| Port Huron to Cehegin | 4,080.16 mi (6,566.38 km) |
| Port Huron to Cervello | 4,125.44 mi (6,639.26 km) |
| Port Huron to Cervera | 4,085.42 mi (6,574.85 km) |
| Port Huron to Ceuti | 4,104.75 mi (6,605.96 km) |
| Port Huron to Cheste | 4,079.20 mi (6,564.84 km) |
| Port Huron to Chiclana de la Frontera | 3,940.04 mi (6,340.88 km) |
| Port Huron to Chipiona | 3,915.12 mi (6,300.78 km) |
| Port Huron to Chiva | 4,077.92 mi (6,562.78 km) |
| Port Huron to Churriana de la Vega | 4,029.90 mi (6,485.50 km) |
| Port Huron to Ciempozuelos | 3,922.04 mi (6,311.91 km) |
| Port Huron to Cieza | 4,092.05 mi (6,585.52 km) |
| Port Huron to Cisterniga | 3,823.23 mi (6,152.90 km) |
| Port Huron to Ciudad de Melilla | 4,133.18 mi (6,651.71 km) |
| Port Huron to Ciudad Real | 3,950.50 mi (6,357.71 km) |
| Port Huron to Ciudad-Rodrigo | 3,773.97 mi (6,073.61 km) |
