| Opera to Castelfidardo | 251.39 mi (404.57 km) |
| Opera to Castelfiorentino | 150.40 mi (242.04 km) |
| Opera to Castelfranco di Sopra | 167.61 mi (269.74 km) |
| Opera to Castelfranco di Sotto | 138.66 mi (223.15 km) |
| Opera to Castelfranco Emilia | 104.89 mi (168.81 km) |
| Opera to Castelfranco Veneto | 132.94 mi (213.95 km) |
| Opera to Castellabate | 456.76 mi (735.08 km) |
| Opera to Castellammare del Golfo | 542.15 mi (872.51 km) |
| Opera to Castellammare di Stabia | 418.85 mi (674.07 km) |
| Opera to Castellamonte | 73.02 mi (117.51 km) |
| Opera to Castellana Grotte | 506.89 mi (815.76 km) |
| Opera to Castellaneta | 509.21 mi (819.50 km) |
| Opera to Castellanza | 22.26 mi (35.82 km) |
| Opera to Castellarano | 95.11 mi (153.07 km) |
| Opera to Castelleone | 27.11 mi (43.63 km) |
