| Opovo to Castelfidardo | 357.76 mi (575.75 km) |
| Opovo to Castelfiorentino | 478.10 mi (769.43 km) |
| Opovo to Castelfranco di Sopra | 449.15 mi (722.84 km) |
| Opovo to Castelfranco di Sotto | 486.79 mi (783.41 km) |
| Opovo to Castelfranco Emilia | 460.37 mi (740.89 km) |
| Opovo to Castelfranco Veneto | 414.50 mi (667.08 km) |
| Opovo to Castellabate | 431.30 mi (694.10 km) |
| Opovo to Castellammare del Golfo | 622.36 mi (1,001.60 km) |
| Opovo to Castellammare di Stabia | 425.69 mi (685.08 km) |
| Opovo to Castellamonte | 618.78 mi (995.83 km) |
| Opovo to Castellana Grotte | 331.87 mi (534.09 km) |
| Opovo to Castellaneta | 352.89 mi (567.92 km) |
| Opovo to Castellanza | 560.90 mi (902.69 km) |
| Opovo to Castellarano | 473.79 mi (762.49 km) |
| Opovo to Castelleone | 519.58 mi (836.18 km) |
