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Cheap flights from London to Saint Lucia from £338

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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — UVF
16 Sep — 23 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Saint Lucia

Enter your travel dates to find the best prices.

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 17 August 2026.

Mon 28/911:15 -
Nonstop8h 45m
Mon 5/1022:05 -
Nonstop8h 20m
Deal found 14/8£542
Thu 17/911:15 -
Nonstop8h 45m
Mon 28/922:00 -
Nonstop8h 25m
Deal found 12/8£547
Mon 9/1112:15 -
Nonstop9h 05m
Mon 16/1119:05 -
Nonstop8h 15m
Deal found 15/8£548
Sun 6/911:15 -
Nonstop8h 45m
Tue 3/1119:20 -
Nonstop8h 15m
Deal found 13/8£549
Thu 24/911:15 -
Nonstop8h 45m
Mon 12/1022:05 -
Nonstop8h 20m
Deal found 13/8£550
Sun 20/911:15 -
Nonstop8h 45m
Mon 28/922:00 -
Nonstop8h 25m
Deal found 14/8£551
Tue 1/1212:30 -
Nonstop9h 05m
Tue 8/1219:20 -
Nonstop8h 15m
Deal found 15/8£553
Sun 4/1011:15 -
Nonstop8h 50m
Mon 12/1022:05 -
Nonstop8h 20m
Deal found 16/8£557
Thu 24/911:15 -
Nonstop8h 45m
Mon 28/922:00 -
Nonstop8h 25m
Deal found 14/8£558
Mon 14/911:15 -
Nonstop8h 45m
Sun 20/920:25 -
Nonstop8h 25m
Deal found 13/8£559
Fri 18/908:15 -
1 stop35h 49m
Mon 28/916:39 -
1 stop23h 06m
Deal found 13/8£618
Mon 14/908:15 -
1 stop36h 18m
Sun 20/916:39 -
1 stop23h 06m
Deal found 13/8£642

Find 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 17 August 2026.

Round-trip from

£542

One-way from

£338

Good round-trip deal

£570 or less

Good one-way deal

£595 or less
British Airways
  • British Airways
  • 28/9-5/10
  • Nonstop
  • 17h 05m total
  • London to Saint Lucia
Search Deals
11/9
  • 11/9
  • 3 total stops
  • 44h 40m total
  • London to Saint Lucia
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

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 17 August 2026.
Use the filters below to find and compare flights from London to Saint Lucia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

LondonCastries

LGW London Gatwick - UVF Castries Hewanorra

LGWUVF

London Gatwick

Thu 1/10

11:15-15:05

Nonstop8h 50m

Castries Hewanorra

Thu 8/10

22:05-11:25

Nonstop8h 20m

£580

LondonCastries

LGW London Gatwick - UVF Castries Hewanorra

LGWUVF

London Gatwick

Fri 4/12

13:15-18:20

Nonstop9h 05m

Castries Hewanorra

Sat 12/12

19:20-07:35

Nonstop8h 15m

£595

LondonCastries

LGW London Gatwick - SLU Castries George F. L. Charle

LGWSLU

London Gatwick

Fri 22/1

10:05-19:00

1 stop12h 55m

Castries George F. L. Charle

Fri 29/1

15:45-09:20

1 stop13h 35m

£683

LondonCastries

LHR London Heathrow - UVF Castries Hewanorra

LHRUVF

London Heathrow

Thu 1/10

16:25-14:02

2 stops26h 37m

Castries Hewanorra

Tue 6/10

14:42-12:35

1 stop16h 53m

£690

LondonCastries

LGW London Gatwick - SLU Castries George F. L. Charle

LGWSLU

London Gatwick

Sun 8/11

10:05-19:00

1 stop12h 55m

Castries George F. L. Charle

Fri 20/11

15:45-09:20

1 stop13h 35m

£694

LondonCastries

LGW London Gatwick - SLU Castries George F. L. Charle

LGWSLU

London Gatwick

Wed 20/1

10:05-19:00

1 stop12h 55m

Castries George F. L. Charle

Thu 28/1

15:45-10:25

1 stop14h 40m

£695

LondonCastries

LGW London Gatwick - SLU Castries George F. L. Charle

LGWSLU

London Gatwick

Thu 21/1

10:05-19:00

1 stop12h 55m

Castries George F. L. Charle

Thu 18/2

15:45-10:25

1 stop14h 40m

£695

LondonCastries

LGW London Gatwick - SLU Castries George F. L. Charle

LGWSLU

London Gatwick

Fri 4/12

10:05-19:00

1 stop12h 55m

Castries George F. L. Charle

Mon 7/12

15:45-10:25

1 stop14h 40m

£704

LondonCastries

LHR London Heathrow - SLU Castries George F. L. Charle

LHRSLU

London Heathrow

Sun 13/9

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Sun 20/9

12:35-06:15

1 stop12h 40m

£715

LondonCastries

LHR London Heathrow - SLU Castries George F. L. Charle

LHRSLU

London Heathrow

Wed 20/1

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Thu 28/1

12:35-05:50

1 stop13h 15m

£724

Flights are sorted by cheapest return flights first.

Deals found on 17/8

Showing 1-10 of 60 resultsSorted by cheapest first
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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, September is the cheapest month in which you can book a flight from London to Saint Lucia (average of £553). Flying from London to Saint Lucia in December is currently the most expensive (average of £978). 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 17 August 2026.

When flying from London to Saint Lucia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How often are flights from London to Saint Lucia delayed?

About 23% of weekly flights between London and Saint Lucia have experienced delays in the past year, with the average delay time being 125 minutes.

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

Historically, flights departing in the morning 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?

Thursday 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, British Airways have had the lowest number of delays on this route, with just 23% of flights being delayed.

How far ahead should I book a flight from London to Saint Lucia?

Booking 47 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Saint Lucia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 17 August 2026.
Read through reviews of airlines operating flights from London to Saint Lucia, such as Finnair,American Airlines, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,426 reviews
Check prices

Comfort

7.5

Food

6.7

Overall

7.6

Entertainment

6.9

Boarding

7.7

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

LAX - HEL

All crew members are really nice behavior. Devdutt also nice person.
Finnair
7.6
Good
1,426 reviews
Finnair
7.6
Good
1,426 reviews
Check prices

Comfort

7.5

Food

6.7

Overall

7.6

Entertainment

6.9

Boarding

7.7

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

LAX - HEL

All crew members are really nice behavior. Devdutt also nice person.
American Airlines
7.1
Good
11,951 reviews
Finnair
7.6
Good
1,426 reviews
Check prices

Comfort

7.5

Food

6.7

Overall

7.6

Entertainment

6.9

Boarding

7.7

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

LAX - HEL

All crew members are really nice behavior. Devdutt also nice person.
Air Canada
7.1
Good
11,482 reviews
Finnair
7.6
Good
1,426 reviews
Check prices

Comfort

7.5

Food

6.7

Overall

7.6

Entertainment

6.9

Boarding

7.7

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

LAX - HEL

All crew members are really nice behavior. Devdutt also nice person.
JetBlue
7.1
Good
3,031 reviews
Finnair
7.6
Good
1,426 reviews
Check prices

Comfort

7.5

Food

6.7

Overall

7.6

Entertainment

6.9

Boarding

7.7

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

LAX - HEL

All crew members are really nice behavior. Devdutt also nice person.
British Airways
6.7
Okay
8,169 reviews
Finnair
7.6
Good
1,426 reviews
Check prices

Comfort

7.5

Food

6.7

Overall

7.6

Entertainment

6.9

Boarding

7.7

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

LAX - HEL

All crew members are really nice behavior. Devdutt also nice person.

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 £580, 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, September is the cheapest month in which you can book a flight from London to Saint Lucia (average of £553). Flying from London to Saint Lucia in December is currently the most expensive (average of £978). 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
Gatwick to Bridgetown flights
Heathrow to Kingston flights
Stansted to Bridgetown flights
Gatwick to Punta Cana flights
Heathrow to Punta Cana flights
Manchester to Bridgetown flights
London City to Montego Bay flights
Stansted to Montego Bay flights
London City to Bridgetown flights
Gatwick to Montego Bay flights
London City to Kingston flights
Stansted to Punta Cana flights
Heathrow to Nassau flights
Stansted to Kingston flights
Gatwick to Kingston flights
Heathrow to Santo Domingo flights
Heathrow to Port of Spain flights
Heathrow to Castries flights
Luton to Punta Cana flights
Heathrow to Luis Munoz Marin Intl flights
Gatwick to Port of Spain flights
Gatwick to Castries flights
Luton to Montego Bay flights
Gatwick to St. John's flights
Gatwick to Santo Domingo flights
Heathrow to St. John's flights
London City to Punta Cana flights
Heathrow to Kingstown flights
Heathrow to Basseterre flights
Gatwick to Luis Munoz Marin Intl flights
Gatwick to Basseterre flights
Stansted to Santo Domingo flights
London City to Castries flights
Stansted to Port of Spain flights
Heathrow to St. George's flights
London City to Luis Munoz Marin Intl flights
Heathrow to George Town flights
Gatwick to Havana flights
Stansted to Luis Munoz Marin Intl flights
Gatwick to Nassau flights
Manchester to Montego Bay flights
London City to Santo Domingo flights
Heathrow to Castries flights
Heathrow to Willemstad flights
Gatwick to Willemstad flights
Gatwick to Castries flights
Gatwick to St. George's flights

Top 3 airlines flying from London to Saint Lucia

Discover the top 3 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 17 August 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£497Average£733FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£566Average£874FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapest£654Average£738FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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