| Boulogne-Billancourt to Ciampino | 698.53 mi (1,124.17 km) |
| Boulogne-Billancourt to Cicciano | 809.03 mi (1,302.01 km) |
| Boulogne-Billancourt to Cingoli | 646.48 mi (1,040.41 km) |
| Boulogne-Billancourt to Cinisello Balsamo | 398.23 mi (640.90 km) |
| Boulogne-Billancourt to Cinisi | 914.30 mi (1,471.42 km) |
| Boulogne-Billancourt to Cirie | 354.18 mi (569.99 km) |
| Boulogne-Billancourt to Ciro Marina | 983.40 mi (1,582.63 km) |
| Boulogne-Billancourt to Cislago | 384.43 mi (618.69 km) |
| Boulogne-Billancourt to Cisterna di Latina | 717.14 mi (1,154.13 km) |
| Boulogne-Billancourt to Cisternino | 929.06 mi (1,495.18 km) |
| Boulogne-Billancourt to Citta di Castello | 605.10 mi (973.81 km) |
| Boulogne-Billancourt to Citta Sant'Angelo | 716.69 mi (1,153.41 km) |
| Boulogne-Billancourt to Cittadella | 498.30 mi (801.94 km) |
| Boulogne-Billancourt to Cittanova | 999.28 mi (1,608.19 km) |
| Boulogne-Billancourt to Cividale del Friuli | 555.24 mi (893.58 km) |
