| Opmeer to Cortona | 727.15 mi (1,170.23 km) |
| Opmeer to Cosenza | 1,070.13 mi (1,722.21 km) |
| Opmeer to Cossato | 513.73 mi (826.77 km) |
| Opmeer to Costa Volpino | 528.04 mi (849.80 km) |
| Opmeer to Creazzo | 576.08 mi (927.11 km) |
| Opmeer to Crema | 549.88 mi (884.95 km) |
| Opmeer to Cremona | 571.14 mi (919.16 km) |
| Opmeer to Crevalcore | 619.26 mi (996.61 km) |
| Opmeer to Crispiano | 1,015.94 mi (1,635.01 km) |
| Opmeer to Crosia | 1,066.29 mi (1,716.03 km) |
| Opmeer to Crotone | 1,104.56 mi (1,777.61 km) |
| Opmeer to Cuneo | 586.70 mi (944.21 km) |
| Opmeer to Cuorgne | 519.58 mi (836.19 km) |
| Opmeer to Cusano Milanino | 529.57 mi (852.26 km) |
| Opmeer to Cutro | 1,104.33 mi (1,777.25 km) |
