| West Islip to Cividale del Friuli | 4,146.03 mi (6,672.39 km) |
| West Islip to Civita Castellana | 4,232.52 mi (6,811.59 km) |
| West Islip to Civitanova Marche | 4,255.10 mi (6,847.92 km) |
| West Islip to Civitavecchia | 4,212.42 mi (6,779.24 km) |
| West Islip to Civitella in Val di Chiana | 4,163.40 mi (6,700.34 km) |
| West Islip to Clusone | 4,005.80 mi (6,446.71 km) |
| West Islip to Coccaglio | 4,017.21 mi (6,465.08 km) |
| West Islip to Codigoro | 4,132.79 mi (6,651.08 km) |
| West Islip to Codogno | 4,018.37 mi (6,466.95 km) |
| West Islip to Codroipo | 4,131.59 mi (6,649.14 km) |
| West Islip to Cogoleto | 3,997.02 mi (6,432.58 km) |
| West Islip to Colle di Val d'Elsa | 4,138.46 mi (6,660.21 km) |
| West Islip to Colle Salvetti | 4,103.27 mi (6,603.58 km) |
| West Islip to Collecchio | 4,053.74 mi (6,523.86 km) |
| West Islip to Colleferro | 4,279.16 mi (6,886.64 km) |
