| Port Huron to Castle Pines (Colorado) | 1,187.07 mi (1,910.41 km) |
| Port Huron to Castle Rock (Colorado) | 1,188.17 mi (1,912.17 km) |
| Port Huron to Castro Valley (California) | 2,098.23 mi (3,376.77 km) |
| Port Huron to Catalina Foothills (Arizona) | 1,711.06 mi (2,753.69 km) |
| Port Huron to Cataño (Puerto Rico) | 1,944.60 mi (3,129.53 km) |
| Port Huron to Cathedral City (California) | 1,932.07 mi (3,109.37 km) |
| Port Huron to Catonsville (Maryland) | 392.10 mi (631.03 km) |
| Port Huron to Cave Spring (Virginia) | 417.94 mi (672.61 km) |
| Port Huron to Cayce (South Carolina) | 628.86 mi (1,012.06 km) |
| Port Huron to Cayey (Puerto Rico) | 1,964.15 mi (3,160.99 km) |
| Port Huron to Cedar City (Utah) | 1,645.90 mi (2,648.81 km) |
| Port Huron to Cedar Falls (Iowa) | 508.81 mi (818.86 km) |
| Port Huron to Cedar Hill (Texas) | 1,067.27 mi (1,717.61 km) |
| Port Huron to Cedar Lake (Indiana) | 279.16 mi (449.26 km) |
| Port Huron to Cedar Mill (Oregon) | 1,983.92 mi (3,192.81 km) |
