| California to Collegno | 4,163.43 mi (6,700.39 km) |
| California to Cologno al Serio | 4,240.45 mi (6,824.34 km) |
| California to Cologno Monzese | 4,223.93 mi (6,797.76 km) |
| California to Colorno | 4,290.53 mi (6,904.94 km) |
| California to Comacchio | 4,375.96 mi (7,042.43 km) |
| California to Comiso | 4,758.18 mi (7,657.55 km) |
| California to Como | 4,206.93 mi (6,770.41 km) |
| California to Concordia Sagittaria | 4,369.24 mi (7,031.61 km) |
| California to Concorezzo | 4,224.53 mi (6,798.72 km) |
| California to Conegliano | 4,341.88 mi (6,987.58 km) |
| California to Conselice | 4,366.89 mi (7,027.83 km) |
| California to Conselve | 4,344.82 mi (6,992.32 km) |
| California to Conversano | 4,722.33 mi (7,599.85 km) |
| California to Copertino | 4,789.70 mi (7,708.28 km) |
| California to Copparo | 4,354.29 mi (7,007.55 km) |
