| Port Huron to Cassina de' Pecchi | 4,280.24 mi (6,888.39 km) |
| Port Huron to Cassino | 4,624.24 mi (7,442.00 km) |
| Port Huron to Castagneto Carducci | 4,423.04 mi (7,118.20 km) |
| Port Huron to Castano Primo | 4,254.86 mi (6,847.53 km) |
| Port Huron to Castel Bolognese | 4,425.31 mi (7,121.85 km) |
| Port Huron to Castel Gandolfo | 4,565.43 mi (7,347.36 km) |
| Port Huron to Castel Goffredo | 4,333.14 mi (6,973.52 km) |
| Port Huron to Castel Maggiore | 4,397.88 mi (7,077.70 km) |
| Port Huron to Castel Mella | 4,312.24 mi (6,939.88 km) |
| Port Huron to Castel San Giorgio | 4,690.29 mi (7,548.29 km) |
| Port Huron to Castel San Giovanni | 4,301.03 mi (6,921.84 km) |
| Port Huron to Castel San Pietro Terme | 4,413.26 mi (7,102.46 km) |
| Port Huron to Castel Volturno | 4,646.75 mi (7,478.22 km) |
| Port Huron to Castelbuono | 4,788.45 mi (7,706.27 km) |
| Port Huron to Casteldaccia | 4,759.37 mi (7,659.47 km) |
