Find flights
When to book
FAQs

Cheap flights from London Heathrow Airport to Castries from £573

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 16/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SLU
14 Jun — 21 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 15 May 2026.

Wed 17/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Wed 1/712:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 13/5£801
Fri 12/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Fri 19/612:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 13/5£808
Mon 8/609:35
LHR
-
SLU
1 stop13h 50m
Multiple Airlines
Mon 15/616:20
SLU
-
LHR
1 stop12h 00m
Multiple Airlines
Deal found 11/5£852
Sat 12/911:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Sat 19/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 10/5£864
Sat 5/911:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Sat 19/912:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 13/5£866
Thu 18/610:45
LHR
-
SLU
1 stop13h 15m
Multiple Airlines
Thu 25/612:35
SLU
-
LHR
1 stop12h 15m
Multiple Airlines
Deal found 12/5£883
Sat 14/1113:25
LHR
-
SLU
1 stop29h 50m
Multiple Airlines
Sat 21/1112:35
SLU
-
LHR
1 stop13h 15m
Multiple Airlines
Deal found 10/5£903
Tue 2/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Fri 19/612:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 13/5£921
Tue 27/1009:40
LHR
-
SLU
1 stop12h 45m
Multiple Airlines
Tue 3/1116:20
SLU
-
LHR
1 stop13h 35m
Multiple Airlines
Deal found 10/5£939
Sun 14/611:10
LHR
-
SLU
1 stop12h 50m
Multiple Airlines
Sat 27/612:35
SLU
-
LHR
1 stop12h 40m
Multiple Airlines
Deal found 13/5£1,023

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 15 May 2026.

Round-trip from

£801

One-way from

£573

Popular in

August

Cheapest in

November

Average price

£895
17/6-1/7
  • 17/6-1/7
  • 2 total stops
  • 25h 30m total
  • London to Castries
Search Deals
16/6
  • 16/6
  • 1 total stop
  • 13h 50m total
  • London to Castries
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£161 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease (£52 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 15 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

Wed 17/6

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Wed 1/7

12:35-06:15

1 stop12h 40m

£801

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 13/6

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Tue 23/6

12:35-06:15

1 stop12h 40m

£808

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Fri 12/6

09:35-19:00

1 stop14h 25m

Castries George F. L. Charle

Fri 19/6

18:00-09:20

2 stops34h 20m

£1,149

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 17/6

08:20-12:05

3 stops32h 45m

Castries George F. L. Charle

Tue 30/6

19:10-20:10

2 stops20h 00m

£1,194

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Wed 29/7

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Mon 3/8

09:10-06:15

1 stop16h 05m

£1,201

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 8/6

17:40-12:05

3 stops23h 25m

Castries George F. L. Charle

Sun 14/6

12:35-21:00

3 stops27h 25m

£1,224

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Thu 18/6

09:35-19:00

1 stop14h 25m

Castries George F. L. Charle

Fri 26/6

18:00-09:20

2 stops34h 20m

£1,369

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 18/7

14:05-17:05

3 stops32h 00m

Castries George F. L. Charle

Mon 7/9

19:10-09:15

3 stops33h 05m

£1,411

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Mon 20/7

11:10-19:00

1 stop12h 50m

Castries George F. L. Charle

Mon 3/8

09:10-06:15

1 stop16h 05m

£1,462

LondonCastries

LHR - SLU

LHRSLU

London Heathrow

Sat 20/6

09:35-22:10

2 stops17h 35m

Castries George F. L. Charle

Sat 27/6

15:45-09:20

1 stop12h 35m

£1,466

Flights are sorted by cheapest return flights first.

Deals found on 10/5

Showing 1-10 of 15 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.