| Olney to Cividale del Friuli | 4,369.92 mi (7,032.71 km) |
| Olney to Civita Castellana | 4,458.60 mi (7,175.43 km) |
| Olney to Civitanova Marche | 4,480.51 mi (7,210.68 km) |
| Olney to Civitavecchia | 4,438.67 mi (7,143.34 km) |
| Olney to Civitella in Val di Chiana | 4,389.14 mi (7,063.64 km) |
| Olney to Clusone | 4,230.64 mi (6,808.56 km) |
| Olney to Coccaglio | 4,242.23 mi (6,827.22 km) |
| Olney to Codigoro | 4,357.76 mi (7,013.13 km) |
| Olney to Codogno | 4,243.67 mi (6,829.52 km) |
| Olney to Codroipo | 4,355.68 mi (7,009.80 km) |
| Olney to Cogoleto | 4,222.87 mi (6,796.06 km) |
| Olney to Colle di Val d'Elsa | 4,364.32 mi (7,023.69 km) |
| Olney to Colle Salvetti | 4,329.16 mi (6,967.10 km) |
| Olney to Collecchio | 4,279.14 mi (6,886.61 km) |
| Olney to Colleferro | 4,505.34 mi (7,250.65 km) |
