| Port Huron to Carlsbad (California) | 1,997.43 mi (3,214.56 km) |
| Port Huron to Carlsbad (New Mexico) | 1,391.89 mi (2,240.03 km) |
| Port Huron to Carmel (Indiana) | 283.29 mi (455.91 km) |
| Port Huron to Carmichael (California) | 2,037.35 mi (3,278.80 km) |
| Port Huron to Carney (Maryland) | 394.38 mi (634.69 km) |
| Port Huron to Carnot-Moon (Pennsylvania) | 205.11 mi (330.09 km) |
| Port Huron to Carol Stream (Illinois) | 299.28 mi (481.65 km) |
| Port Huron to Carolina (Puerto Rico) | 1,951.31 mi (3,140.34 km) |
| Port Huron to Carolina Forest (South Carolina) | 664.68 mi (1,069.70 km) |
| Port Huron to Carpentersville (Illinois) | 303.59 mi (488.58 km) |
| Port Huron to Carpinteria (California) | 2,066.85 mi (3,326.28 km) |
| Port Huron to Carrboro (North Carolina) | 519.16 mi (835.50 km) |
| Port Huron to Carroll (Iowa) | 635.26 mi (1,022.35 km) |
| Port Huron to Carrollton (Georgia) | 665.05 mi (1,070.30 km) |
| Port Huron to Carrollton (Texas) | 1,044.60 mi (1,681.12 km) |
