| Port Huron to Cognac | 3,874.69 mi (6,235.70 km) |
| Port Huron to Cogolin | 4,251.09 mi (6,841.47 km) |
| Port Huron to Colmar | 4,104.07 mi (6,604.86 km) |
| Port Huron to Colombes | 3,872.92 mi (6,232.87 km) |
| Port Huron to Colomiers | 4,017.72 mi (6,465.89 km) |
| Port Huron to Combs-la-Ville | 3,893.63 mi (6,266.20 km) |
| Port Huron to Comines | 3,842.49 mi (6,183.89 km) |
| Port Huron to Compiegne | 3,879.32 mi (6,243.16 km) |
| Port Huron to Concarneau | 3,654.47 mi (5,881.30 km) |
| Port Huron to Conde-sur-l'Escaut | 3,875.19 mi (6,236.52 km) |
| Port Huron to Conflans-Sainte-Honorine | 3,864.30 mi (6,218.98 km) |
| Port Huron to Corbas | 4,093.32 mi (6,587.57 km) |
| Port Huron to Corbeil-Essonnes | 3,892.39 mi (6,264.20 km) |
| Port Huron to Cormeilles-en-Parisis | 3,869.24 mi (6,226.94 km) |
| Port Huron to Cosne sur Loire | 3,951.00 mi (6,358.53 km) |
