| Portes-les-Valence to Ciampino | 442.16 mi (711.58 km) |
| Portes-les-Valence to Cicciano | 557.68 mi (897.50 km) |
| Portes-les-Valence to Cingoli | 426.37 mi (686.17 km) |
| Portes-les-Valence to Cinisello Balsamo | 216.35 mi (348.18 km) |
| Portes-les-Valence to Cinisi | 628.39 mi (1,011.30 km) |
| Portes-les-Valence to Cirie | 135.28 mi (217.71 km) |
| Portes-les-Valence to Ciro Marina | 732.87 mi (1,179.45 km) |
| Portes-les-Valence to Cislago | 206.01 mi (331.54 km) |
| Portes-les-Valence to Cisterna di Latina | 459.78 mi (739.95 km) |
| Portes-les-Valence to Cisternino | 696.88 mi (1,121.51 km) |
| Portes-les-Valence to Citta di Castello | 377.81 mi (608.02 km) |
| Portes-les-Valence to Citta Sant'Angelo | 486.01 mi (782.16 km) |
| Portes-les-Valence to Cittadella | 340.05 mi (547.26 km) |
| Portes-les-Valence to Cittanova | 732.54 mi (1,178.91 km) |
| Portes-les-Valence to Cividale del Friuli | 422.85 mi (680.50 km) |
