| Opmeer to Castelfidardo | 750.25 mi (1,207.41 km) |
| Opmeer to Castelfiorentino | 686.62 mi (1,105.01 km) |
| Opmeer to Castelfranco di Sopra | 696.46 mi (1,120.84 km) |
| Opmeer to Castelfranco di Sotto | 676.24 mi (1,088.30 km) |
| Opmeer to Castelfranco Emilia | 624.82 mi (1,005.56 km) |
| Opmeer to Castelfranco Veneto | 578.72 mi (931.36 km) |
| Opmeer to Castellabate | 979.18 mi (1,575.84 km) |
| Opmeer to Castellammare del Golfo | 1,082.90 mi (1,742.76 km) |
| Opmeer to Castellammare di Stabia | 942.59 mi (1,516.96 km) |
| Opmeer to Castellamonte | 520.77 mi (838.09 km) |
| Opmeer to Castellana Grotte | 997.34 mi (1,605.06 km) |
| Opmeer to Castellaneta | 1,006.02 mi (1,619.04 km) |
| Opmeer to Castellanza | 520.74 mi (838.04 km) |
| Opmeer to Castellarano | 621.39 mi (1,000.03 km) |
| Opmeer to Castelleone | 555.81 mi (894.50 km) |
