| Onda to Cividale del Friuli | 809.74 mi (1,303.15 km) |
| Onda to Civita Castellana | 678.30 mi (1,091.61 km) |
| Onda to Civitanova Marche | 757.66 mi (1,219.33 km) |
| Onda to Civitavecchia | 645.29 mi (1,038.49 km) |
| Onda to Civitella in Val di Chiana | 661.86 mi (1,065.17 km) |
| Onda to Clusone | 658.20 mi (1,059.27 km) |
| Onda to Coccaglio | 646.98 mi (1,041.21 km) |
| Onda to Codigoro | 714.68 mi (1,150.16 km) |
| Onda to Codogno | 620.82 mi (999.12 km) |
| Onda to Codroipo | 786.02 mi (1,264.97 km) |
| Onda to Cogoleto | 548.77 mi (883.17 km) |
| Onda to Colle di Val d'Elsa | 633.60 mi (1,019.68 km) |
| Onda to Colle Salvetti | 607.47 mi (977.63 km) |
| Onda to Collecchio | 628.35 mi (1,011.23 km) |
| Onda to Colleferro | 704.07 mi (1,133.10 km) |
