| Port Huron to Chivasso | 4,233.02 mi (6,812.39 km) |
| Port Huron to Ciampino | 4,561.09 mi (7,340.36 km) |
| Port Huron to Cicciano | 4,675.59 mi (7,524.64 km) |
| Port Huron to Cingoli | 4,521.07 mi (7,275.96 km) |
| Port Huron to Cinisello Balsamo | 4,272.94 mi (6,876.63 km) |
| Port Huron to Cinisi | 4,735.94 mi (7,621.75 km) |
| Port Huron to Cirie | 4,219.67 mi (6,790.91 km) |
| Port Huron to Ciro Marina | 4,851.49 mi (7,807.72 km) |
| Port Huron to Cislago | 4,259.05 mi (6,854.28 km) |
| Port Huron to Cisterna di Latina | 4,579.21 mi (7,369.52 km) |
| Port Huron to Cisternino | 4,803.54 mi (7,730.56 km) |
| Port Huron to Citta di Castello | 4,477.98 mi (7,206.62 km) |
| Port Huron to Citta Sant'Angelo | 4,590.14 mi (7,387.12 km) |
| Port Huron to Cittadella | 4,371.16 mi (7,034.70 km) |
| Port Huron to Cittanova | 4,853.48 mi (7,810.93 km) |
