| Potomac to Cernavoda | 5,037.10 mi (8,106.42 km) |
| Potomac to Chitila | 4,949.84 mi (7,965.99 km) |
| Potomac to Cisnadie | 4,828.57 mi (7,770.84 km) |
| Potomac to Cluj-Napoca | 4,764.25 mi (7,667.31 km) |
| Potomac to Codlea | 4,879.61 mi (7,852.97 km) |
| Potomac to Comanesti | 4,888.02 mi (7,866.51 km) |
| Potomac to Comarnic | 4,905.43 mi (7,894.52 km) |
| Potomac to Constanta | 5,067.69 mi (8,155.66 km) |
| Potomac to Corabia | 4,921.59 mi (7,920.53 km) |
| Potomac to Costesti | 4,899.75 mi (7,885.38 km) |
| Potomac to Covasna | 4,901.96 mi (7,888.95 km) |
| Potomac to Craiova | 4,871.23 mi (7,839.48 km) |
| Potomac to Cristuru Secuiesc | 4,839.46 mi (7,788.37 km) |
| Potomac to Cugir | 4,792.45 mi (7,712.71 km) |
| Potomac to Cumpana | 5,067.02 mi (8,154.58 km) |
