Find flights
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Saint Lucia from £373

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 22/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
13 Feb — 20 Feb1
1 adult
1 adult, Economy, 0 bags

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 14 January 2026.

Round-trip from

£626

One-way from

£373

Popular in

April

Cheapest in

November

Average price

£644
Air Canada
  • Air Canada
  • 24/4-15/5
  • 3 total stops
  • 85h 15m total
  • London to Saint Lucia
Search Deals
22/5
  • 22/5
  • 2 total stops
  • 45h 34m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£190 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 17% potential price decrease (£85 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Find flight deals from Heathrow to Saint Lucia

Enter your travel dates to find the best prices.

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 14 January 2026.

Fri 24/417:15
LHR
-
UVF
2 stops50h 55m
Air Canada
Fri 15/515:15
UVF
-
LHR
1 stop34h 20m
Air Canada
Deal found 12/1£626
Sun 17/509:20
LHR
-
SLU
1 stop14h 40m
Multiple Airlines
Mon 15/616:20
SLU
-
LHR
1 stop12h 00m
Multiple Airlines
Deal found 13/1£627
Wed 25/209:00
LHR
-
UVF
2 stops35h 25m
Air Canada
Wed 4/317:15
UVF
-
LHR
1 stop14h 05m
Air Canada
Deal found 12/1£629
Mon 2/219:25
LHR
-
UVF
2 stops48h 55m
Air Canada
Wed 11/217:15
UVF
-
LHR
1 stop33h 15m
Air Canada
Deal found 12/1£632
Wed 18/318:00
LHR
-
UVF
1 stop25h 25m
Air Canada
Thu 26/316:15
UVF
-
LHR
1 stop34h 15m
Air Canada
Deal found 13/1£634
Sun 15/318:00
LHR
-
UVF
1 stop25h 25m
Air Canada
Wed 25/316:15
UVF
-
LHR
1 stop34h 15m
Air Canada
Deal found 12/1£635
Tue 28/417:15
LHR
-
UVF
2 stops51h 10m
Air Canada
Tue 12/515:15
UVF
-
LHR
2 stops24h 45m
Air Canada
Deal found 12/1£638
Wed 30/917:50
LHR
-
UVF
2 stops49h 25m
Air Canada
Wed 7/1015:10
UVF
-
LHR
1 stop36h 25m
Air Canada
Deal found 12/1£641
Wed 21/113:00
LHR
-
UVF
1 stop31h 25m
Air Canada
Wed 28/117:15
UVF
-
LHR
1 stop14h 05m
Air Canada
Deal found 12/1£642
Thu 9/417:40
LHR
-
UVF
1 stop26h 40m
Air Canada
Thu 23/416:15
UVF
-
LHR
1 stop14h 35m
Air Canada
Deal found 12/1£643
Wed 28/108:00
LHR
-
SLU
1 stop32h 05m
Multiple Airlines
Mon 2/216:20
SLU
-
LHR
1 stop13h 15m
Multiple Airlines
Deal found 12/1£649
Fri 13/309:40
LHR
-
SLU
1 stop13h 20m
Multiple Airlines
Sun 22/312:35
SLU
-
LHR
1 stop12h 50m
Multiple Airlines
Deal found 13/1£655

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Saint Lucia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 14 January 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Saint Lucia that are best for you.

Fly from

Heathrow

Fly to

Saint Lucia

Route

Depart

Return

Price

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 4/2

09:00-16:25

2 stops35h 25m

Castries Hewanorra

Wed 11/2

17:15-08:30

1 stop35h 15m

£673

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 16/3

09:00-15:25

2 stops58h 25m

Castries Hewanorra

Thu 26/3

16:15-11:20

1 stop15h 05m

£682

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 10/3

09:40-18:25

1 stop12h 45m

Castries George F. L. Charle

Tue 24/3

16:20-05:25

1 stop33h 05m

£689

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 24/4

09:20-19:00

1 stop14h 40m

Castries George F. L. Charle

Sat 2/5

15:45-09:20

1 stop12h 35m

£704

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 25/2

08:00-19:00

1 stop15h 00m

Castries George F. L. Charle

Wed 11/3

12:35-05:25

1 stop12h 50m

£705

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sun 8/3

06:50-19:00

2 stops16h 10m

Castries George F. L. Charle

Sun 22/3

12:35-05:25

1 stop12h 50m

£709

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Thu 12/3

17:00-14:58

2 stops25h 58m

Castries Hewanorra

Mon 23/3

15:18-22:10

2 stops26h 52m

£713

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 20/3

19:05-12:01

1 stop20h 56m

Castries Hewanorra

Fri 27/3

15:58-11:30

1 stop15h 32m

£713

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 13/3

09:35-12:01

1 stop30h 26m

Castries Hewanorra

Mon 23/3

15:18-12:00

1 stop16h 42m

£713

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 13/3

09:40-15:15

1 stop33h 35m

Castries George F. L. Charle

Thu 19/3

15:45-09:55

1 stop14h 10m

£713

Flights are sorted by cheapest return flights first.

Deals found on 12/1

Showing 1-10 of 33 results
1
2
3
4

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 £379). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £747). 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.

How often are flights from London to Saint Lucia delayed?

About 18% of weekly flights between London and Saint Lucia have experienced delays in the past year, with the average delay time being 150 minutes.

What is the most punctual flight time for London to Saint Lucia flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Wednesday tends to have the lowest number of delays on this route, whereas Monday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Saint Lucia flights?

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 16% of flights being delayed.

Reviews of airlines servicing Saint Lucia

Get insights into the airlines that provide service to Saint Lucia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Saint Lucia. Reviews last updated 14 January 2026.
Read reviews from past customers who have flown with KLM, Finnair, andVirgin Atlantic 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.
KLM
7.7
Good
1,437 reviews
Check prices

Comfort

7.6

Boarding

7.7

Entertainment

7.1

Crew

8.4

Food

7.2

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,437 reviews
KLM
7.7
Good
1,437 reviews
Check prices

Comfort

7.6

Boarding

7.7

Entertainment

7.1

Crew

8.4

Food

7.2

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Finnair
7.6
Good
1,349 reviews
KLM
7.7
Good
1,437 reviews
Check prices

Comfort

7.6

Boarding

7.7

Entertainment

7.1

Crew

8.4

Food

7.2

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Virgin Atlantic
7.5
Good
678 reviews
KLM
7.7
Good
1,437 reviews
Check prices

Comfort

7.6

Boarding

7.7

Entertainment

7.1

Crew

8.4

Food

7.2

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Air Canada
7.1
Good
10,620 reviews
KLM
7.7
Good
1,437 reviews
Check prices

Comfort

7.6

Boarding

7.7

Entertainment

7.1

Crew

8.4

Food

7.2

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
British Airways
6.7
Okay
7,672 reviews
KLM
7.7
Good
1,437 reviews
Check prices

Comfort

7.6

Boarding

7.7

Entertainment

7.1

Crew

8.4

Food

7.2

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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.

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

    Air Canada and American Airlines can get you from London Heathrow Airport to Saint Lucia in just under 25h 58m. Your travel time can differ by up to 24h 57m. 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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Saint Lucia (average of £379). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £747). 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

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.
Heathrow to Bridgetown flights
Heathrow to Kingston flights
Heathrow to Montego Bay flights
Heathrow to Punta Cana flights
London City to Bridgetown flights
Gatwick to Punta Cana flights
Gatwick to Kingston flights
Gatwick to Bridgetown flights
London City to Kingston flights
Heathrow to St. George's flights
Stansted to Bridgetown flights
London City to Montego Bay flights
London City to Punta Cana flights
Heathrow to Nassau flights
Gatwick to St. John's flights
Heathrow to Port of Spain flights
Heathrow to Castries flights
Stansted to Punta Cana flights
Stansted to Montego Bay flights
Gatwick to Castries flights
Stansted to Kingston flights
Heathrow to St. John's flights
Luton to Punta Cana flights
Gatwick to Montego Bay flights
Heathrow to Luis Munoz Marin Intl flights
Gatwick to Luis Munoz Marin Intl flights
Heathrow to Roseau flights
London City to Castries flights
Heathrow to Castries flights
Luton to Montego Bay flights
Heathrow to Santo Domingo flights
London City to Luis Munoz Marin Intl flights
Gatwick to St. George's flights
Heathrow to Providenciales flights
Gatwick to Santo Domingo flights
London City to St. John's flights
Heathrow to Kingstown flights
Gatwick to Nassau flights
Gatwick to Port of Spain flights
Heathrow to George Town flights
Heathrow to Basseterre flights
Stansted to Luis Munoz Marin Intl flights
Gatwick to Havana flights
Heathrow to Road Town flights
London City to Santo Domingo flights
Stansted to Santo Domingo flights
Heathrow to Simpson Bay flights
Gatwick to Basseterre flights
Heathrow to Puerto Plata flights
Heathrow to Santiago de los Caballeros flights

Top 5 airlines flying from Heathrow to Saint Lucia

Discover the top 5 airlines that operate flights from Heathrow to Saint Lucia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 14 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£371Average£474FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£458Average£673FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£517Average£658FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£663Average£861FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£1,073Average£1,500FlexibilityNo cancel feeOn-time75%
Search KLM flights

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?

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.