| Opmeer to Cividale del Friuli | 593.70 mi (955.47 km) |
| Opmeer to Civita Castellana | 797.73 mi (1,283.83 km) |
| Opmeer to Civitanova Marche | 764.72 mi (1,230.70 km) |
| Opmeer to Civitavecchia | 798.51 mi (1,285.08 km) |
| Opmeer to Civitella in Val di Chiana | 712.73 mi (1,147.03 km) |
| Opmeer to Clusone | 521.80 mi (839.76 km) |
| Opmeer to Coccaglio | 542.65 mi (873.31 km) |
| Opmeer to Codigoro | 633.29 mi (1,019.18 km) |
| Opmeer to Codogno | 563.60 mi (907.02 km) |
| Opmeer to Codroipo | 588.66 mi (947.36 km) |
| Opmeer to Cogoleto | 598.37 mi (962.99 km) |
| Opmeer to Colle di Val d'Elsa | 702.54 mi (1,130.63 km) |
| Opmeer to Colle Salvetti | 678.02 mi (1,091.17 km) |
| Opmeer to Collecchio | 599.06 mi (964.09 km) |
| Opmeer to Colleferro | 845.79 mi (1,361.17 km) |
