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Cheap flights from London Heathrow Airport to Castries from £563

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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SLU
6 Jun — 13 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 7 May 2026.

Wed 16/911:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Sun 4/1012:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 7/5£788
Sun 14/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Wed 24/612:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 4/5£804
Mon 21/911:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Wed 30/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 7/5£814
Sun 6/911:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Sun 20/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 7/5£830
Wed 3/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Wed 10/615:45
SLU
-
LHR
1 stop33h 05m
Multiple Airlines
Deal found 4/5£841
Sat 5/911:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Sat 12/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 4/5£845
Wed 2/911:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Mon 7/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 4/5£910
Mon 16/1109:40
LHR
-
SLU
1 stop12h 45m
Multiple Airlines
Tue 24/1116:20
SLU
-
LHR
1 stop33h 05m
Multiple Airlines
Deal found 7/5£912
Tue 1/911:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Thu 10/912:35
SLU
-
LHR
1 stop12h 15m
Multiple Airlines
Deal found 7/5£913
Wed 27/507:05
LHR
-
SLU
3 stops35h 05m
Multiple Airlines
Thu 4/617:50
SLU
-
LHR
3 stops34h 45m
Multiple Airlines
Deal found 4/5£920

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 7 May 2026.

Round-trip from

£788

One-way from

£563

Popular in

August

Cheapest in

November

Average price

£887
16/9-4/10
  • 16/9-4/10
  • 2 total stops
  • 25h 30m total
  • London to Castries
Search Deals
12/6
  • 12/6
  • 3 total stops
  • 43h 30m total
  • London to Castries
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£154 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease (£51 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
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 7 May 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
Fastest return journey

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sun 14/6

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Wed 24/6

12:35-06:15

1 stop12h 40m

£804

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 27/5

20:50-17:05

3 stops25h 15m

Castries George F. L. Charle

Thu 4/6

13:55-14:15

2 stops19h 20m

£1,087

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 26/6

08:40-22:10

3 stops42h 30m

Castries George F. L. Charle

Fri 3/7

15:20-14:15

2 stops17h 55m

£1,237

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 24/9

20:05-14:35

2 stops23h 30m

Castries George F. L. Charle

Mon 12/10

19:10-20:10

2 stops20h 00m

£1,259

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 24/9

09:35-19:00

1 stop14h 25m

Castries George F. L. Charle

Sun 4/10

09:10-09:20

1 stop19h 10m

£1,261

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 5/9

09:35-19:00

1 stop14h 25m

Castries George F. L. Charle

Mon 14/9

19:10-20:10

2 stops20h 00m

£1,262

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Tue 1/9

20:05-19:00

3 stops27h 55m

Castries George F. L. Charle

Thu 10/9

15:45-20:10

3 stops23h 25m

£1,276

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 27/6

14:10-19:00

3 stops33h 50m

Castries George F. L. Charle

Thu 2/7

13:55-14:15

2 stops19h 20m

£1,294

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 2/10

12:40-19:00

3 stops35h 20m

Castries George F. L. Charle

Tue 20/10

12:35-20:10

3 stops26h 35m

£1,306

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 5/10

20:05-15:35

3 stops24h 30m

Castries George F. L. Charle

Mon 19/10

12:35-21:00

3 stops27h 25m

£1,345

Flights are sorted by cheapest return flights first.

Deals found on 6/5

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?

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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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