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Cheap flights from London Heathrow Airport to Castries from £579

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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SLU
27 May — 3 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Castries

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Castries
Explore the most affordable flight options available from Heathrow to Castries. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 April 2026.

Thu 11/610:45
LHR
-
SLU
1 stop13h 15m
Multiple Airlines
Thu 18/612:35
SLU
-
LHR
1 stop12h 15m
Multiple Airlines
Deal found 27/4£821
Wed 10/611:10
LHR
-
SLU
1 stop29h 55m
Multiple Airlines
Wed 17/615:45
SLU
-
LHR
1 stop33h 05m
Multiple Airlines
Deal found 26/4£837
Tue 1/911:10
LHR
-
SLU
1 stop29h 55m
Multiple Airlines
Tue 15/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 23/4£851
Sat 13/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Sat 20/612:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 23/4£898
Fri 29/511:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Fri 19/612:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 25/4£910
Tue 1/909:35
LHR
-
SLU
1 stop13h 50m
Multiple Airlines
Mon 28/916:20
SLU
-
LHR
1 stop12h 00m
Multiple Airlines
Deal found 26/4£928
Tue 2/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Fri 5/612:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 26/4£958
Sat 30/511:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Sun 7/612:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 22/4£975
Tue 2/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Thu 4/612:35
SLU
-
LHR
1 stop12h 15m
Multiple Airlines
Deal found 22/4£998
Wed 13/511:45
LHR
-
SLU
2 stops30h 25m
Multiple Airlines
Sun 17/505:00
SLU
-
LHR
3 stops28h 35m
Multiple Airlines
Deal found 22/4£1,004
Sat 4/711:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Tue 14/712:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 26/4£1,008
Fri 26/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Fri 3/712:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 23/4£1,015

Find flight deals from Heathrow to Castries

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) 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 April 2026.

Round-trip from

£821

One-way from

£579

Popular in

August

Cheapest in

November
11/6-18/6
  • 11/6-18/6
  • 2 total stops
  • 25h 30m total
  • London to Castries
Search Deals
5/10
  • 5/10
  • 2 total stops
  • 31h 45m total
  • London to Castries
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£111 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease (£54 potential savings vs. average return price).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow 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 April 2026.
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

Cheapest return flight

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 10/6

11:10-12:05

1 stop29h 55m

Castries George F. L. Charle

Wed 17/6

15:45-05:50

1 stop33h 05m

£837
Fastest return journey

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 29/5

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Fri 19/6

12:35-06:15

1 stop12h 40m

£910

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sun 27/9

09:35-19:00

1 stop14h 25m

Castries George F. L. Charle

Fri 2/10

12:35-09:20

1 stop15h 45m

£1,059

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 10/7

09:35-19:00

1 stop14h 25m

Castries George F. L. Charle

Mon 10/8

16:20-09:20

1 stop12h 00m

£1,141

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 8/6

16:50-15:35

3 stops27h 45m

Castries George F. L. Charle

Thu 11/6

17:50-08:05

3 stops33h 15m

£1,153

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 9/9

09:50-13:10

3 stops32h 20m

Castries George F. L. Charle

Mon 14/9

19:10-07:15

2 stops31h 05m

£1,174

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 16/10

07:40-13:10

3 stops34h 30m

Castries George F. L. Charle

Thu 22/10

17:50-08:50

2 stops34h 00m

£1,199

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 22/7

09:35-19:00

1 stop14h 25m

Castries George F. L. Charle

Sat 1/8

15:45-09:20

1 stop12h 35m

£1,217

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 2/6

07:40-09:30

3 stops30h 50m

Castries George F. L. Charle

Thu 4/6

13:55-14:15

2 stops19h 20m

£1,219

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 4/7

11:20-14:35

2 stops32h 15m

Castries George F. L. Charle

Tue 14/7

19:10-20:10

2 stops20h 00m

£1,261

Flights are sorted by cheapest return flights first.

Deals found on 26/4

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to Castries

Have a flexible travel schedule? Discover the best time to fly to Castries from Heathrow 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.

Related info for your journey

Find useful and relevant information for your journey from Heathrow 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 Heathrow?

    Castries George F. L. Charle (SLU), located 0.7 mi from the city center, is the airport you fly into when you book flights from London Heathrow to Castries. 0 airlines have flights to George F. L. Charle from London Heathrow on a regular basis. Booking flights from London Heathrow to Castries George F. L. Charle should not be difficult; the airport handles an average of 0 inbound flights from London Heathrow per day.

  • Can I find deals for flights from Heathrow to Castries that include hotel bookings?

    Yes. In addition to deals on Heathrow to Castries flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Castries?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Castries.

  • Can I find deals for business class flights from Heathrow to Castries?

    Yes. Cheapflights offers flight deals from Heathrow 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.

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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Alternative routes for Heathrow to Castries

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Castries flights
Gatwick to Castries flights
London City to Castries flights
Gatwick to Castries flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Heathrow to Castries?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Castries from Heathrow today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Castries?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Castries for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Heathrow to Castries with no change fees?

Yes! Cheapflights helps users easily find flights from Heathrow to Castries with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Castries become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Castries from Heathrow today and book when prices fit your budget.

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