| Os to Chitila | 1,376.39 mi (2,215.09 km) |
| Os to Cisnadie | 1,259.29 mi (2,026.63 km) |
| Os to Cluj-Napoca | 1,182.93 mi (1,903.73 km) |
| Os to Codlea | 1,292.59 mi (2,080.22 km) |
| Os to Comanesti | 1,276.42 mi (2,054.19 km) |
| Os to Comarnic | 1,323.67 mi (2,130.25 km) |
| Os to Constanta | 1,465.35 mi (2,358.25 km) |
| Os to Corabia | 1,384.56 mi (2,228.23 km) |
| Os to Costesti | 1,339.44 mi (2,155.62 km) |
| Os to Covasna | 1,302.86 mi (2,096.75 km) |
| Os to Craiova | 1,334.36 mi (2,147.45 km) |
| Os to Cristuru Secuiesc | 1,247.36 mi (2,007.43 km) |
| Os to Cugir | 1,232.39 mi (1,983.34 km) |
| Os to Cumpana | 1,466.41 mi (2,359.96 km) |
| Os to Curtea de Arges | 1,306.44 mi (2,102.51 km) |
