| Os to Collegno | 1,050.27 mi (1,690.25 km) |
| Os to Cologno al Serio | 1,026.45 mi (1,651.92 km) |
| Os to Cologno Monzese | 1,027.43 mi (1,653.50 km) |
| Os to Colorno | 1,075.86 mi (1,731.42 km) |
| Os to Comacchio | 1,107.97 mi (1,783.11 km) |
| Os to Comiso | 1,657.86 mi (2,668.07 km) |
| Os to Como | 1,006.95 mi (1,620.54 km) |
| Os to Concordia Sagittaria | 1,043.56 mi (1,679.44 km) |
| Os to Concorezzo | 1,023.61 mi (1,647.34 km) |
| Os to Conegliano | 1,029.19 mi (1,656.32 km) |
| Os to Conselice | 1,116.86 mi (1,797.42 km) |
| Os to Conselve | 1,068.70 mi (1,719.91 km) |
| Os to Conversano | 1,420.41 mi (2,285.93 km) |
| Os to Copertino | 1,480.92 mi (2,383.30 km) |
| Os to Copparo | 1,090.91 mi (1,755.65 km) |
