| Castle Rock to Collegno | 5,254.99 mi (8,457.08 km) |
| Castle Rock to Cologno al Serio | 5,306.44 mi (8,539.89 km) |
| Castle Rock to Cologno Monzese | 5,294.29 mi (8,520.33 km) |
| Castle Rock to Colorno | 5,361.55 mi (8,628.58 km) |
| Castle Rock to Comacchio | 5,435.47 mi (8,747.55 km) |
| Castle Rock to Comiso | 5,910.89 mi (9,512.67 km) |
| Castle Rock to Como | 5,274.17 mi (8,487.95 km) |
| Castle Rock to Concordia Sagittaria | 5,405.61 mi (8,699.49 km) |
| Castle Rock to Concorezzo | 5,293.40 mi (8,518.90 km) |
| Castle Rock to Conegliano | 5,381.04 mi (8,659.95 km) |
| Castle Rock to Conselice | 5,432.37 mi (8,742.55 km) |
| Castle Rock to Conselve | 5,398.40 mi (8,687.89 km) |
| Castle Rock to Conversano | 5,794.45 mi (9,325.27 km) |
| Castle Rock to Copertino | 5,863.06 mi (9,435.69 km) |
| Castle Rock to Copparo | 5,413.58 mi (8,712.31 km) |
