| Olecko to Cividale del Friuli | 678.67 mi (1,092.21 km) |
| Olecko to Civita Castellana | 932.72 mi (1,501.07 km) |
| Olecko to Civitanova Marche | 841.15 mi (1,353.71 km) |
| Olecko to Civitavecchia | 958.82 mi (1,543.07 km) |
| Olecko to Civitella in Val di Chiana | 880.82 mi (1,417.55 km) |
| Olecko to Clusone | 790.45 mi (1,272.11 km) |
| Olecko to Coccaglio | 806.64 mi (1,298.16 km) |
| Olecko to Codigoro | 786.77 mi (1,266.19 km) |
| Olecko to Codogno | 836.69 mi (1,346.52 km) |
| Olecko to Codroipo | 698.55 mi (1,124.21 km) |
| Olecko to Cogoleto | 910.65 mi (1,465.54 km) |
| Olecko to Colle di Val d'Elsa | 896.66 mi (1,443.03 km) |
| Olecko to Colle Salvetti | 902.14 mi (1,451.86 km) |
| Olecko to Collecchio | 844.09 mi (1,358.43 km) |
| Olecko to Colleferro | 954.79 mi (1,536.58 km) |
