| West Islip to Cortona | 4,180.07 mi (6,727.18 km) |
| West Islip to Cosenza | 4,512.45 mi (7,262.09 km) |
| West Islip to Cossato | 3,939.10 mi (6,339.37 km) |
| West Islip to Costa Volpino | 4,013.85 mi (6,459.66 km) |
| West Islip to Creazzo | 4,082.50 mi (6,570.15 km) |
| West Islip to Crema | 4,010.82 mi (6,454.79 km) |
| West Islip to Cremona | 4,033.39 mi (6,491.11 km) |
| West Islip to Crevalcore | 4,095.14 mi (6,590.49 km) |
| West Islip to Crispiano | 4,506.45 mi (7,252.43 km) |
| West Islip to Crosia | 4,525.27 mi (7,282.71 km) |
| West Islip to Crotone | 4,559.38 mi (7,337.61 km) |
| West Islip to Cuneo | 3,949.12 mi (6,355.49 km) |
| West Islip to Cuorgne | 3,922.17 mi (6,312.13 km) |
| West Islip to Cusano Milanino | 3,983.48 mi (6,410.79 km) |
| West Islip to Cutro | 4,555.35 mi (7,331.12 km) |
