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Cheap flights from London to Castries from £436

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 22/2. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SLU
15 Feb — 22 Feb1
1 adult
1 adult, Economy, 0 bags

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 16 January 2026.

Round-trip from

£640

One-way from

£436

Popular in

April

Cheapest in

November

Average price

£646

Good round-trip deal

£632 or less

Good one-way deal

£483 or less
2/2-16/2
  • 2/2-16/2
  • 2 total stops
  • 46h 20m total
  • London to Castries
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22/2
  • 22/2
  • 3 total stops
  • 57h 45m total
  • London to Castries
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Highest demand for flights based on searches. 24% potential increase in price (£191 potential increase over avg. return price).
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Cheapest flight prices on average. 17% potential price decrease (£86 potential savings vs. average return price).
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Average for round-trip flights in January 2026
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Price to beat on a round-trip flight from London (LON) to Castries George F. L. Charle.
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Price to beat on a one-way flight from London (LON) to Castries George F. L. Charle.
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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 16 January 2026.

Mon 2/213:20
LHR
-
SLU
1 stop33h 05m
Multiple Airlines
Mon 16/216:20
SLU
-
LHR
1 stop13h 15m
Multiple Airlines
Deal found 15/1£640
Wed 21/109:40
LHR
-
SLU
1 stop32h 55m
Multiple Airlines
Wed 4/209:10
SLU
-
LHR
1 stop16h 15m
Multiple Airlines
Deal found 14/1£705
Wed 25/208:00
LHR
-
SLU
1 stop15h 00m
Multiple Airlines
Wed 11/312:35
SLU
-
LHR
1 stop12h 50m
Multiple Airlines
Deal found 15/1£705
Tue 17/309:40
LHR
-
SLU
1 stop12h 45m
Multiple Airlines
Wed 25/312:35
SLU
-
LHR
1 stop12h 50m
Multiple Airlines
Deal found 13/1£710
Mon 9/309:40
LHR
-
SLU
1 stop12h 45m
Multiple Airlines
Wed 18/312:35
SLU
-
LHR
1 stop12h 50m
Multiple Airlines
Deal found 14/1£711
Fri 13/309:40
LHR
-
SLU
1 stop30h 25m
Multiple Airlines
Thu 19/315:45
SLU
-
LHR
1 stop14h 10m
Multiple Airlines
Deal found 15/1£718
Sat 31/114:30
LHR
-
SLU
1 stop28h 45m
Multiple Airlines
Sat 7/215:45
SLU
-
LHR
1 stop13h 50m
Multiple Airlines
Deal found 14/1£719
Sun 6/909:20
LHR
-
SLU
1 stop14h 40m
Multiple Airlines
Mon 21/916:20
SLU
-
LHR
1 stop12h 00m
Multiple Airlines
Deal found 14/1£720
Sat 25/409:20
LHR
-
SLU
1 stop14h 40m
Multiple Airlines
Sat 2/515:45
SLU
-
LHR
1 stop12h 35m
Multiple Airlines
Deal found 13/1£722
Fri 23/110:40
LGW
-
SLU
3 stops30h 30m
Multiple Airlines
Thu 5/218:20
SLU
-
LGW
2 stops31h 40m
Multiple Airlines
Deal found 15/1£933
Thu 29/119:35
LGW
-
SLU
2 stops26h 50m
Multiple Airlines
Thu 5/212:35
SLU
-
LGW
1 stop12h 55m
Multiple Airlines
Deal found 15/1£954
Mon 2/210:40
LGW
-
SLU
3 stops32h 55m
Multiple Airlines
Mon 9/219:10
SLU
-
LGW
3 stops35h 45m
Multiple Airlines
Deal found 14/1£999

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 January 2026.
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

12:35-05:25

1 stop12h 50m

£705

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 25/4

09:20-19:00

1 stop14h 40m

Castries George F. L. Charle

Sat 2/5

15:45-09:20

1 stop12h 35m

£722

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 6/2

09:40-15:15

1 stop33h 35m

Castries George F. L. Charle

Fri 6/3

12:35-05:25

1 stop12h 50m

£741

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 20/4

09:20-18:25

1 stop14h 05m

Castries George F. L. Charle

Mon 27/4

16:20-09:20

1 stop12h 00m

£777

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 25/4

09:20-19:00

1 stop14h 40m

Castries George F. L. Charle

Sat 9/5

15:45-09:20

1 stop12h 35m

£823

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 20/2

09:40-19:00

1 stop13h 20m

Castries George F. L. Charle

Mon 2/3

16:20-05:25

1 stop33h 05m

£839

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 13/3

08:55-13:10

2 stops32h 15m

Castries George F. L. Charle

Thu 19/3

17:50-20:10

2 stops22h 20m

£840

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 9/3

20:00-15:35

3 stops23h 35m

Castries George F. L. Charle

Wed 18/3

10:15-20:10

3 stops29h 55m

£869

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sun 1/3

20:00-15:35

2 stops23h 35m

Castries George F. L. Charle

Sat 7/3

09:10-20:10

3 stops31h 00m

£873

LondonCastries

LGW - SLU

LGWSLU

London Gatwick

Thu 29/1

19:35-18:25

2 stops26h 50m

Castries George F. L. Charle

Thu 5/2

12:35-05:30

1 stop12h 55m

£954

Flights are sorted by cheapest return flights first.

Deals found on 15/1

Showing 1-10 of 25 results
1
2
3

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 December is currently the most expensive (average of £637). 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 16 January 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
7,680 reviews
Check prices

Entertainment

6.4

Boarding

6.9

Comfort

6.8

Crew

7.6

Overall

6.7

Food

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
7,680 reviews
British Airways
6.7
Okay
7,680 reviews
Check prices

Entertainment

6.4

Boarding

6.9

Comfort

6.8

Crew

7.6

Overall

6.7

Food

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 £450, was found to be the cheapest airline from London to Castries.. British Airways is priced at 41% 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 December is currently the most expensive (average of £637). 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 January 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£450Average£638FlexibilityNo 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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