| Gaithersburg to Coudekerque-Branche | 3,775.33 mi (6,075.81 km) |
| Gaithersburg to Coueron | 3,694.59 mi (5,945.87 km) |
| Gaithersburg to Coulommiers | 3,860.19 mi (6,212.38 km) |
| Gaithersburg to Courbevoic | 3,823.10 mi (6,152.69 km) |
| Gaithersburg to Courcouronnes | 3,837.67 mi (6,176.14 km) |
| Gaithersburg to Cournon-d'Auvergne | 3,949.77 mi (6,356.54 km) |
| Gaithersburg to Courrieres | 3,812.07 mi (6,134.94 km) |
| Gaithersburg to Coutras | 3,821.67 mi (6,150.38 km) |
| Gaithersburg to Couzeix | 3,859.78 mi (6,211.72 km) |
| Gaithersburg to Cran-Gevrier | 4,071.67 mi (6,552.72 km) |
| Gaithersburg to Craponne | 4,016.44 mi (6,463.84 km) |
| Gaithersburg to Creil | 3,823.46 mi (6,153.26 km) |
| Gaithersburg to Crepy-en-Valois | 3,840.98 mi (6,181.45 km) |
| Gaithersburg to Crest | 4,059.95 mi (6,533.86 km) |
| Gaithersburg to Creteil | 3,834.71 mi (6,171.37 km) |
