| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| SIO (SMITHTON) | airport | Australia | -40.84 | 145.08 | 31 | 0 | |
| SIOA (Fazenda Perdizes Airport) | airport | -17.67 | -44.59 | 1969 | 0 | ||
| SIOB (Fazenda Guanabara Airport) | airport | -20.82 | -51.27 | 1362 | 0 | ||
| SIOC (Santo Expedito Airport) | airport | -21.14 | -51.55 | 1300 | 0 | ||
| SIOD (Fazenda Santa Helena Airport) | airport | -22.00 | -53.42 | 952 | 0 | ||
| SIOE (Mocelin Airport) | airport | -25.79 | -53.03 | 1850 | 0 | ||
| SIOF (Fazenda Cachoeira Airport) | airport | -21.43 | -54.38 | 1247 | 0 | ||
| SIOG (Oasis Graal Heliport) | airport | -22.80 | -42.46 | 256 | 0 | ||
| SIOH (Cauê-Ijaci Heliport) | airport | -21.19 | -44.94 | 3019 | 0 | ||
| SIOI (Rio Arraias Airport) | airport | -11.76 | -54.35 | 3773 | 0 | ||
| SIOJ (Fazenda Soroteca Airport) | airport | -15.63 | -58.31 | 749 | 0 | ||
| SIOK (Fazenda Água Doce Airport) | airport | -14.64 | -56.24 | 1313 | 0 | ||
| SIOL (Fazenda Pontal Airport) | airport | -18.32 | -48.84 | 1706 | 0 | ||
| SIOM (Rio Ouro Airport) | airport | -11.54 | -54.19 | 3741 | 0 | ||
| SION | airport | Switzerland | 46.22 | 7.33 | 1585 | 0 | |
| SION (Rio Negro Airport) | airport | -11.64 | -54.07 | 3445 | 0 | ||
| SIOO (Fazenda Piquiri Airport) | airport | -22.02 | -57.90 | 273 | 0 | ||
| SIOP (Fazenda Londrina II Airport) | airport | -21.97 | -57.85 | 272 | 0 | ||
| SIOQ (Fazenda Mato Alto Airport) | airport | -23.50 | -54.31 | 1313 | 0 | ||
| SIOR (Fazenda São Miguel Airport) | airport | -18.10 | -57.15 | 358 | 0 | ||
| SIOS (Fazenda Santa Josefa Airport) | airport | -22.77 | -53.96 | 1313 | 0 | ||
| SIOT (Fazenda Santa Vergínia Airport) | airport | -21.49 | -52.38 | 1092 | 0 | ||
| SIOU (Fazenda Santa Helena Airport) | airport | -18.30 | -57.01 | 378 | 0 | ||
| SIOUX CENTER MUNI | airport | United States | 43.13 | -96.19 | 1448 | 0 | |
| SIOUX GATEWAY COL BUD DAY FLD | airport | United States | 42.40 | -96.38 | 1098 | 0 | |
| SIOUX LOOKOUT | airport | Canada | 50.11 | -91.91 | 1258 | 0 | |
| SIOUX VALLEY HOSPITAL | airport | United States | 44.31 | -94.48 | 879 | 0 | |
| SIOV (Taua Airport) | airport | -16.90 | -39.16 | 44 | 0 | ||
| SIOW (Hospital Alemão Osvaldo Cruz Heliport) | airport | -23.57 | -46.64 | 2926 | 0 | ||
| SIOX (Centro de Distribuição Ponto Frio Heliport) | airport | -23.43 | -46.41 | 2540 | 0 | ||
| SIOY (Caravelas Heliport) | airport | -23.77 | -45.93 | 41 | 0 | ||
| SIOZ (Fazenda Santa Fé Airport) | airport | -9.59 | -50.36 | 591 | 0 |