| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| SIG (FERNANDO LUIS RIBAS DOMINICCI) | airport | United States | 18.46 | -66.10 | 10 | 0 | |
| SIG FIELD | airport | United States | 41.55 | -92.53 | 929 | 0 | |
| SIGA (Jardin Guanabara Heliport) | airport | -22.81 | -43.21 | 210 | 0 | ||
| SIGB (Morma II Heliport) | airport | -28.04 | -48.63 | 171 | 0 | ||
| SIGC (Porto Cubatão Heliport) | airport | -24.98 | -47.94 | 23 | 0 | ||
| SIGD (Gota Dourada Heliport) | airport | -21.01 | -47.66 | 2848 | 0 | ||
| SIGE (Lagoa do Cavalo Heliport) | airport | -8.17 | -35.64 | 1722 | 0 | ||
| SIGG (Auto Viação Reginas II Heliport) | airport | -22.66 | -43.05 | 66 | 0 | ||
| SIGH (Adalberto S. Monturil Heliport) | airport | -16.71 | -49.26 | 2759 | 0 | ||
| SIGI (Gabinete Militar Heliport) | airport | -16.68 | -49.26 | 2523 | 0 | ||
| SIGIRIYA | airport | Sri Lanka | 7.96 | 80.73 | 630 | 0 | |
| SIGJ (Hospital HCA Heliport) | airport | -22.92 | -43.19 | 103 | 0 | ||
| SIGK (CD Guarulhos Heliport) | airport | -23.45 | -46.44 | 2648 | 0 | ||
| SIGL (Fazenda Boa Sorte Airport) | airport | -21.92 | -53.52 | 1099 | 0 | ||
| SIGLUFJORDUR | airport | Iceland | 66.13 | -18.92 | 10 | 0 | |
| SIGM (Fazenda São Benedito Airport) | airport | -16.27 | -57.86 | 469 | 0 | ||
| SIGN (Asa Delta Airport) | airport | -15.57 | -53.23 | 1585 | 0 | ||
| SIGNAL PEAK LOOKOUT | airport | United States | 46.23 | -121.13 | 5111 | 0 | |
| SIGO (Fazenda Araguari Airport) | airport | -13.34 | -53.96 | 2126 | 0 | ||
| SIGONELLA | airport | Italy | 37.40 | 14.92 | 79 | 0 | |
| SIGQ (Companhia Siderúrgica Nacional Heliport) | airport | -22.50 | -44.08 | 1234 | 0 | ||
| SIGR (Região das Hortências Heliport) | airport | -29.36 | -50.85 | 2805 | 0 | ||
| SIGS (Fazenda Granja Santiago Airport) | airport | -17.16 | -46.66 | 1946 | 0 | ||
| SIGT (Fazenda Goiabeira Airport) | airport | -23.99 | -49.18 | 2260 | 0 | ||
| SIGU (Fazenda Café no Bule Airport) | airport | -19.82 | -53.83 | 2199 | 0 | ||
| SIGUANEA | airport | Cuba | 21.64 | -82.96 | 39 | 0 | |
| SIGV (Rede Record Heliport) | airport | -23.52 | -46.66 | 2412 | 0 | ||
| SIGW (Estância Miranda Airport) | airport | -21.91 | -57.14 | 640 | 0 | ||
| SIGX (Fazenda Gairova Airport) | airport | -11.20 | -58.24 | 1083 | 0 | ||
| SIGY (Fazenda Progresso Airport) | airport | -7.50 | -44.20 | 1476 | 0 | ||
| SIGZ (Banco de Boston II Heliport) | airport | -23.62 | -46.70 | 2830 | 0 |