| Opoczno to Caltagirone | 1,017.02 mi (1,636.73 km) |
| Opoczno to Caltanissetta | 1,006.52 mi (1,619.84 km) |
| Opoczno to Calvisano | 616.87 mi (992.76 km) |
| Opoczno to Calvizzano | 779.98 mi (1,255.26 km) |
| Opoczno to Camaiore | 692.00 mi (1,113.66 km) |
| Opoczno to Cameri | 669.09 mi (1,076.79 km) |
| Opoczno to Camisano Vicentino | 563.40 mi (906.71 km) |
| Opoczno to Campagna | 780.24 mi (1,255.68 km) |
| Opoczno to Campagnano di Roma | 739.22 mi (1,189.66 km) |
| Opoczno to Campi Bisenzio | 673.31 mi (1,083.59 km) |
| Opoczno to Campi Salentina | 766.17 mi (1,233.03 km) |
| Opoczno to Campiglia Marittima | 730.57 mi (1,175.73 km) |
| Opoczno to Campobasso | 728.15 mi (1,171.84 km) |
| Opoczno to Campobello di Licata | 1,024.67 mi (1,649.04 km) |
| Opoczno to Campobello di Mazara | 1,018.34 mi (1,638.85 km) |
