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Cheap flights from London Heathrow Airport to Saint Lucia from £336

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 15/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
30 Mar — 6 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap 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 28 February 2026.

Tue 3/308:00
LHR
-
SLU
1 stop14h 25m
Multiple Airlines
Tue 17/316:20
SLU
-
LHR
1 stop13h 15m
Multiple Airlines
Deal found 25/2£665
Wed 1/408:30
LHR
-
UVF
1 stop35h 55m
Air Canada
Wed 15/416:20
UVF
-
LHR
2 stops23h 40m
Air Canada
Deal found 25/2£675
Wed 1/408:30
LHR
-
UVF
1 stop35h 55m
Air Canada
Wed 8/416:20
UVF
-
LHR
1 stop35h 15m
Air Canada
Deal found 28/2£677
Thu 9/417:40
LHR
-
UVF
1 stop26h 40m
Air Canada
Thu 16/416:15
UVF
-
LHR
1 stop35h 20m
Air Canada
Deal found 25/2£679
Wed 25/319:05
LHR
-
UVF
2 stops23h 13m
American Airlines
Tue 7/415:13
UVF
-
LHR
1 stop16h 37m
American Airlines
Deal found 25/2£683
Mon 30/320:10
LHR
-
UVF
2 stops22h 38m
American Airlines
Tue 7/415:13
UVF
-
LHR
2 stops34h 57m
American Airlines
Deal found 24/2£684
Tue 7/417:40
LHR
-
UVF
1 stop26h 40m
Air Canada
Sun 12/416:05
UVF
-
LHR
1 stop33h 30m
Air Canada
Deal found 24/2£685
Wed 25/319:10
LHR
-
UVF
2 stops23h 48m
American Airlines
Wed 8/414:45
UVF
-
LHR
2 stops36h 00m
American Airlines
Deal found 25/2£687
Thu 26/1106:00
LHR
-
UVF
2 stops38h 25m
Air Canada
Wed 9/1217:25
UVF
-
LHR
2 stops23h 10m
Air Canada
Deal found 27/2£688
Sat 28/1106:00
LHR
-
UVF
2 stops38h 25m
Air Canada
Wed 9/1217:25
UVF
-
LHR
2 stops23h 10m
Air Canada
Deal found 27/2£689
Wed 15/417:40
LHR
-
UVF
1 stop26h 45m
Air Canada
Fri 15/515:15
UVF
-
LHR
1 stop34h 20m
Air Canada
Deal found 26/2£691
Fri 20/1113:25
LHR
-
UVF
2 stops55h 00m
Air Canada
Fri 4/1217:25
UVF
-
LHR
1 stop33h 05m
Air Canada
Deal found 26/2£694

Find 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 28 February 2026.

Round-trip from

£675

One-way from

£336

Popular in

April

Cheapest in

November

Average price

£682
Air Canada
  • Air Canada
  • 1/4-15/4
  • 3 total stops
  • 59h 35m total
  • London to Saint Lucia
Search Deals
15/4
  • 15/4
  • 2 total stops
  • 29h 41m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 45% potential increase in price (£522 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 15% potential price decrease (£87 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 28 February 2026.
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

Tue 14/4

16:20-14:02

2 stops26h 42m

Castries Hewanorra

Tue 21/4

15:22-20:10

2 stops23h 48m

£735

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 6/4

09:40-13:58

2 stops33h 18m

Castries Hewanorra

Fri 24/4

15:22-13:15

1 stop16h 53m

£737

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 29/4

12:00-14:26

1 stop31h 26m

Castries Hewanorra

Thu 7/5

14:45-19:45

2 stops24h 00m

£803

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 24/3

20:25-12:40

2 stops44h 15m

Castries George F. L. Charle

Sun 5/4

05:00-10:45

2 stops24h 45m

£852

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Sun 26/4

18:05-14:26

2 stops25h 21m

Castries Hewanorra

Mon 11/5

14:45-19:45

2 stops24h 00m

£858

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 1/5

17:35-13:09

2 stops24h 34m

Castries Hewanorra

Sun 10/5

14:45-12:35

1 stop16h 50m

£887

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 7/3

06:30-22:10

3 stops19h 40m

Castries George F. L. Charle

Sat 14/3

12:35-20:50

3 stops28h 15m

£938

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 27/4

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Wed 6/5

12:35-06:15

1 stop12h 40m

£1,035

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 30/4

20:05-14:35

2 stops23h 30m

Castries George F. L. Charle

Wed 6/5

10:15-20:10

2 stops28h 55m

£1,068

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 8/5

19:50-22:10

3 stops31h 20m

Castries George F. L. Charle

Fri 15/5

18:00-20:10

2 stops21h 10m

£1,079

Flights are sorted by cheapest return flights first.

Deals found on 24/2

Showing 1-10 of 28 resultsSorted by cheapest first
1
2
3

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 £378). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £788). 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 9% of weekly flights between London and Saint Lucia have experienced delays in the past year, with the average delay time being 132 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 Sunday 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 9% 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 28 February 2026.
Read reviews from past customers who have flown with KLM, Finnair, andAir Canada 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
1,461 reviews
Check prices

Comfort

7.6

Boarding

7.8

Entertainment

7.1

Crew

8.4

Overall

7.7

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,461 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Comfort

7.6

Boarding

7.8

Entertainment

7.1

Crew

8.4

Overall

7.7

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Finnair
7.6
Good
1,371 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Comfort

7.6

Boarding

7.8

Entertainment

7.1

Crew

8.4

Overall

7.7

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Air Canada
7.1
Good
10,760 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Comfort

7.6

Boarding

7.8

Entertainment

7.1

Crew

8.4

Overall

7.7

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6.7
Okay
7,772 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Comfort

7.6

Boarding

7.8

Entertainment

7.1

Crew

8.4

Overall

7.7

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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?

    Delta can get you from London Heathrow Airport to Saint Lucia in just under 26h 42m. Your travel time can differ by up to . The distance between London Heathrow Airport and Saint Lucia is about 4217 mi.

  • 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 £378). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £788). 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

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Heathrow to Saint Lucia

Discover the top 4 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 28 February 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£472Average£816FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£531Average£704FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£671Average£860FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£1,069Average£1,479FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

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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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