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Cheap flights from London to Saint Lucia from £347

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 21/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — UVF
12 Oct — 19 Oct1
1 adult
1 adult, Economy

Cheap flight deals from London to Saint Lucia

Keep the following information in mind while searching for London to Saint Lucia flight deals. Data was last updated 12 September 2025.

Round-trip from

£517

One-way from

£347

Popular in

December

Cheapest in

September

Average price

£475

Good round-trip deal

£545 or less

Good one-way deal

£473 or less
British Airways
  • British Airways
  • 2/10-15/10
  • Nonstop
  • 17h 10m total
  • London to Saint Lucia
Search Deals
21/9
  • 21/9
  • 2 total stops
  • 34h 50m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£58 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£26 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals
Price to beat on a round-trip flight from London (LON) to Saint Lucia.
Search Deals
Price to beat on a one-way flight from London (LON) to Saint Lucia.
Search Deals

Find flight deals from London to Saint Lucia

Cheapest flights from London to Saint Lucia
Explore the most affordable flight options available from London to Saint Lucia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Thu 2/1011:15LGW - UVF
Nonstop8h 50mBritish Airways
Wed 15/1020:25UVF - LGW
Nonstop8h 20mBritish Airways
Deal found 11/9£517
Wed 1/1011:15LGW - UVF
Nonstop8h 45mBritish Airways
Wed 8/1020:25UVF - LGW
Nonstop8h 20mBritish Airways
Deal found 10/9£518
Fri 26/911:15LGW - UVF
Nonstop8h 45mBritish Airways
Fri 10/1020:45UVF - LGW
Nonstop8h 20mBritish Airways
Deal found 10/9£550
Fri 31/1010:00LGW - UVF
Nonstop9h 05mBritish Airways
Thu 13/1122:05UVF - LGW
Nonstop8h 15mBritish Airways
Deal found 10/9£560
Mon 10/1108:05LHR - UVF
1 stop34h 52mJetBlue
Mon 24/1117:01UVF - LHR
1 stop24h 39mJetBlue
Deal found 10/9£579
Mon 10/1110:00LGW - UVF
Nonstop9h 05mBritish Airways
Mon 24/1122:05UVF - LGW
Nonstop8h 15mBritish Airways
Deal found 10/9£579
Fri 10/1011:15LGW - UVF
Nonstop8h 45mBritish Airways
Fri 17/1020:45UVF - LGW
Nonstop8h 20mBritish Airways
Deal found 10/9£581
Sat 11/1011:15LGW - UVF
Nonstop8h 45mBritish Airways
Wed 22/1020:25UVF - LGW
Nonstop8h 20mBritish Airways
Deal found 9/9£582
Mon 10/1108:05LHR - UVF
1 stop34h 52mIcelandair
Mon 24/1117:01UVF - LHR
1 stop24h 39mIcelandair
Deal found 10/9£587
Mon 22/911:15LGW - UVF
Nonstop8h 50mBritish Airways
Fri 26/920:45UVF - LGW
Nonstop8h 20mBritish Airways
Deal found 10/9£605
Thu 9/1008:15LHR - UVF
1 stop34h 59mJetBlue
Thu 16/1015:34UVF - LHR
1 stop24h 11mJetBlue
Deal found 11/9£644
Thu 25/908:05LHR - SLU
1 stop11h 30mMultiple Airlines
Thu 9/1015:20SLU - LHR
1 stop11h 30mMultiple Airlines
Deal found 10/9£674

Cheapflights Fare Finder

 
Customise your flight search to find flights from London 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 12 September 2025.
Use the filters below to find and compare flights from London to Saint Lucia that are best for you.

Fly from

London

Fly to

Saint Lucia

Route

Depart

Return

Price

LondonCastries

LGW - UVF

LGWUVF

London Gatwick

Thu 2/10

11:15-15:05

Nonstop8h 50m

Castries Hewanorra

Wed 15/10

20:25-09:45

Nonstop8h 20m

£517

LondonCastries

LGW - UVF

LGWUVF

London Gatwick

Wed 1/10

11:15-15:00

Nonstop8h 45m

Castries Hewanorra

Wed 8/10

20:25-09:45

Nonstop8h 20m

£533

LondonCastries

LGW - UVF

LGWUVF

London Gatwick

Fri 31/10

10:00-15:05

Nonstop9h 05m

Castries Hewanorra

Thu 13/11

22:05-10:20

Nonstop8h 15m

£560

LondonCastries

LGW - UVF

LGWUVF

London Gatwick

Wed 14/1

10:05-15:10

Nonstop9h 05m

Castries Hewanorra

Sun 1/3

20:35-08:50

Nonstop8h 15m

£616

LondonCastries

LGW - UVF

LGWUVF

London Gatwick

Wed 14/1

10:05-15:10

Nonstop9h 05m

Castries Hewanorra

Wed 25/2

20:35-08:50

Nonstop8h 15m

£616

LondonCastries

LGW - UVF

LGWUVF

London Gatwick

Sat 17/1

10:05-15:10

Nonstop9h 05m

Castries Hewanorra

Sun 1/3

20:35-08:50

Nonstop8h 15m

£625

LondonCastries

LGW - UVF

LGWUVF

London Gatwick

Tue 13/1

10:00-15:05

Nonstop9h 05m

Castries Hewanorra

Fri 27/2

20:50-09:05

Nonstop8h 15m

£641

LondonCastries

LGW - UVF

LGWUVF

London Gatwick

Wed 14/1

10:05-15:10

Nonstop9h 05m

Castries Hewanorra

Sat 28/2

20:35-08:50

Nonstop8h 15m

£641

LondonCastries

LGW - UVF

LGWUVF

London Gatwick

Wed 14/1

10:05-15:10

Nonstop9h 05m

Castries Hewanorra

Fri 27/2

20:50-09:05

Nonstop8h 15m

£641

LondonCastries

LGW - UVF

LGWUVF

London Gatwick

Fri 16/1

10:00-15:05

Nonstop9h 05m

Castries Hewanorra

Sun 1/3

20:35-08:50

Nonstop8h 15m

£641

Flights are sorted by cheapest return flights first.

Deals found on 10/9

Showing 1-10 of 55 results
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Best time to book a flight from London to Saint Lucia

Have a flexible travel schedule? Discover the best time to fly to Saint Lucia from London 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 to Saint Lucia

What is the cheapest month to book a flight from London to Saint Lucia?

Currently, March is the cheapest month in which you can book a flight from London to Saint Lucia (average of £328). Flying from London 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 LON to LC?

Find hourly flight availability from London 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 12 September 2025.

A simple way to save on the total cost of your ticket is to fly from London to Saint Lucia in the morning. If you’re flexible enough to do this you can expect to save up to 5% on your trip compared to booking a flight at midday.

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 12 September 2025.
Read through reviews of airlines operating flights from London to Saint Lucia, such as Finnair, Virgin Atlantic, andIcelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,323 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Boarding

7.6

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
Finnair
7.6
Good
1,323 reviews
Finnair
7.6
Good
1,323 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Boarding

7.6

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
Virgin Atlantic
7.4
Good
664 reviews
Finnair
7.6
Good
1,323 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Boarding

7.6

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
Icelandair
7.0
Good
546 reviews
Finnair
7.6
Good
1,323 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Boarding

7.6

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
British Airways
6.7
Okay
7,361 reviews
Finnair
7.6
Good
1,323 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Overall

7.6

Food

6.7

Crew

8.1

Boarding

7.6

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(

Related info for your journey

Find useful and relevant information for your journey from London 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 to Saint Lucia?

    For as low as £517, British Airways can have you in Saint Lucia from London in 8h 50m. The distance between London and Saint Lucia is about 4223 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most popular routes from London to Saint Lucia?

    The most popular route from London to Saint Lucia is London Heathrow - Castries Hewanorra. You may also consider London Gatwick - Castries Hewanorra or London City - Castries Hewanorra.

  • Can I find deals for flights from London to Saint Lucia that include hotel bookings?

    Yes. In addition to deals on London to Saint Lucia flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Saint Lucia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Saint Lucia.

  • Can I find deals for business class flights from London to Saint Lucia?

    Yes. Cheapflights offers flight deals from London 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 to Saint Lucia?

    Currently, March is the cheapest month in which you can book a flight from London to Saint Lucia (average of £328). Flying from London 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

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Alternative routes for London to Saint Lucia

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Bridgetown flights
Heathrow to Montego Bay flights
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London City to Luis Munoz Marin Intl flights
Heathrow to George Town flights
London City to Castries flights
Stansted to Punta Cana flights
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Birmingham to Montego Bay flights
Heathrow to Road Town flights
Heathrow to Castries flights
Gatwick to Kingstown flights
Heathrow to Oranjestad flights
Gatwick to Havana flights
Luton to Punta Cana flights
Heathrow to Santiago de los Caballeros flights
Heathrow to Simpson Bay flights
Heathrow to Scarborough flights
London City to Santo Domingo flights
Gatwick to Nassau flights
Manchester to Montego Bay flights
Birmingham to Bridgetown flights
London City to St. George's flights
Stansted to Luis Munoz Marin Intl flights
Stansted to Montego Bay flights

Top 6 airlines flying from London to Saint Lucia

Discover the top 6 airlines that operate flights from London 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 12 September 2025.
AirlineCheapestAverageFlexibilityOn-time
TUI AirwaysCheapest£280Average£385FlexibilityNo cancel feeOn-timeN/A
Search TUI Airways flights
British AirwaysCheapest£403Average£591FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£414Average£597FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air CanadaCheapest£514Average£638FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£582Average£799FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£676Average£1,309FlexibilityNo 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 London to Saint Lucia?

Cheapflights helps you search for flights from London to Saint Lucia via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from London to Saint Lucia?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Saint Lucia from London.

Can Cheapflights find flights from London to Saint Lucia with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from London to Saint Lucia, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from London to Saint Lucia become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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