| Opoczno to Busto Arsizio | 656.65 mi (1,056.77 km) |
| Opoczno to Busto Garolfo | 658.33 mi (1,059.48 km) |
| Opoczno to Cabras | 970.77 mi (1,562.30 km) |
| Opoczno to Cadelbosco di Sopra | 638.21 mi (1,027.10 km) |
| Opoczno to Cadoneghe | 560.09 mi (901.38 km) |
| Opoczno to Cagli | 647.09 mi (1,041.38 km) |
| Opoczno to Cagliari | 997.33 mi (1,605.04 km) |
| Opoczno to Cairo Montenotte | 734.94 mi (1,182.78 km) |
| Opoczno to Caivano | 774.68 mi (1,246.72 km) |
| Opoczno to Calcinaia | 696.03 mi (1,120.14 km) |
| Opoczno to Calcinato | 609.13 mi (980.31 km) |
| Opoczno to Calderara di Reno | 627.99 mi (1,010.64 km) |
| Opoczno to Caldogno | 566.22 mi (911.24 km) |
| Opoczno to Calenzano | 669.54 mi (1,077.52 km) |
| Opoczno to Calolziocorte | 627.05 mi (1,009.13 km) |
