| Abbreviation | Definition |
|---|---|
| SIT | Sitka Airport, Sitka, Alaska USA |
| SIU | Siuna, Nicaragua |
| SIX | Singleton, New South Wales, Australia |
| SIY | Siskiyou Airport Yreka, Yreka Rohner Field, Montague, California USA |
| SIZ | Sissano, Papua New Guinea |
| SJB | San Joaquin, Bolovia |
| SJC | Mineta San José International Airport, San Jose, California USA |
| SJD | San Jose del Cabo Airport, Los Cabos, Mexico |
| SJE | San Jose Del Guaviaro, Colombia |
| SJF | St. John, Virgin Islands |
| SJG | San Pedro Jagua, Colombia |
| SJI | San Jose, Philippines |
| SJJ | Sarajevo Butmir, Bosnia |
| SJK | Sao Jose Dos Campos, Sao Paulo, Brazil |
| SJL | Sao Gabriel, Rio Grande do Sul, Brazil |
| SJM | San Juan De La Madre, Dominican Republic |
| SJN | St. Johns, Arizona USA |
| SJO | Juan Santamaria International Airport, San Jose, Costa Rica |
| SJP | Sao Jose Do Rio Preto, Sao Paulo, Brazil |
| SJQ | Sesheke, Zambia |