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Cheap flights from London to Castries from £354

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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SLU
27 Dec — 3 Jan1
1 adult
1 adult, Economy, 0 bags

Find 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 27 November 2025.

Thu 27/1113:20LHR - SLU
1 stop27h 50mMultiple Airlines
Sun 30/1112:10SLU - LHR
1 stop13h 15mMultiple Airlines
Deal found 26/11£726
Thu 4/1213:20LHR - SLU
1 stop29h 55mMultiple Airlines
Mon 8/1215:45SLU - LHR
1 stop14h 55mMultiple Airlines
Deal found 26/11£870
Wed 3/1213:25LHR - SLU
3 stops33h 35mMultiple Airlines
Wed 10/1210:15SLU - LHR
3 stops21h 05mMultiple Airlines
Deal found 26/11£892
Thu 27/1119:35LGW - SLU
2 stops26h 50mMultiple Airlines
Sun 30/1112:10SLU - LGW
1 stop13h 25mMultiple Airlines
Deal found 26/11£1,006
Mon 8/1209:40LHR - SLU
1 stop30h 25mMultiple Airlines
Fri 9/113:55SLU - LHR
1 stop11h 30mMultiple Airlines
Deal found 26/11£1,017
Fri 28/1113:50LGW - SLU
2 stops31h 45mMultiple Airlines
Thu 4/1212:35SLU - LGW
1 stop12h 55mMultiple Airlines
Deal found 26/11£1,027
Fri 5/1218:00LHR - SLU
2 stops32h 10mMultiple Airlines
Wed 10/1210:15SLU - LHR
3 stops30h 20mMultiple Airlines
Deal found 25/11£1,036
Fri 28/1113:25LHR - SLU
1 stop29h 50mMultiple Airlines
Thu 4/1215:45SLU - LHR
1 stop12h 45mMultiple Airlines
Deal found 26/11£1,038
Sat 13/1214:30LHR - SLU
1 stop24h 55mMultiple Airlines
Mon 22/1212:35SLU - LHR
1 stop12h 50mMultiple Airlines
Deal found 24/11£1,041
Mon 15/1209:40LHR - SLU
1 stop11h 50mMultiple Airlines
Sun 21/1212:10SLU - LHR
1 stop13h 15mMultiple Airlines
Deal found 26/11£1,054
Sat 29/1111:40LGW - SLU
2 stops31h 35mMultiple Airlines
Sat 6/1218:20SLU - LGW
2 stops35h 25mMultiple Airlines
Deal found 25/11£1,099
Sun 30/1119:55LGW - SLU
2 stops46h 50mMultiple Airlines
Thu 4/1212:35SLU - LGW
1 stop12h 55mMultiple Airlines
Deal found 25/11£1,138

Cheap 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 27 November 2025.

Round-trip from

£704

One-way from

£354

Popular in

April

Cheapest in

November

Average price

£503

Good round-trip deal

£688 or less

Good one-way deal

£439 or less
25/2-11/3
  • 25/2-11/3
  • 2 total stops
  • 29h 10m total
  • London to Castries
Search Deals
9/3
  • 9/3
  • 3 total stops
  • 51h 20m total
  • London to Castries
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£84 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease (£53 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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 27 November 2025.
Use the filters below to find and compare flights from London to Castries that are best for you.

Fly from

London

Fly to

Castries

Route

Depart

Return

Price

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 25/2

08:00-19:00

1 stop15h 00m

Castries George F. L. Charle

Wed 11/3

15:45-09:55

1 stop14h 10m

£705

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 23/2

09:40-17:30

1 stop11h 50m

Castries George F. L. Charle

Mon 9/3

15:45-09:55

1 stop14h 10m

£707

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 5/2

13:25-15:15

1 stop29h 50m

Castries George F. L. Charle

Fri 13/2

12:35-05:50

1 stop13h 15m

£770

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 7/3

13:25-19:00

1 stop33h 35m

Castries George F. L. Charle

Sat 14/3

15:45-08:30

1 stop12h 45m

£788

LondonCastries

LGW - SLU

LGWSLU

London Gatwick

Sat 31/1

20:15-18:25

2 stops26h 10m

Castries George F. L. Charle

Sat 14/2

13:55-19:10

2 stops25h 15m

£789

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 20/1

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Tue 10/2

15:45-08:30

1 stop12h 45m

£793

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 17/1

14:30-12:05

1 stop25h 35m

Castries George F. L. Charle

Sun 25/1

15:45-09:55

1 stop14h 10m

£805

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 29/1

13:25-12:05

1 stop26h 40m

Castries George F. L. Charle

Thu 5/2

15:45-08:30

1 stop12h 45m

£841

LondonCastries

LGW - SLU

LGWSLU

London Gatwick

Wed 28/1

19:25-17:35

2 stops26h 10m

Castries George F. L. Charle

Thu 5/2

12:35-05:30

1 stop12h 55m

£858

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 18/4

12:05-19:00

1 stop11h 55m

Castries George F. L. Charle

Sat 25/4

15:45-12:00

1 stop15h 15m

£866

Flights are sorted by cheapest return flights first.

Deals found on 24/11

Showing 1-10 of 36 results
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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, March is the cheapest month in which you can book a flight from London to Castries (average of £289). Flying from London to Castries in July is currently the most expensive (average of £586). 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 much does it cost for a return flight from London to Castries?

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 27 November 2025.
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
7,539 reviews
Check prices

Comfort

6.7

Crew

7.6

Entertainment

6.4

Overall

6.7

Boarding

6.9

Food

6.3

Reviews

1 / 20
10.0
Excellent

María Victoria,Nov 2025

LHR - GRU

Seats were comfortable for economy. Blanket and pillow provided, same as headphones. For some reason the uk plug wouldn’t charge and had to use the US charger. Also couldn’t use WiFi as keep saying BA club pw was wrong although it wasn’t: but minor things. Overall good flight and attentive crew.
British Airways
6.7
Okay
7,539 reviews
British Airways
6.7
Okay
7,539 reviews
Check prices

Comfort

6.7

Crew

7.6

Entertainment

6.4

Overall

6.7

Boarding

6.9

Food

6.3

Reviews

1 / 20
10.0
Excellent

María Victoria,Nov 2025

LHR - GRU

Seats were comfortable for economy. Blanket and pillow provided, same as headphones. For some reason the uk plug wouldn’t charge and had to use the US charger. Also couldn’t use WiFi as keep saying BA club pw was wrong although it wasn’t: but minor things. Overall good flight and attentive crew.

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 £433, 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, March is the cheapest month in which you can book a flight from London to Castries (average of £289). Flying from London to Castries in July is currently the most expensive (average of £586). 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 27 November 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£433Average£561FlexibilityNo 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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