| Opoczno to Celano | 715.96 mi (1,152.23 km) |
| Opoczno to Cento | 618.48 mi (995.34 km) |
| Opoczno to Cepagatti | 687.81 mi (1,106.92 km) |
| Opoczno to Ceprano | 750.79 mi (1,208.28 km) |
| Opoczno to Cercola | 779.24 mi (1,254.06 km) |
| Opoczno to Cerea | 595.85 mi (958.92 km) |
| Opoczno to Cerese | 618.65 mi (995.63 km) |
| Opoczno to Cerignola | 728.91 mi (1,173.07 km) |
| Opoczno to Cermenate | 644.24 mi (1,036.81 km) |
| Opoczno to Cernusco sul Naviglio | 643.81 mi (1,036.10 km) |
| Opoczno to Cerreto Guidi | 683.46 mi (1,099.92 km) |
| Opoczno to Cerro Maggiore | 653.65 mi (1,051.94 km) |
| Opoczno to Certaldo | 691.10 mi (1,112.22 km) |
| Opoczno to Cerveteri | 754.14 mi (1,213.67 km) |
| Opoczno to Cervia | 613.50 mi (987.33 km) |
