| Port Huron to Carmignano | 4,413.87 mi (7,103.44 km) |
| Port Huron to Carovigno | 4,814.41 mi (7,748.04 km) |
| Port Huron to Carpenedolo | 4,328.79 mi (6,966.51 km) |
| Port Huron to Carpi | 4,369.85 mi (7,032.59 km) |
| Port Huron to Carrara | 4,366.17 mi (7,026.68 km) |
| Port Huron to Carugate | 4,277.62 mi (6,884.16 km) |
| Port Huron to Casal di Principe | 4,657.06 mi (7,494.82 km) |
| Port Huron to Casale Monferrato | 4,258.36 mi (6,853.17 km) |
| Port Huron to Casale sul Sile | 4,394.83 mi (7,072.79 km) |
| Port Huron to Casalecchio di Reno | 4,397.87 mi (7,077.69 km) |
| Port Huron to Casalgrande | 4,371.77 mi (7,035.69 km) |
| Port Huron to Casalmaggiore | 4,343.03 mi (6,989.43 km) |
| Port Huron to Casalnuovo di Napoli | 4,670.22 mi (7,515.99 km) |
| Port Huron to Casalpusterlengo | 4,304.78 mi (6,927.88 km) |
| Port Huron to Casaluce | 4,660.51 mi (7,500.37 km) |
