| Olen to Ciampino | 742.91 mi (1,195.60 km) |
| Olen to Cicciano | 841.38 mi (1,354.08 km) |
| Olen to Cingoli | 664.77 mi (1,069.84 km) |
| Olen to Cinisello Balsamo | 435.60 mi (701.03 km) |
| Olen to Cinisi | 982.95 mi (1,581.91 km) |
| Olen to Cirie | 427.77 mi (688.43 km) |
| Olen to Ciro Marina | 1,006.62 mi (1,620.01 km) |
| Olen to Cislago | 424.18 mi (682.66 km) |
| Olen to Cisterna di Latina | 761.14 mi (1,224.93 km) |
| Olen to Cisternino | 937.30 mi (1,508.44 km) |
| Olen to Citta di Castello | 633.52 mi (1,019.55 km) |
| Olen to Citta Sant'Angelo | 736.97 mi (1,186.04 km) |
| Olen to Cittadella | 495.10 mi (796.79 km) |
| Olen to Cittanova | 1,039.47 mi (1,672.86 km) |
| Olen to Cividale del Friuli | 524.18 mi (843.58 km) |
