I'm creating this thread for the benefit of those wondering "what airport does that code stand for?" - especially as I have the habit of using the ICAO codes (not well known outside of aviation circles) instead of the more familiar IATA ones. :)

So, here goes:

South Africa

Johannesburg (OR Tambo): JNB/FAJS
Johannesburg (Lanseria): HLA/FALA
Cape Town International: CPT/FACT
Durban (King Shaka International): DUR/FALE
Durban (Louis Botha/Durban International): FADN (IATA code transferred to FALE on May 1, 2010)
Durban (Virginia): VIR/FAVG
Pretoria (Wonderboom): PRY/FAWB
Port Elizabeth: PLZ/FAPE
East London: ELS/FAEL
George: GRJ/FAGG
Bloemfontein: BFN/FABL
Kimberley: KIM/FAKM
Upington: UTN/FAUP
Nelspruit (Kruger Mpumalanga): MQP/FAKN
Pietermaritzburg: PZB/FAPM
Mthatha: UTT/FAUT
Pilanesberg: NTY/FAPN

Regional

Windhoek (Hosea Kutako): WDH/FYWH
Windhoek (Eros): ERS/FYWE
Gaberone: GBE/FBSK
Harare: HRE/FVHA
Lusaka: LUN/FLLS
Maputo: MPM/FQMA
Mauritius: MRU/FIMP

Continental

Dakar: DKR/GOOY
Zanzibar: ZNZ/HTZA

Intercontinental

London (Heathrow): LHR/EGLL
London (Gatwick): LGW/EGKK
Paris (Charles du Galle): CDG/LFPG
Amsterdam (Schiphol): AMS/EHAM
Frankfurt: FRA/EDDF
Dubai: DXB/OMDB
Hong Kong: HKG/VHHH
Singapore: SIN/VSSS
Perth: PER/YPPH
Melbourne: MEL/YMML
Sydney: SYD/YSSY
Auckland: AKL/NZAA
Christchurch: CHC/NZCH
New York (John F. Kennedy): JFK/KFJK
New York (Newark): EWR/KEWR
Washington (Dulles): IAD/KIAD
Atlanta: ATL/KATL
Sao Paulo (Guarulhos): GRU/SBGR
Buenos Aires: EZE/SAEZ

PM me with any other airports you'd like to see in this list. :)

Here is a site with all the airports code
http://www.prokerala.com/travel/airports/south-africa/
or
http://www.world-airport-codes.com/search/?Submit=1&criteria=south+africa&searchWhat=