| Opera to Collegno | 82.75 mi (133.18 km) |
| Opera to Cologno al Serio | 27.19 mi (43.75 km) |
| Opera to Cologno Monzese | 10.47 mi (16.86 km) |
| Opera to Colorno | 64.79 mi (104.26 km) |
| Opera to Comacchio | 152.32 mi (245.14 km) |
| Opera to Comiso | 646.09 mi (1,039.78 km) |
| Opera to Como | 30.17 mi (48.56 km) |
| Opera to Concordia Sagittaria | 177.69 mi (285.96 km) |
| Opera to Concorezzo | 15.39 mi (24.76 km) |
| Opera to Conegliano | 152.84 mi (245.96 km) |
| Opera to Conselice | 141.26 mi (227.33 km) |
| Opera to Conselve | 129.18 mi (207.90 km) |
| Opera to Conversano | 501.17 mi (806.55 km) |
| Opera to Copertino | 569.82 mi (917.03 km) |
| Opera to Copparo | 131.81 mi (212.13 km) |
