Sirri Island - Sirri Island, Iran (SXI) Sishen - Sishen, South Africa (SIS) Sisimiut - Sisimiut, Greenland (JHS) Sissano - Sissano, Papua New Guinea (SIZ) Sitia - Sitia, Greece (JSH) Sitiawan - Sitiawan, Malaysia (SWY) Sitka - Sitka, USA (SIT) Sitkinak Island - Sitkinak Cgs, USA (SKJ) Sittwe - Civil, Myanmar (AKY) Siuna - Siuna, Nicaragua (SIU) Sivas - Sivas, Turkey (VAS) Siwa - Siwa, Egypt (SEW) Siwea - Siwea, Papua New Guinea (SWE) Skagway - Municipal, USA (SGY) Skardu - Skardu, Pakistan (KDU) Skeldon - Skeldon, Guyana (SKM) Skelleftea - Skelleftea, Sweden (SFT) Skiathos - Skiathos, Greece (JSI) Skien - Skien, Norway (SKE) Skikda - Skikda,