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Cheap flights from London to Castries from £347

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Castries departing on 21/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from London to Castries

Cheap return flights

Logo
08:05 - 14:35LHR-SLU
11h 30m1 stop
Logo
15:20 - 07:50SLU-LHR
11h 30m1 stop
£674
Find Deal
Thu, 25 Sep - Thu, 9 Oct
Logo
08:05 - 14:35LHR-SLU
11h 30m1 stop
Logo
15:20 - 09:55SLU-LHR
14h 35m1 stop
£676
Find Deal
Thu, 23 Oct - Thu, 6 Nov
Logo
08:05 - 11:25LHR-SLU
32h 20m1 stop
Logo
15:20 - 07:50SLU-LHR
11h 30m1 stop
£706
Find Deal
Sat, 27 Sep - Thu, 9 Oct
Logo
13:25 - 12:05LHR-SLU
26h 40m1 stop
Logo
15:45 - 08:30SLU-LHR
12h 45m1 stop
£736
Find Deal
Sat, 7 Feb - Wed, 18 Feb
Logo
19:25 - 11:25LHR-SLU
44h 00m2 stops
Logo
13:55 - 05:25SLU-LHR
11h 30m1 stop
£738
Find Deal
Fri, 6 Mar - Fri, 20 Mar
Logo
08:05 - 11:25LHR-SLU
32h 20m1 stop
Logo
15:20 - 07:50SLU-LHR
11h 30m1 stop
£745
Find Deal
Sat, 27 Sep - Thu, 9 Oct
Logo
10:35 - 19:00LHR-SLU
12h 25m1 stop
Logo
12:35 - 05:50SLU-LHR
13h 15m1 stop
£749
Find Deal
Fri, 6 Mar - Fri, 20 Mar
Logo
09:35 - 13:10LHR-SLU
32h 35m2 stops
Logo
12:15 - 20:00SLU-LHR
26h 45m2 stops
£759
Find Deal
Fri, 10 Oct - Fri, 17 Oct
Logo
09:35 - 13:10LHR-SLU
32h 35m2 stops
Logo
12:15 - 20:00SLU-LHR
26h 45m3 stops
£768
Find Deal
Fri, 10 Oct - Fri, 17 Oct
Logo
14:45 - 11:45LHR-SLU
26h 00m3 stops
Logo
18:20 - 10:00SLU-LHR
34h 40m2 stops
£771
Find Deal
Sat, 27 Sep - Thu, 9 Oct

momondo 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, momondo users made 279,928 searches. Data last updated 12 September 2025.
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

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 25/9

08:05-14:35

1 stop11h 30m

Castries George F. L. Charle

Thu 9/10

15:20-07:50

1 stop11h 30m

£674

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 23/10

08:05-14:35

1 stop11h 30m

Castries George F. L. Charle

Thu 6/11

15:20-09:55

1 stop14h 35m

£676

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 27/9

08:05-11:25

1 stop32h 20m

Castries George F. L. Charle

Thu 9/10

15:20-07:50

1 stop11h 30m

£706

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 7/2

13:25-12:05

1 stop26h 40m

Castries George F. L. Charle

Wed 18/2

15:45-08:30

1 stop12h 45m

£736

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 6/3

19:25-11:25

2 stops44h 00m

Castries George F. L. Charle

Fri 20/3

13:55-05:25

1 stop11h 30m

£738

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 27/9

08:05-11:25

1 stop32h 20m

Castries George F. L. Charle

Thu 9/10

15:20-07:50

1 stop11h 30m

£745

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 6/3

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Fri 20/3

12:35-05:50

1 stop13h 15m

£749

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 10/10

09:35-13:10

2 stops32h 35m

Castries George F. L. Charle

Fri 17/10

12:15-20:00

2 stops26h 45m

£759

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 10/10

09:35-13:10

2 stops32h 35m

Castries George F. L. Charle

Fri 17/10

12:15-20:00

3 stops26h 45m

£768

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 27/9

14:45-11:45

3 stops26h 00m

Castries George F. L. Charle

Thu 9/10

18:20-10:00

2 stops34h 40m

£771

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Castries from

How to get the cheapest flight ticket from London to Castries

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between London and Castries?

What is the cheapest month to fly to Castries?

The month of September is, on average, the cheapest month to fly to Castries from London, with most prices found around £475. If you’re not able to fly to Castries in September, then November is your next best option. Flight prices from London to Castries during November average around £490.

What is the cheapest day to depart on your flight to Castries?

Our data shows that Sunday is the least expensive day to fly to Castries. Tickets to fly out on this day can be as low as £506. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Castries on Saturday is £654.

What is the cheapest time of day to depart on your flight to Castries?

According to our data, the cheapest time of day to fly to Castries is in the morning. momondo users have found flights departing from London to Castries in the morning for as low as £577. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the afternoon is when there is more demand to fly to Castries, so prices are often more expensive at around £817 per ticket.

When to book flights from London to Castries

Are you open to changing your travel dates? Check out the ideal times to fly from London to Castries according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London to Castries (LON to SLU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Castries

Direct flights

None
There are no direct flights from London to Castries. There are no popular flight routes from London to Castries.
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  • How far is London to Castries George F. L. Charle by plane?

    London and Castries George F. L. Charle are 4217.4 mi apart from one another. A reasonable flight in good conditions will take 11h 30m.

  • When did momondo last update prices for flights from London to Castries George F. L. Charle Airport?

    Prices for flights from London to Castries George F. L. Charle Airport are updated daily.

  • How many operators does momondo search for flights from London to Castries George F. L. Charle Airport?

  • How old do you have to be to fly from London to Castries George F. L. Charle Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London to Castries George F. L. Charle Airport.

  • What documentation or ID do you need to fly to Castries George F. L. Charle Airport?

    The travel and health documents you'll need for your trip to Castries George F. L. Charle Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Castries George F. L. Charle Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from London to Castries?

Best airlines flying from London to Castries

Compare and see reviews for airlines that fly from London to Castries with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom £403Free CancellationRating
6.6
7,361 reviews
Search British Airways flights

Travelling to a place near Castries?

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

Why use momondo?

Why should I use momondo to find a flight deal from London to Castries?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Castries . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from London to Castries with flexible booking policies on momondo?

Flights from London to Castries with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from London to Castries?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Castries.

I’m not ready to book a flight from London to Castries right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Castries, momondo offers a useful price alert feature which will track prices for flights to Castries from London and alert you when they change.

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