| Port Huron to Corato | 4,743.60 mi (7,634.08 km) |
| Port Huron to Corbetta | 4,264.09 mi (6,862.39 km) |
| Port Huron to Corciano | 4,493.00 mi (7,230.79 km) |
| Port Huron to Cordenons | 4,393.81 mi (7,071.15 km) |
| Port Huron to Cori | 4,580.43 mi (7,371.49 km) |
| Port Huron to Coriano | 4,471.62 mi (7,196.37 km) |
| Port Huron to Corigliano Calabro | 4,816.25 mi (7,751.01 km) |
| Port Huron to Corleone | 4,759.54 mi (7,659.74 km) |
| Port Huron to Cormano | 4,270.93 mi (6,873.40 km) |
| Port Huron to Cornaredo | 4,267.50 mi (6,867.88 km) |
| Port Huron to Cornate d'Adda | 4,279.09 mi (6,886.54 km) |
| Port Huron to Cornedo Vicentino | 4,355.36 mi (7,009.27 km) |
| Port Huron to Correggio | 4,366.31 mi (7,026.89 km) |
| Port Huron to Corridonia | 4,537.97 mi (7,303.16 km) |
| Port Huron to Corsico | 4,273.43 mi (6,877.41 km) |
