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Cheap flights from London Heathrow Airport to Saint Lucia from £413

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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UVF
6 feb — 13 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 7 gennaio 2026.

Round-trip from

£643

One-way from

£413

Popular in

April

Cheapest in

November

Average price

£640
Air Canada
  • Air Canada
  • 2/2-11/2
  • 3 total stops
  • 89h 50m total
  • London to Saint Lucia
Search Deals
JetBlue
  • JetBlue
  • 8/2
  • 1 total stop
  • 36h 08m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£188 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 7 gennaio 2026.

lun 2/213:45LHR - UVF
2 stops54h 35mAir Canada
mer 11/217:15UVF - LHR
1 stop35h 15mAir Canada
Deal found 5/1£643
lun 19/113:45LHR - UVF
2 stops54h 35mAir Canada
gio 29/117:15UVF - LHR
1 stop35h 15mAir Canada
Deal found 5/1£648
mar 3/307:25LHR - UVF
1 stop36h 36mJetBlue
mar 17/315:48UVF - LHR
1 stop25h 52mJetBlue
Deal found 6/1£651
lun 11/509:20LHR - SLU
1 stop14h 40mMultiple Airlines
lun 18/515:45SLU - LHR
1 stop12h 35mMultiple Airlines
Deal found 6/1£653
lun 12/109:00LHR - UVF
2 stops59h 20mAir Canada
lun 26/117:15UVF - LHR
2 stops23h 20mAir Canada
Deal found 5/1£654
mer 21/109:00LHR - UVF
2 stops35h 25mAir Canada
mer 28/117:15UVF - LHR
1 stop14h 05mAir Canada
Deal found 5/1£656
dom 11/113:00LHR - UVF
1 stop31h 25mAir Canada
dom 18/117:15UVF - LHR
1 stop14h 05mAir Canada
Deal found 5/1£658
mer 4/212:20LHR - UVF
1 stop31h 33mJetBlue
mer 11/217:21UVF - LHR
1 stop24h 19mJetBlue
Deal found 5/1£659
mer 4/218:00LHR - UVF
1 stop26h 25mAir Canada
mer 11/217:15UVF - LHR
1 stop35h 15mAir Canada
Deal found 5/1£660
dom 18/109:00LHR - UVF
2 stops35h 25mAir Canada
dom 25/117:15UVF - LHR
1 stop33h 15mAir Canada
Deal found 5/1£661
mer 13/514:10LHR - UVF
2 stops52h 55mAir Canada
mar 19/515:15UVF - LHR
2 stops34h 15mAir Canada
Deal found 6/1£662
lun 2/213:20LHR - SLU
1 stop33h 40mMultiple Airlines
mer 11/212:35SLU - LHR
1 stop12h 50mMultiple Airlines
Deal found 5/1£662

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 7 gennaio 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 - SLU

LHRSLU

London Heathrow

lun 2/2

13:20-19:00

1 stop33h 40m

Castries George F. L. Charle

mer 11/2

12:35-05:25

1 stop12h 50m

£662

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

ven 23/1

09:20-15:20

1 stop34h 00m

Castries Hewanorra

gio 5/2

17:21-20:45

1 stop23h 24m

£665

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

ven 23/1

09:20-15:20

1 stop34h 00m

Castries Hewanorra

ven 30/1

17:21-09:30

1 stop36h 09m

£665

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

mar 3/2

07:25-15:53

1 stop36h 28m

Castries Hewanorra

mar 10/2

17:21-21:40

1 stop24h 19m

£687

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

mer 25/2

08:00-19:00

1 stop15h 00m

Castries George F. L. Charle

mer 11/3

15:45-09:55

1 stop14h 10m

£700

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

gio 26/3

14:45-14:18

1 stop27h 33m

Castries Hewanorra

dom 5/4

14:48-11:05

1 stop15h 17m

£705

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

dom 10/5

09:20-19:00

1 stop14h 40m

Castries George F. L. Charle

dom 24/5

15:45-09:20

1 stop12h 35m

£708

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

lun 26/1

08:05-15:43

1 stop35h 38m

Castries Hewanorra

lun 16/2

17:05-21:40

1 stop24h 35m

£710

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

mer 4/2

11:15-16:02

1 stop32h 47m

Castries Hewanorra

mer 11/2

16:06-12:00

1 stop15h 54m

£713

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

sab 2/5

09:20-19:00

1 stop14h 40m

Castries George F. L. Charle

gio 14/5

15:45-09:20

1 stop12h 35m

£715

Flights are sorted by cheapest return flights first.

Deals found on 5/1

Showing 1-10 of 34 results
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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 £376). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £743). 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 7 gennaio 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
1,434 reviews
Check prices

Crew

8.4

Food

7.2

Boarding

7.8

Entertainment

7.1

Comfort

7.6

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,434 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Crew

8.4

Food

7.2

Boarding

7.8

Entertainment

7.1

Comfort

7.6

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Finnair
7.6
Good
1,345 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Crew

8.4

Food

7.2

Boarding

7.8

Entertainment

7.1

Comfort

7.6

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Virgin Atlantic
7.5
Good
678 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Crew

8.4

Food

7.2

Boarding

7.8

Entertainment

7.1

Comfort

7.6

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Air Canada
7.1
Good
10,598 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Crew

8.4

Food

7.2

Boarding

7.8

Entertainment

7.1

Comfort

7.6

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
British Airways
6.7
Okay
7,657 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Crew

8.4

Food

7.2

Boarding

7.8

Entertainment

7.1

Comfort

7.6

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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?

    JetBlue and British Airways can get you from London Heathrow Airport to Saint Lucia in just under 27h 33m. Your travel time can differ by up to 6h 27m. 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 £376). Flying from London Heathrow Airport to Saint Lucia in December is currently the most expensive (average of £743). 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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Heathrow to Castries flights
London City to St. John's flights
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Heathrow to Kingstown flights
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London City to Castries flights
Heathrow to Roseau flights
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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 7 gennaio 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£369Average£499FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£455Average£676FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£514Average£661FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£638Average£817FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£1,068Average£1,492FlexibilityNo 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.

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