| Detroit to Collegno | 4,276.24 mi (6,881.94 km) |
| Detroit to Cologno al Serio | 4,343.03 mi (6,989.43 km) |
| Detroit to Cologno Monzese | 4,328.21 mi (6,965.57 km) |
| Detroit to Colorno | 4,395.80 mi (7,074.35 km) |
| Detroit to Comacchio | 4,477.23 mi (7,205.40 km) |
| Detroit to Comiso | 4,903.44 mi (7,891.32 km) |
| Detroit to Como | 4,309.69 mi (6,935.77 km) |
| Detroit to Concordia Sagittaria | 4,460.72 mi (7,178.83 km) |
| Detroit to Concorezzo | 4,328.17 mi (6,965.52 km) |
| Detroit to Conegliano | 4,434.22 mi (7,136.19 km) |
| Detroit to Conselice | 4,470.59 mi (7,194.72 km) |
| Detroit to Conselve | 4,443.25 mi (7,150.73 km) |
| Detroit to Conversano | 4,832.43 mi (7,777.04 km) |
| Detroit to Copertino | 4,900.97 mi (7,887.35 km) |
| Detroit to Copparo | 4,455.24 mi (7,170.01 km) |
