| Rockville to Cividale del Friuli | 4,376.16 mi (7,042.75 km) |
| Rockville to Civita Castellana | 4,464.78 mi (7,185.37 km) |
| Rockville to Civitanova Marche | 4,486.71 mi (7,220.67 km) |
| Rockville to Civitavecchia | 4,444.84 mi (7,153.28 km) |
| Rockville to Civitella in Val di Chiana | 4,395.34 mi (7,073.61 km) |
| Rockville to Clusone | 4,236.86 mi (6,818.57 km) |
| Rockville to Coccaglio | 4,248.45 mi (6,837.22 km) |
| Rockville to Codigoro | 4,363.97 mi (7,023.14 km) |
| Rockville to Codogno | 4,249.87 mi (6,839.51 km) |
| Rockville to Codroipo | 4,361.92 mi (7,019.83 km) |
| Rockville to Cogoleto | 4,229.06 mi (6,806.02 km) |
| Rockville to Colle di Val d'Elsa | 4,370.51 mi (7,033.65 km) |
| Rockville to Colle Salvetti | 4,335.35 mi (6,977.06 km) |
| Rockville to Collecchio | 4,285.35 mi (6,896.60 km) |
| Rockville to Colleferro | 4,511.52 mi (7,260.59 km) |
