| Olean to Cividale del Friuli | 4,298.64 mi (6,917.99 km) |
| Olean to Civita Castellana | 4,401.80 mi (7,084.01 km) |
| Olean to Civitanova Marche | 4,418.23 mi (7,110.45 km) |
| Olean to Civitavecchia | 4,383.50 mi (7,054.57 km) |
| Olean to Civitella in Val di Chiana | 4,329.60 mi (6,967.81 km) |
| Olean to Clusone | 4,165.07 mi (6,703.04 km) |
| Olean to Coccaglio | 4,177.76 mi (6,723.45 km) |
| Olean to Codigoro | 4,292.73 mi (6,908.48 km) |
| Olean to Codogno | 4,181.02 mi (6,728.70 km) |
| Olean to Codroipo | 4,285.52 mi (6,896.88 km) |
| Olean to Cogoleto | 4,164.52 mi (6,702.15 km) |
| Olean to Colle di Val d'Elsa | 4,305.72 mi (6,929.39 km) |
| Olean to Colle Salvetti | 4,270.86 mi (6,873.29 km) |
| Olean to Collecchio | 4,217.20 mi (6,786.93 km) |
| Olean to Colleferro | 4,449.46 mi (7,160.72 km) |
