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Cheap flights from London to Castries from £496

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 31/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SLU
4 Jan — 11 Jan1
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 5 December 2025.

Mon 8/1209:40LHR - SLU
1 stop11h 50mMultiple Airlines
Fri 24/415:45SLU - LHR
1 stop15h 15mMultiple Airlines
Deal found 3/12£721
Sat 6/1214:30LHR - SLU
1 stop24h 55mMultiple Airlines
Tue 9/1207:30SLU - LHR
1 stop22h 05mMultiple Airlines
Deal found 3/12£786
Thu 11/1213:20LHR - SLU
1 stop27h 50mMultiple Airlines
Thu 18/1215:20SLU - LHR
1 stop14h 15mMultiple Airlines
Deal found 3/12£912
Thu 4/1214:50LHR - SLU
3 stops32h 10mMultiple Airlines
Sat 31/118:20SLU - LHR
3 stops32h 50mMultiple Airlines
Deal found 4/12£1,081
Wed 24/1213:25LHR - SLU
2 stops33h 35mMultiple Airlines
Thu 22/118:20SLU - LHR
3 stops32h 50mMultiple Airlines
Deal found 3/12£1,125
Wed 24/1210:40LGW - SLU
2 stops36h 20mMultiple Airlines
Thu 22/109:10SLU - LGW
2 stops16h 10mMultiple Airlines
Deal found 3/12£1,131
Tue 30/1213:20LHR - SLU
1 stop29h 55mMultiple Airlines
Sun 11/112:10SLU - LHR
1 stop13h 15mMultiple Airlines
Deal found 4/12£1,162
Tue 23/1213:25LHR - SLU
3 stops33h 35mMultiple Airlines
Thu 22/118:20SLU - LHR
3 stops32h 50mMultiple Airlines
Deal found 3/12£1,178
Tue 16/1213:25LHR - SLU
2 stops33h 35mMultiple Airlines
Wed 31/1209:10SLU - LHR
2 stops22h 10mMultiple Airlines
Deal found 3/12£1,279
Thu 11/1211:40LGW - SLU
2 stops27h 50mMultiple Airlines
Thu 18/1209:10SLU - LGW
1 stop16h 20mMultiple Airlines
Deal found 3/12£1,528
Sat 27/1220:15LGW - SLU
2 stops26h 10mMultiple Airlines
Mon 29/1216:20SLU - LGW
3 stops45h 30mMultiple Airlines
Deal found 3/12£1,578
Tue 23/1211:40LGW - SLU
2 stops25h 50mMultiple Airlines
Thu 22/118:20SLU - LGW
2 stops31h 40mMultiple Airlines
Deal found 3/12£1,643

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 5 December 2025.

Round-trip from

£695

One-way from

£496

Popular in

April

Cheapest in

November

Average price

£994

Good round-trip deal

£676 or less

Good one-way deal

£455 or less
27/4-13/5
  • 27/4-13/5
  • 2 total stops
  • 27h 10m total
  • London to Castries
Search Deals
31/5
  • 31/5
  • 2 total stops
  • 31h 30m total
  • London to Castries
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£81 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease (£52 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 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 5 December 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

Mon 27/4

12:05-19:00

1 stop11h 55m

Castries George F. L. Charle

Wed 13/5

15:45-12:00

1 stop15h 15m

£695

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 27/1

13:20-15:15

1 stop29h 55m

Castries George F. L. Charle

Fri 6/2

15:45-09:55

1 stop14h 10m

£698

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sun 1/3

08:00-19:00

1 stop15h 00m

Castries George F. L. Charle

Sun 15/3

09:10-09:55

1 stop20h 45m

£700

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 19/1

09:40-17:30

1 stop11h 50m

Castries George F. L. Charle

Mon 26/1

15:45-09:55

1 stop14h 10m

£702

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 29/4

12:05-19:00

1 stop11h 55m

Castries George F. L. Charle

Wed 6/5

09:10-12:00

1 stop21h 50m

£728

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 28/5

12:05-19:00

1 stop11h 55m

Castries George F. L. Charle

Thu 4/6

15:45-12:00

1 stop15h 15m

£743

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 5/3

13:25-19:00

1 stop33h 35m

Castries George F. L. Charle

Tue 10/3

12:35-05:50

1 stop13h 15m

£753

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 17/3

13:25-12:05

1 stop26h 40m

Castries George F. L. Charle

Tue 31/3

12:35-12:25

1 stop18h 50m

£990

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 1/1

13:20-13:10

1 stop27h 50m

Castries George F. L. Charle

Thu 8/1

15:20-10:15

2 stops14h 55m

£1,088

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sun 22/3

08:00-19:00

1 stop15h 00m

Castries George F. L. Charle

Sun 12/4

15:45-12:00

1 stop15h 15m

£1,098

Flights are sorted by cheapest return flights first.

Deals found on 3/12

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 £286). Flying from London to Castries in July is currently the most expensive (average of £580). 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 5 December 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
7,562 reviews
Check prices

Boarding

6.9

Food

6.4

Crew

7.6

Comfort

6.7

Overall

6.7

Entertainment

6.4

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
7,562 reviews
British Airways
6.7
Okay
7,562 reviews
Check prices

Boarding

6.9

Food

6.4

Crew

7.6

Comfort

6.7

Overall

6.7

Entertainment

6.4

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 £453, was found to be the cheapest airline from London to Castries.. British Airways is priced at 37% 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 £286). Flying from London to Castries in July is currently the most expensive (average of £580). 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 5 December 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£453Average£586FlexibilityNo 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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