| Portet-sur-Garonne to Cosenza | 821.22 mi (1,321.63 km) |
| Portet-sur-Garonne to Cossato | 361.50 mi (581.78 km) |
| Portet-sur-Garonne to Costa Volpino | 455.63 mi (733.26 km) |
| Portet-sur-Garonne to Creazzo | 515.07 mi (828.92 km) |
| Portet-sur-Garonne to Crema | 427.50 mi (687.99 km) |
| Portet-sur-Garonne to Cremona | 440.46 mi (708.86 km) |
| Portet-sur-Garonne to Crevalcore | 490.00 mi (788.58 km) |
| Portet-sur-Garonne to Crispiano | 835.19 mi (1,344.11 km) |
| Portet-sur-Garonne to Crosia | 838.53 mi (1,349.49 km) |
| Portet-sur-Garonne to Crotone | 869.54 mi (1,399.40 km) |
| Portet-sur-Garonne to Cuneo | 311.27 mi (500.94 km) |
| Portet-sur-Garonne to Cuorgne | 333.76 mi (537.13 km) |
| Portet-sur-Garonne to Cusano Milanino | 407.65 mi (656.05 km) |
| Portet-sur-Garonne to Cutro | 864.59 mi (1,391.42 km) |
| Portet-sur-Garonne to Cutrofiano | 894.43 mi (1,439.45 km) |
