| Helmstedt to Coudekerque-Branche | 378.66 mi (609.39 km) |
| Helmstedt to Coueron | 664.54 mi (1,069.48 km) |
| Helmstedt to Coulommiers | 420.17 mi (676.19 km) |
| Helmstedt to Courbevoic | 447.54 mi (720.24 km) |
| Helmstedt to Courcouronnes | 451.97 mi (727.38 km) |
| Helmstedt to Cournon-d'Auvergne | 570.58 mi (918.26 km) |
| Helmstedt to Courrieres | 368.64 mi (593.26 km) |
| Helmstedt to Coutras | 709.37 mi (1,141.63 km) |
| Helmstedt to Couzeix | 622.21 mi (1,001.35 km) |
| Helmstedt to Cran-Gevrier | 489.92 mi (788.45 km) |
| Helmstedt to Craponne | 530.49 mi (853.74 km) |
| Helmstedt to Creil | 425.19 mi (684.27 km) |
| Helmstedt to Crepy-en-Valois | 410.73 mi (661.01 km) |
| Helmstedt to Crest | 585.82 mi (942.79 km) |
| Helmstedt to Creteil | 443.93 mi (714.44 km) |
