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Cheap flights from London to Saint Lucia from £397

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 18/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — UVF
18 Jun — 25 Jun1
1 adult

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 13 June 2025.

Round-trip from

£562

One-way from

£397

Popular in

December

Cheapest in

September

Average price

£506

Good round-trip deal

£574 or less

Good one-way deal

£421 or less
Air Canada
  • Air Canada
  • 3/11-10/11
  • 2 total stops
  • 61h 25m total
  • London to Saint Lucia
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British Airways
  • British Airways
  • 18/9
  • Nonstop
  • 8h 50m total
  • London to Saint Lucia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£57 potential increase over avg. return price).
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Cheapest flight prices on average. 6% potential price decrease (£25 potential savings vs. average return price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from London (LON) to Saint Lucia.
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Price to beat on a one-way flight from London (LON) to Saint Lucia.
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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 13 June 2025.

Mon 3/1118:00LHR - UVF
1 stop26h 00mAir Canada
Mon 10/1117:05UVF - LHR
1 stop35h 25mAir Canada
Deal found 11/6£562
Fri 5/912:10LGW - UVF
2 stops54h 50mIcelandair
Fri 12/915:06UVF - LGW
2 stops37h 29mIcelandair
Deal found 11/6£574
Wed 18/611:15LGW - UVF
Nonstop8h 45mBritish Airways
Wed 25/620:25UVF - LGW
Nonstop8h 20mBritish Airways
Deal found 11/6£596
Thu 4/908:05LHR - SLU
1 stop11h 30mMultiple Airlines
Thu 11/915:20SLU - LHR
1 stop11h 30mMultiple Airlines
Deal found 11/6£625
Fri 5/911:15LGW - UVF
Nonstop8h 45mMultiple Airlines
Fri 12/916:00UVF - LGW
2 stops56h 00mMultiple Airlines
Deal found 11/6£628
Mon 10/1108:25LHR - UVF
2 stops35h 09mIcelandair
Mon 24/1116:54UVF - LHR
1 stop23h 51mIcelandair
Deal found 12/6£628
Wed 1/1015:15LHR - UVF
1 stop28h 08mMultiple Airlines
Wed 8/1015:32UVF - LHR
1 stop34h 43mMultiple Airlines
Deal found 13/6£691
Fri 31/1012:15LHR - UVF
2 stops30h 02mDelta
Thu 13/1116:35UVF - LHR
1 stop33h 50mDelta
Deal found 11/6£703
Wed 5/1113:00LGW - SLU
3 stops50h 30mMultiple Airlines
Sat 15/1118:20SLU - LGW
2 stops31h 40mMultiple Airlines
Deal found 12/6£703
Mon 8/909:55LHR - UVF
1 stop33h 22mAmerican Airlines
Mon 22/915:17UVF - LHR
1 stop14h 18mAmerican Airlines
Deal found 11/6£706
Tue 26/809:20LHR - UVF
1 stop33h 55mAlaska Airlines
Thu 4/915:35UVF - LHR
1 stop16h 55mAlaska Airlines
Deal found 13/6£717
Sat 13/1212:30LGW - UVF
2 stops28h 30mAmerican Airlines
Tue 23/1216:55UVF - LGW
2 stops34h 35mAmerican Airlines
Deal found 12/6£778

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 13 June 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

LHR - UVF

LHRUVF

London Heathrow

Mon 3/11

18:00-16:00

1 stop26h 00m

Castries Hewanorra

Mon 10/11

17:05-08:30

1 stop35h 25m

£562

LondonCastries

LGW - UVF

LGWUVF

London Gatwick

Fri 5/9

12:10-14:00

2 stops54h 50m

Castries Hewanorra

Fri 12/9

15:06-09:35

2 stops37h 29m

£574

LondonCastries

LGW - UVF

LGWUVF

London Gatwick

Wed 27/8

11:15-15:00

Nonstop8h 45m

Castries Hewanorra

Sun 7/9

20:25-09:45

Nonstop8h 20m

£597

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 4/9

08:05-14:35

1 stop11h 30m

Castries George F. L. Charle

Thu 11/9

15:20-07:50

1 stop11h 30m

£625

LondonCastries

LGW - UVF

LGWUVF

London Gatwick

Fri 5/9

11:15-15:00

Nonstop8h 45m

Castries Hewanorra

Fri 12/9

16:00-05:00

2 stops56h 00m

£628

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 10/11

08:25-15:34

2 stops35h 09m

Castries Hewanorra

Mon 24/11

16:54-20:45

1 stop23h 51m

£628

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Wed 1/10

15:15-14:23

1 stop28h 08m

Castries Hewanorra

Wed 8/10

15:32-07:15

1 stop34h 43m

£691

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Fri 31/10

08:50-14:17

2 stops33h 27m

Castries Hewanorra

Wed 12/11

16:35-20:10

2 stops23h 35m

£703

LondonCastries

LGW - SLU

LGWSLU

London Gatwick

Wed 5/11

13:00-11:30

3 stops50h 30m

Castries George F. L. Charle

Sat 15/11

18:20-06:00

2 stops31h 40m

£703

LondonCastries

LHR - UVF

LHRUVF

London Heathrow

Mon 8/9

09:55-14:17

1 stop33h 22m

Castries Hewanorra

Mon 22/9

15:17-10:35

1 stop14h 18m

£706

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 42 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 13 June 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 20% on your trip compared to booking a flight at midday.

What is the cheapest day to fly from London to Saint Lucia?

Use this chart to determine the cheapest time to fly return from London to Saint Lucia. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London to Saint Lucia flight should consider departing on Tuesday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 13 June 2025.
Peruse reviews from past customers who have flown with Delta, Alaska Airlines and KLM from London to Saint Lucia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,950 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very Good
7,950 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Alaska Airlines
8.0
Very Good
10,000 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • What are the cheapest airlines to fly from London to Saint Lucia one-way?

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £397. Air Canada flights start at £469 while deals on WestJet start at £511 one-way.

  • 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 Montego Bay flights
Heathrow to Bridgetown flights
Gatwick to Montego Bay flights
Heathrow to Kingston flights
Gatwick to Kingston flights
Gatwick to Bridgetown flights
Gatwick to Punta Cana flights
Heathrow to Castries flights
Heathrow to Punta Cana flights
London City to Montego Bay flights
Gatwick to Castries flights
Heathrow to Luis Munoz Marin Intl flights
Heathrow to St. John's flights
London City to Kingston flights
Heathrow to St. George's flights
Luton to Montego Bay flights
Gatwick to St. John's flights
Heathrow to Port of Spain flights
Heathrow to Nassau flights
Gatwick to Luis Munoz Marin Intl flights
London City to Bridgetown flights
London City to Punta Cana flights
Stansted to Montego Bay flights
Heathrow to Kingstown flights
Heathrow to Santo Domingo flights
Manchester to Montego Bay flights
Stansted to Punta Cana flights
Heathrow to George Town flights
Manchester to Bridgetown flights
London City to Castries flights
Gatwick to Santo Domingo flights
Gatwick to St. George's flights
Manchester to Punta Cana flights
Gatwick to Castries flights
London City to Luis Munoz Marin Intl flights
Stansted to Kingston flights
Gatwick to Nassau flights
Gatwick to Port of Spain flights
Gatwick to George Town flights
Gatwick to Havana flights
Heathrow to Basseterre flights
Stansted to Bridgetown flights
Heathrow to Castries flights
Luton to Punta Cana flights
Birmingham to Montego Bay flights
Gatwick to Basseterre flights
London City to Santo Domingo flights
Heathrow to Road Town flights
Edinburgh to Bridgetown flights
Gatwick to Kingstown 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 13 June 2025.
AirlineCheapestAverageFlexibilityOn-time
TUI AirwaysCheapest£279Average£378FlexibilityNo cancel feeOn-timeN/A
Search TUI Airways flights
British AirwaysCheapest£411Average£618FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£428Average£616FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapest£502Average£796FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Air CanadaCheapest£508Average£613FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
KLMCheapest£674Average£1,299FlexibilityNo 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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