:05LHR - UVF

1 stop30h 11mKLM

Mon 23/615:36UVF - LHR

1 stop16h 54mKLM

Deal found 12/6£1,091

Tue 17/611:25LHR - SLU

1 stop12h 35mMultiple Airlines

Mon 7/712:35SLU - LHR

1 stop12h 45mMultiple Airlines

Deal found 10/6£817

Wed 18/612:15LHR - UVF

1 stop30h 30mAmerican Airlines

Wed 25/614:45UVF - LHR

1 stop14h 50mAmerican Airlines

Deal found 11/6£1,000

Thu 19/615:50LHR - UVF

1 stop27h 25mAir Canada

Tue 24/615:10UVF - LHR

2 stops24h 50mAir Canada

Deal found 12/6£665

Thu 19/616:05LHR - UVF

2 stops27h 11mDelta

Mon 23/615:36UVF - LHR

1 stop16h 54mDelta

Deal found 13/6£1,394

Thu 19/615:15LHR - UVF

1 stop28h 01mKLM

Mon 23/615:36UVF - LHR

1 stop16h 54mKLM

Deal found 13/6£1,423

Wed 2/719:05LHR - UVF

2 stops23h 40mFinnair

Wed 16/715:00UVF - LHR

1 stop14h 35mFinnair

Deal found 12/6£949

Fri 4/708:25LHR - UVF

2 stops36h 44mIcelandair

Fri 18/717:31UVF - LHR

1 stop34h 59mIcelandair

Deal found 12/6£759

Fri 4/712:55LHR - UVF

2 stops30h 21mDelta

Sat 19/715:38UVF - LHR

2 stops36h 12mDelta

Deal found 12/6£1,237

Sat 12/708:15LHR - UVF

1 stop35h 12mJetBlue

Tue 29/717:31UVF - LHR

1 stop22h 14mJetBlue

Deal found 12/6£1,033

Thu 24/711:00LHR - UVF

1 stop32h 20mAmerican Airlines

Thu 7/814:55UVF - LHR

1 stop16h 35mAmerican Airlines

Deal found 11/6£904

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 13 June 2025.

Wed 17/912:00LHR - UVF

2 stops55h 15mAir Canada

Deal found 11/6£469

Fri 19/916:40LHR - UVF

2 stops25h 51mUnited Airlines

Deal found 11/6£564

Sat 20/914:10LHR - UVF

2 stops28h 34mWestJet

Deal found 11/6£636

Wed 3/917:40LHR - SLU

3 stops30h 20mMultiple Airlines

Deal found 10/6£711

Tue 16/915:15LHR - UVF

1 stop28h 08mKLM

Deal found 11/6£779

Tue 15/711:25LHR - UVF

2 stops37h 00mMultiple Airlines

Deal found 12/6£1,186

Tue 16/916:05LHR - UVF

2 stops27h 18mDelta

Deal found 11/6£1,320

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 3/11

18:00-16:00

1 stop26h 00m

Castries Hewanorra

Mon 10/11

17:05-08:30

1 stop35h 25m

£562

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 4/9

08:05-14:35

1 stop11h 30m

Castries George F. L. Charle

Thu 11/9

15:20-07:50

1 stop11h 30m

£625

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 10/11

08:25-15:34

2 stops35h 09m

Castries Hewanorra

Mon 24/11

16:54-20:45

1 stop23h 51m

£628

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 1/10

15:15-14:23

1 stop28h 08m

Castries Hewanorra

Wed 8/10

15:32-07:15

1 stop34h 43m

£691

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 31/10

08:50-14:17

2 stops33h 27m

Castries Hewanorra

Wed 12/11

16:35-20:10

2 stops23h 35m

£703

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 8/9

09:55-14:17

1 stop33h 22m

Castries Hewanorra

Mon 22/9

15:17-10:35

1 stop14h 18m

£706

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Tue 26/8

09:20-14:15

1 stop33h 55m

Castries Hewanorra

Thu 4/9

15:35-13:30

1 stop16h 55m

£717

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 28/7

10:05-14:20

2 stops33h 15m

Castries Hewanorra

Mon 4/8

15:20-12:30

1 stop16h 10m

£895

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 28/7

09:15-14:20

1 stop34h 05m

Castries Hewanorra

Mon 4/8

15:20-12:30

1 stop16h 10m

£899

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 17/10

16:40-13:31

2 stops25h 51m

Castries Hewanorra

Sat 1/11

16:17-11:05

1 stop14h 48m

£903

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 20 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 10% 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, Alaska Airlines and KLM. 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

7,950 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

7,950 reviews

Delta

8.0

Very Good

7,950 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

Alaska Airlines

8.0

Very Good

10,000 reviews

Delta

8.0

Very Good

7,950 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

1,358 reviews

Delta

8.0

Very Good

7,950 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

1,290 reviews

Delta

8.0

Very Good

7,950 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

8,790 reviews

Delta

8.0

Very Good

7,950 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 £469. Users have also found prices from £564 and £636 on United Airlines and WestJet, 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

Gatwick to Montego Bay flights

Heathrow to Kingston flights

Gatwick to Kingston flights

Gatwick to Bridgetown flights

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Heathrow to Castries flights

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Heathrow to St. John's flights

London City to Kingston flights

Heathrow to St. George's flights

Luton to Montego Bay flights

Gatwick to St. John's flights

Heathrow to Port of Spain flights

Heathrow to Nassau flights

Gatwick to Luis Munoz Marin Intl flights

London City to Bridgetown flights

London City to Punta Cana flights

Stansted to Montego Bay flights

Heathrow to Kingstown flights

Heathrow to Santo Domingo flights

Stansted to Punta Cana flights

Heathrow to George Town flights

London City to Castries flights

Gatwick to Santo Domingo flights

Gatwick to St. George's flights

Gatwick to Castries flights

London City to Luis Munoz Marin Intl flights

Stansted to Kingston flights

Gatwick to Nassau flights

Gatwick to Port of Spain flights

Gatwick to George Town flights

Gatwick to Havana flights

Heathrow to Basseterre flights

Stansted to Bridgetown flights

Heathrow to Castries flights

Luton to Punta Cana flights

Gatwick to Basseterre flights

London City to Santo Domingo flights

Heathrow to Road Town flights

Gatwick to Kingstown flights

Heathrow to Providenciales flights

London City to St. John's flights

Heathrow to Havana flights

Heathrow to Roseau 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£420	Average£631	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£428	Average£616	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Air Canada	Cheapest£508	Average£613	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Finnair	Cheapest£635	Average£813	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
KLM	Cheapest£674	Average£1,299	FlexibilityNo cancel fee	On-time75%	Search KLM 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 £469

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 17/9. 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 13 June 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 13 June 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 13 June 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 13 June 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, Alaska Airlines and KLM. 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 13 June 2025.