| Olean to Collegno | 4,094.87 mi (6,590.06 km) |
| Olean to Cologno al Serio | 4,165.55 mi (6,703.81 km) |
| Olean to Cologno Monzese | 4,150.07 mi (6,678.89 km) |
| Olean to Colorno | 4,217.42 mi (6,787.27 km) |
| Olean to Comacchio | 4,300.48 mi (6,920.96 km) |
| Olean to Comiso | 4,711.64 mi (7,582.65 km) |
| Olean to Como | 4,132.08 mi (6,649.95 km) |
| Olean to Concordia Sagittaria | 4,287.64 mi (6,900.29 km) |
| Olean to Concorezzo | 4,150.27 mi (6,679.22 km) |
| Olean to Conegliano | 4,260.77 mi (6,857.04 km) |
| Olean to Conselice | 4,292.92 mi (6,908.79 km) |
| Olean to Conselve | 4,267.51 mi (6,867.89 km) |
| Olean to Conversano | 4,653.00 mi (7,488.27 km) |
| Olean to Copertino | 4,721.22 mi (7,598.07 km) |
| Olean to Copparo | 4,278.57 mi (6,885.69 km) |
