| Alpena to Cognac | 3,837.34 mi (6,175.60 km) |
| Alpena to Cogolin | 4,211.96 mi (6,778.50 km) |
| Alpena to Colmar | 4,052.23 mi (6,521.44 km) |
| Alpena to Colombes | 3,824.22 mi (6,154.48 km) |
| Alpena to Colomiers | 3,983.96 mi (6,411.57 km) |
| Alpena to Combs-la-Ville | 3,845.29 mi (6,188.39 km) |
| Alpena to Comines | 3,788.18 mi (6,096.48 km) |
| Alpena to Compiegne | 3,828.75 mi (6,161.77 km) |
| Alpena to Concarneau | 3,614.83 mi (5,817.51 km) |
| Alpena to Conde-sur-l'Escaut | 3,821.15 mi (6,149.55 km) |
| Alpena to Conflans-Sainte-Honorine | 3,815.54 mi (6,140.52 km) |
| Alpena to Corbas | 4,050.18 mi (6,518.13 km) |
| Alpena to Corbeil-Essonnes | 3,844.27 mi (6,186.76 km) |
| Alpena to Cormeilles-en-Parisis | 3,820.45 mi (6,148.42 km) |
| Alpena to Cosne sur Loire | 3,905.58 mi (6,285.43 km) |
