| Opmeer to Collegno | 539.87 mi (868.84 km) |
| Opmeer to Cologno al Serio | 536.25 mi (863.02 km) |
| Opmeer to Cologno Monzese | 532.52 mi (857.00 km) |
| Opmeer to Colorno | 590.41 mi (950.18 km) |
| Opmeer to Comacchio | 642.95 mi (1,034.73 km) |
| Opmeer to Comiso | 1,184.05 mi (1,905.55 km) |
| Opmeer to Como | 511.06 mi (822.46 km) |
| Opmeer to Concordia Sagittaria | 596.34 mi (959.72 km) |
| Opmeer to Concorezzo | 529.51 mi (852.17 km) |
| Opmeer to Conegliano | 574.87 mi (925.17 km) |
| Opmeer to Conselice | 646.29 mi (1,040.10 km) |
| Opmeer to Conselve | 603.18 mi (970.72 km) |
| Opmeer to Conversano | 991.06 mi (1,594.95 km) |
| Opmeer to Copertino | 1,057.78 mi (1,702.33 km) |
| Opmeer to Copparo | 622.71 mi (1,002.15 km) |
