| Olsztyn to Cividale del Friuli | 615.42 mi (990.42 km) |
| Olsztyn to Civita Castellana | 875.21 mi (1,408.51 km) |
| Olsztyn to Civitanova Marche | 786.12 mi (1,265.14 km) |
| Olsztyn to Civitavecchia | 899.79 mi (1,448.07 km) |
| Olsztyn to Civitella in Val di Chiana | 818.84 mi (1,317.80 km) |
| Olsztyn to Clusone | 718.03 mi (1,155.55 km) |
| Olsztyn to Coccaglio | 735.06 mi (1,182.96 km) |
| Olsztyn to Codigoro | 722.67 mi (1,163.03 km) |
| Olsztyn to Codogno | 765.46 mi (1,231.88 km) |
| Olsztyn to Codroipo | 634.14 mi (1,020.55 km) |
| Olsztyn to Cogoleto | 838.89 mi (1,350.06 km) |
| Olsztyn to Colle di Val d'Elsa | 833.02 mi (1,340.62 km) |
| Olsztyn to Colle Salvetti | 836.31 mi (1,345.91 km) |
| Olsztyn to Collecchio | 775.00 mi (1,247.24 km) |
| Olsztyn to Colleferro | 900.31 mi (1,448.91 km) |
