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Cheap flights from London to Castries from £427

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 25/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SLU
15 Apr — 22 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Castries

Enter your travel dates to find the best prices.

Cheapest flights from London to Castries
Explore the most affordable flight options available from London to Castries. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 March 2026.

Fri 13/1113:25
LHR
-
SLU
1 stop26h 40m
Multiple Airlines
Fri 27/1115:45
SLU
-
LHR
1 stop12h 45m
Multiple Airlines
Deal found 13/3£793
Mon 16/1110:35
LHR
-
SLU
1 stop12h 25m
Multiple Airlines
Sun 29/1115:45
SLU
-
LHR
1 stop12h 45m
Multiple Airlines
Deal found 12/3£809
Mon 22/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Wed 1/712:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 12/3£810
Sun 8/1113:20
LHR
-
SLU
1 stop26h 45m
Multiple Airlines
Sun 29/1115:45
SLU
-
LHR
1 stop12h 45m
Multiple Airlines
Deal found 11/3£840
Sun 1/1109:40
LHR
-
SLU
1 stop13h 20m
Multiple Airlines
Sun 29/1112:35
SLU
-
LHR
1 stop17h 20m
Multiple Airlines
Deal found 15/3£845
Tue 17/309:40
LHR
-
SLU
1 stop12h 45m
Multiple Airlines
Thu 19/312:35
SLU
-
LHR
1 stop17h 00m
Multiple Airlines
Deal found 11/3£856
Wed 10/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Thu 11/612:35
SLU
-
LHR
1 stop12h 15m
Multiple Airlines
Deal found 11/3£860
Fri 2/1011:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Fri 9/1012:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 12/3£862
Mon 1/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Tue 30/612:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 14/3£866
Sun 22/313:20
LHR
-
SLU
1 stop29h 55m
Multiple Airlines
Thu 26/312:35
SLU
-
LHR
1 stop13h 15m
Multiple Airlines
Deal found 11/3£911
Tue 15/910:05
LGW
-
SLU
2 stops37h 55m
Multiple Airlines
Fri 25/915:45
SLU
-
LGW
2 stops35h 05m
Multiple Airlines
Deal found 12/3£928
Tue 23/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Sat 27/612:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 15/3£935

Find flight deals from London to Castries

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Castries (SLU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 16 March 2026.

Round-trip from

£810

One-way from

£427

Popular in

April

Cheapest in

November

Good round-trip deal

£660 or less

Good one-way deal

£513 or less
22/6-1/7
  • 22/6-1/7
  • 2 total stops
  • 25h 30m total
  • London to Castries
Search Deals
25/4
  • 25/4
  • 3 total stops
  • 39h 10m total
  • London to Castries
Search Deals
Highest demand for flights based on searches. 39% potential increase in price (£412 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 17% potential price decrease (£93 potential savings vs. average return price).
Search Deals
Price to beat on a round-trip flight from London (LON) to Castries George F. L. Charle.
Search Deals
Price to beat on a one-way flight from London (LON) to Castries George F. L. Charle.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Castries 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 16 March 2026.
Use the filters below to find and compare flights from London to Castries that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 5/9

09:35-19:00

1 stop14h 25m

Castries George F. L. Charle

Sun 6/9

12:35-09:20

1 stop15h 45m

£976

LondonCastries

LGW - SLU

LGWSLU

London Gatwick

Wed 6/5

11:35-13:10

3 stops30h 35m

Castries George F. L. Charle

Sat 9/5

17:50-10:45

2 stops35h 55m

£1,023

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 6/5

11:20-13:10

2 stops30h 50m

Castries George F. L. Charle

Sat 9/5

17:50-10:00

3 stops35h 10m

£1,126

LondonCastries

LGW - SLU

LGWSLU

London Gatwick

Sun 31/5

09:40-15:35

3 stops34h 55m

Castries George F. L. Charle

Sun 14/6

05:00-10:45

2 stops24h 45m

£1,181

LondonCastries

LGW - SLU

LGWSLU

London Gatwick

Sat 28/3

20:15-17:15

2 stops25h 00m

Castries George F. L. Charle

Wed 1/4

15:45-06:00

1 stop33h 15m

£1,182

LondonCastries

LGW - SLU

LGWSLU

London Gatwick

Tue 2/6

09:40-09:30

3 stops28h 50m

Castries George F. L. Charle

Sun 7/6

05:00-10:45

2 stops24h 45m

£1,186

LondonCastries

LGW - SLU

LGWSLU

London Gatwick

Wed 10/6

12:40-13:10

2 stops29h 30m

Castries George F. L. Charle

Thu 11/6

17:50-10:45

2 stops35h 55m

£1,230

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 12/5

08:20-09:30

2 stops30h 10m

Castries George F. L. Charle

Thu 21/5

17:50-19:45

2 stops20h 55m

£1,237

LondonCastries

LGW - SLU

LGWSLU

London Gatwick

Mon 27/4

11:00-15:15

2 stops33h 15m

Castries George F. L. Charle

Wed 6/5

15:45-05:30

2 stops32h 45m

£1,258

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 7/5

09:35-19:00

1 stop14h 25m

Castries George F. L. Charle

Thu 14/5

15:45-09:20

1 stop12h 35m

£1,323

Flights are sorted by cheapest return flights first.

Deals found on 11/3

Showing 1-10 of 39 resultsSorted by cheapest first
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Best time to book a flight from London to Castries

Have a flexible travel schedule? Discover the best time to fly to Castries 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 Castries

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

Currently, May is the cheapest month in which you can book a flight from London to Castries (average of £361). Flying from London to Castries in December is currently the most expensive (average of £665). 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.

Reviews of airlines servicing Castries

Get insights into the airlines that provide service to Castries. 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 Castries. Reviews last updated 16 March 2026.
Get a feel of what it's like to fly with British Airways from London to Castries by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,794 reviews
Check prices

Comfort

6.8

Boarding

6.9

Entertainment

6.4

Food

6.4

Crew

7.6

Overall

6.7

Reviews

1 / 20
6.0
Good

David,Jan 2026

LHR - MAD

It was a very old and tried plane. Lots of duck tape holding things together. Staff and food very good. Boarding was chaos at Madrid. Arrival in Lima swift and effective.
British Airways
6.7
Okay
7,794 reviews
British Airways
6.7
Okay
7,794 reviews
Check prices

Comfort

6.8

Boarding

6.9

Entertainment

6.4

Food

6.4

Crew

7.6

Overall

6.7

Reviews

1 / 20
6.0
Good

David,Jan 2026

LHR - MAD

It was a very old and tried plane. Lots of duck tape holding things together. Staff and food very good. Boarding was chaos at Madrid. Arrival in Lima swift and effective.

Related info for your journey

Find useful and relevant information for your journey from London to Castries. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Castries from London?

    For a flight from London to Castries, you will be flying into George F. L. Charle. Castries George F. L. Charle (SLU) is just 0.7 mi from the center of the city. George F. L. Charle is the only Castries airport and it handles 0 inbound flights from London per day. 1 airline has flights to Castries George F. L. Charle from London on a regular basis.

  • What is the cheapest airline to fly from London to Castries round-trip?

    British Airways, at £495, was found to be the cheapest airline from London to Castries.. British Airways is priced at 40% lower than the current average price of a flight leaving 3 months from now.

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

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

  • How can I find direct flights from London to Castries?

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

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

    Yes. Cheapflights offers flight deals from London to Castries 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 Castries?

    Currently, May is the cheapest month in which you can book a flight from London to Castries (average of £361). Flying from London to Castries in December is currently the most expensive (average of £665). 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

Travelling to a place near Castries?

Book flights to Castries if you plan to visit one of these locations
Gros Islet
Rodney Bay

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from London to Castries

Discover the top airline that operate flights from London to Castries. 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 16 March 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£495Average£828FlexibilityNo cancel feeOn-time70%
Search British Airways 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 Castries?

Cheapflights makes it easy to find London to Castries flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights helps you find that perfect flight to Castries from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to Castries flexibly with Cheapflights today.

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

Of course! You can now track prices for flights from London to Castries and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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