| Royston to Cernavoda | 1,386.64 mi (2,231.58 km) |
| Royston to Chitila | 1,295.12 mi (2,084.30 km) |
| Royston to Cisnadie | 1,175.39 mi (1,891.61 km) |
| Royston to Cluj-Napoca | 1,116.20 mi (1,796.36 km) |
| Royston to Codlea | 1,229.79 mi (1,979.16 km) |
| Royston to Comanesti | 1,247.48 mi (2,007.63 km) |
| Royston to Comarnic | 1,253.48 mi (2,017.28 km) |
| Royston to Constanta | 1,418.02 mi (2,282.08 km) |
| Royston to Corabia | 1,263.07 mi (2,032.71 km) |
| Royston to Costesti | 1,243.58 mi (2,001.35 km) |
| Royston to Covasna | 1,255.58 mi (2,020.65 km) |
| Royston to Craiova | 1,212.95 mi (1,952.06 km) |
| Royston to Cristuru Secuiesc | 1,192.54 mi (1,919.21 km) |
| Royston to Cugir | 1,138.14 mi (1,831.66 km) |
| Royston to Cumpana | 1,416.81 mi (2,280.13 km) |
