| Alpena to Coudekerque-Branche | 3,755.79 mi (6,044.36 km) |
| Alpena to Coueron | 3,726.43 mi (5,997.11 km) |
| Alpena to Coulommiers | 3,860.36 mi (6,212.66 km) |
| Alpena to Courbevoic | 3,825.17 mi (6,156.02 km) |
| Alpena to Courcouronnes | 3,841.86 mi (6,182.88 km) |
| Alpena to Cournon-d'Auvergne | 3,978.98 mi (6,403.55 km) |
| Alpena to Courrieres | 3,796.52 mi (6,109.90 km) |
| Alpena to Coutras | 3,869.56 mi (6,227.46 km) |
| Alpena to Couzeix | 3,894.74 mi (6,267.98 km) |
| Alpena to Cran-Gevrier | 4,088.73 mi (6,580.18 km) |
| Alpena to Craponne | 4,040.05 mi (6,501.84 km) |
| Alpena to Creil | 3,821.23 mi (6,149.68 km) |
| Alpena to Crepy-en-Valois | 3,837.69 mi (6,176.16 km) |
| Alpena to Crest | 4,091.77 mi (6,585.07 km) |
| Alpena to Creteil | 3,837.15 mi (6,175.30 km) |
