| Port Huron to Cadiz | 3,928.75 mi (6,322.72 km) |
| Port Huron to Calafell | 4,115.65 mi (6,623.50 km) |
| Port Huron to Calahorra | 3,920.52 mi (6,309.46 km) |
| Port Huron to Calasparra | 4,079.53 mi (6,565.37 km) |
| Port Huron to Calatayud | 3,968.79 mi (6,387.15 km) |
| Port Huron to Caldas de Montbuy | 4,125.76 mi (6,639.77 km) |
| Port Huron to Caldas de Reyes | 3,612.59 mi (5,813.90 km) |
| Port Huron to Calella | 4,147.96 mi (6,675.50 km) |
| Port Huron to Callosa de Segura | 4,121.02 mi (6,632.14 km) |
| Port Huron to Calpe | 4,143.27 mi (6,667.96 km) |
| Port Huron to Calvia | 4,218.54 mi (6,789.09 km) |
| Port Huron to Camas | 3,909.61 mi (6,291.90 km) |
| Port Huron to Cambados | 3,608.55 mi (5,807.40 km) |
| Port Huron to Cambre | 3,604.84 mi (5,801.43 km) |
| Port Huron to Cambrils | 4,098.04 mi (6,595.16 km) |
