| Port Huron to Carrollwood (Florida) | 1,031.18 mi (1,659.53 km) |
| Port Huron to Carson (California) | 2,021.95 mi (3,254.02 km) |
| Port Huron to Carson City (Nevada) | 1,945.27 mi (3,130.60 km) |
| Port Huron to Carteret (New Jersey) | 454.03 mi (730.69 km) |
| Port Huron to Cartersville (Georgia) | 622.39 mi (1,001.63 km) |
| Port Huron to Carthage (Missouri) | 745.36 mi (1,199.54 km) |
| Port Huron to Cary (Illinois) | 300.21 mi (483.14 km) |
| Port Huron to Cary (North Carolina) | 533.57 mi (858.70 km) |
| Port Huron to Casa de Oro-Mount Helix (California) | 1,994.35 mi (3,209.59 km) |
| Port Huron to Casa Grande (Arizona) | 1,731.32 mi (2,786.29 km) |
| Port Huron to Casas Adobes (Arizona) | 1,715.82 mi (2,761.34 km) |
| Port Huron to Cascades (Virginia) | 378.41 mi (608.99 km) |
| Port Huron to Casper (Wyoming) | 1,204.47 mi (1,938.41 km) |
| Port Huron to Casselberry (Florida) | 991.35 mi (1,595.42 km) |
| Port Huron to Castaic (California) | 2,019.73 mi (3,250.44 km) |
