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Cheap flights from London Heathrow Airport to Castries from £494

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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SLU
17 Oct — 24 Oct1
1 adult
1 adult, Economy

Cheap 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 17 September 2025.

Round-trip from

£661

One-way from

£494

Popular in

May

Cheapest in

March

Average price

£472
6/11-13/11
  • 6/11-13/11
  • 2 total stops
  • 47h 45m total
  • London to Castries
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9/10
  • 9/10
  • 1 total stop
  • 11h 30m total
  • London to Castries
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£134 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£29 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
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Find flight deals from Heathrow to Castries

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 17 September 2025.

Thu 6/1108:00LHR - SLU
1 stop33h 10mMultiple Airlines
Thu 13/1115:20SLU - LHR
1 stop14h 35mMultiple Airlines
Deal found 15/9£661
Mon 10/1108:00LHR - SLU
1 stop13h 30mMultiple Airlines
Tue 3/207:30SLU - LHR
1 stop22h 05mMultiple Airlines
Deal found 15/9£676
Thu 13/1108:00LHR - SLU
1 stop33h 10mMultiple Airlines
Sun 30/1112:10SLU - LHR
1 stop13h 15mMultiple Airlines
Deal found 16/9£677
Wed 15/1009:35LHR - SLU
2 stops32h 35mMultiple Airlines
Mon 20/1020:20SLU - LHR
2 stops18h 40mMultiple Airlines
Deal found 16/9£756
Mon 10/1108:00LHR - SLU
1 stop13h 30mMultiple Airlines
Fri 30/113:55SLU - LHR
1 stop16h 00mMultiple Airlines
Deal found 15/9£760
Mon 24/1108:00LHR - SLU
1 stop13h 30mMultiple Airlines
Sun 7/1212:10SLU - LHR
1 stop13h 15mMultiple Airlines
Deal found 15/9£789
Tue 4/1113:25LHR - SLU
1 stop33h 35mMultiple Airlines
Tue 16/1215:45SLU - LHR
1 stop12h 45mMultiple Airlines
Deal found 15/9£807
Sun 21/917:40LHR - SLU
2 stops28h 50mMultiple Airlines
Sun 28/912:10SLU - LHR
2 stops18h 40mMultiple Airlines
Deal found 16/9£910
Sun 21/916:50LHR - SLU
2 stops28h 00mMultiple Airlines
Sun 5/1005:00SLU - LHR
2 stops34h 00mMultiple Airlines
Deal found 15/9£911

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 17 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Castries that are best for you.

Fly from

Heathrow

Fly to

Castries

Route

Depart

Return

Price

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

£661

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

£676

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

£694

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

£714

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 15/10

09:35-13:10

2 stops32h 35m

Castries George F. L. Charle

Mon 20/10

20:20-20:00

2 stops18h 40m

£758

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 6/3

10:35-12:05

1 stop29h 30m

Castries George F. L. Charle

Sun 22/3

15:45-08:30

1 stop12h 45m

£763

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 6/2

13:25-15:15

1 stop29h 50m

Castries George F. L. Charle

Sat 14/2

15:45-08:30

1 stop12h 45m

£771

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 23/2

13:20-15:15

1 stop29h 55m

Castries George F. L. Charle

Fri 27/2

15:45-08:30

1 stop12h 45m

£793

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 4/11

13:25-19:00

1 stop33h 35m

Castries George F. L. Charle

Tue 16/12

15:45-08:30

1 stop12h 45m

£807

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 18/2

09:40-14:35

1 stop32h 55m

Castries George F. L. Charle

Sun 1/3

12:10-05:25

1 stop13h 15m

£866

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 12 results
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.

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 17 September 2025.
Check out reviews from past customers who have flown with British Airways from London Heathrow Airport to Castries to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,363 reviews
Check prices

Boarding

6.9

Crew

7.6

Entertainment

6.4

Overall

6.7

Food

6.3

Comfort

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

LHR - FCO

The crew was wonderful. Service was great. The discomfort came from the passenger behind me kicking the seat.
British Airways
6.7
Okay
7,363 reviews
British Airways
6.7
Okay
7,363 reviews
Check prices

Boarding

6.9

Crew

7.6

Entertainment

6.4

Overall

6.7

Food

6.3

Comfort

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

LHR - FCO

The crew was wonderful. Service was great. The discomfort came from the passenger behind me kicking the seat.

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. 1 airline 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.

  • What is the cheapest airline to fly from London Heathrow Airport to Castries round-trip?

    Currently priced at £419, British Airways will fly you from London Heathrow Airport to Castries and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. British Airways is 33% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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

Top airline flying from Heathrow to Castries

Discover the top airline that operate flights from Heathrow 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 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£419Average£580FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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

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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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