| Williamsport to Cortona | 4,320.73 mi (6,953.54 km) |
| Williamsport to Cosenza | 4,657.43 mi (7,495.41 km) |
| Williamsport to Cossato | 4,077.89 mi (6,562.73 km) |
| Williamsport to Costa Volpino | 4,150.08 mi (6,678.90 km) |
| Williamsport to Creazzo | 4,218.11 mi (6,788.39 km) |
| Williamsport to Crema | 4,148.65 mi (6,676.61 km) |
| Williamsport to Cremona | 4,171.47 mi (6,713.33 km) |
| Williamsport to Crevalcore | 4,233.14 mi (6,812.58 km) |
| Williamsport to Crispiano | 4,647.49 mi (7,479.41 km) |
| Williamsport to Crosia | 4,669.09 mi (7,514.17 km) |
| Williamsport to Crotone | 4,703.82 mi (7,570.07 km) |
| Williamsport to Cuneo | 4,091.51 mi (6,584.65 km) |
| Williamsport to Cuorgne | 4,061.91 mi (6,537.01 km) |
| Williamsport to Cusano Milanino | 4,121.33 mi (6,632.64 km) |
| Williamsport to Cutro | 4,700.06 mi (7,564.01 km) |
