| Porterville to Cortona | 6,150.03 mi (9,897.51 km) |
| Porterville to Cosenza | 6,502.25 mi (10,464.36 km) |
| Porterville to Cossato | 5,908.46 mi (9,508.75 km) |
| Porterville to Costa Volpino | 5,953.83 mi (9,581.77 km) |
| Porterville to Creazzo | 6,011.47 mi (9,674.53 km) |
| Porterville to Crema | 5,966.05 mi (9,601.43 km) |
| Porterville to Cremona | 5,989.30 mi (9,638.85 km) |
| Porterville to Crevalcore | 6,045.86 mi (9,729.87 km) |
| Porterville to Crispiano | 6,457.57 mi (10,392.46 km) |
| Porterville to Crosia | 6,502.73 mi (10,465.14 km) |
| Porterville to Crotone | 6,540.87 mi (10,526.51 km) |
| Porterville to Cuneo | 5,951.18 mi (9,577.51 km) |
| Porterville to Cuorgne | 5,901.55 mi (9,497.62 km) |
| Porterville to Cusano Milanino | 5,940.89 mi (9,560.93 km) |
| Porterville to Cutro | 6,539.70 mi (10,524.63 km) |
