| Rockville to Cernavoda | 5,032.27 mi (8,098.66 km) |
| Rockville to Chitila | 4,945.04 mi (7,958.28 km) |
| Rockville to Cisnadie | 4,823.77 mi (7,763.11 km) |
| Rockville to Cluj-Napoca | 4,759.42 mi (7,659.55 km) |
| Rockville to Codlea | 4,874.78 mi (7,845.21 km) |
| Rockville to Comanesti | 4,883.16 mi (7,858.69 km) |
| Rockville to Comarnic | 4,900.62 mi (7,886.78 km) |
| Rockville to Constanta | 5,062.86 mi (8,147.89 km) |
| Rockville to Corabia | 4,916.84 mi (7,912.90 km) |
| Rockville to Costesti | 4,894.97 mi (7,877.69 km) |
| Rockville to Covasna | 4,897.12 mi (7,881.16 km) |
| Rockville to Craiova | 4,866.47 mi (7,831.83 km) |
| Rockville to Cristuru Secuiesc | 4,834.63 mi (7,780.59 km) |
| Rockville to Cugir | 4,787.66 mi (7,704.99 km) |
| Rockville to Cumpana | 5,062.19 mi (8,146.81 km) |
