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Cheap flights from London Heathrow Airport to Castries from £468

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 Heathrow Airport to Castries departing on 20/11. 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 Heathrow Airport to Castries

Cheap return flights

Logo
09:40 - 14:35LHR-SLU
32h 55m1 stop
Logo
07:30 - 05:25SLU-LHR
17h 55m1 stop
£637
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Wed, 5 Nov - Tue, 11 Nov
Logo
08:00 - 13:10LHR-SLU
33h 10m1 stop
Logo
15:20 - 09:55SLU-LHR
14h 35m1 stop
£663
Find Deal
Thu, 6 Nov - Thu, 13 Nov
Logo
08:00 - 17:30LHR-SLU
13h 30m1 stop
Logo
07:30 - 09:35SLU-LHR
22h 05m1 stop
£678
Find Deal
Mon, 10 Nov - Tue, 3 Feb
Logo
09:40 - 17:30LHR-SLU
11h 50m1 stop
Logo
12:10 - 05:25SLU-LHR
13h 15m1 stop
£690
Find Deal
Mon, 9 Mar - Sun, 15 Mar
Logo
10:35 - 19:00LHR-SLU
12h 25m1 stop
Logo
15:45 - 08:30SLU-LHR
12h 45m1 stop
£696
Find Deal
Wed, 4 Mar - Wed, 11 Mar
Logo
10:35 - 19:00LHR-SLU
12h 25m1 stop
Logo
12:35 - 05:50SLU-LHR
13h 15m1 stop
£701
Find Deal
Tue, 10 Mar - Tue, 24 Mar
Logo
13:20 - 13:10LHR-SLU
27h 50m1 stop
Logo
15:20 - 09:55SLU-LHR
14h 35m1 stop
£717
Find Deal
Thu, 5 Feb - Thu, 19 Feb
Logo
13:25 - 19:00LHR-SLU
33h 35m1 stop
Logo
15:45 - 08:30SLU-LHR
12h 45m1 stop
£730
Find Deal
Tue, 20 Jan - Sat, 24 Jan
Logo
14:30 - 11:25LHR-SLU
24h 55m1 stop
Logo
13:55 - 05:25SLU-LHR
11h 30m1 stop
£752
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Sat, 14 Mar - Fri, 20 Mar
Logo
13:25 - 15:15LHR-SLU
29h 50m1 stop
Logo
15:45 - 08:30SLU-LHR
12h 45m1 stop
£753
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Sat, 14 Mar - Sat, 21 Mar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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 16 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Castries that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 5/11

09:40-14:35

1 stop32h 55m

Castries George F. L. Charle

Tue 11/11

07:30-05:25

1 stop17h 55m

£637

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 6/11

08:00-13:10

1 stop33h 10m

Castries George F. L. Charle

Thu 13/11

15:20-09:55

1 stop14h 35m

£663

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 10/11

08:00-17:30

1 stop13h 30m

Castries George F. L. Charle

Tue 3/2

07:30-09:35

1 stop22h 05m

£678

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 9/3

09:40-17:30

1 stop11h 50m

Castries George F. L. Charle

Sun 15/3

12:10-05:25

1 stop13h 15m

£690

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 4/3

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Wed 11/3

15:45-08:30

1 stop12h 45m

£696

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 10/3

10:35-19:00

1 stop12h 25m

Castries George F. L. Charle

Tue 24/3

12:35-05:50

1 stop13h 15m

£701

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 5/2

13:20-13:10

1 stop27h 50m

Castries George F. L. Charle

Thu 19/2

15:20-09:55

1 stop14h 35m

£717

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 20/1

13:25-19:00

1 stop33h 35m

Castries George F. L. Charle

Sat 24/1

15:45-08:30

1 stop12h 45m

£730

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 14/3

14:30-11:25

1 stop24h 55m

Castries George F. L. Charle

Fri 20/3

13:55-05:25

1 stop11h 30m

£752

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 14/3

13:25-15:15

1 stop29h 50m

Castries George F. L. Charle

Sat 21/3

15:45-08:30

1 stop12h 45m

£753

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 Heathrow Airport 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 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 £504. 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 £652.

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 Heathrow Airport to Castries in the morning for as low as £575. 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 £814 per ticket.

When to book flights from London Heathrow Airport to Castries

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

Cheap London Heathrow Airport to Castries (LHR to SLU) flight deals and tips

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

Direct flights

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

    The distance between London Heathrow and Castries George F. L. Charle is about 4203.1 mi. Typically, this will take 11h 30m by plane in normal conditions.

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

    Prices for flights from London Heathrow Airport to Castries George F. L. Charle Airport are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport 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 required for your trip to Castries George F. L. Charle Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Castries George F. L. Charle Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Best airlines flying from London Heathrow Airport to Castries

Compare and see reviews for airlines that fly from London Heathrow Airport to Castries with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom £420Free 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?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Castries from London.

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

momondo does allow users to show only those flights to Castries from London which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to Castries from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to Castries from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Castries trip

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