| Siegburg to Chitila | 972.38 mi (1,564.89 km) |
| Siegburg to Cisnadie | 852.62 mi (1,372.15 km) |
| Siegburg to Cluj-Napoca | 794.01 mi (1,277.83 km) |
| Siegburg to Codlea | 907.23 mi (1,460.05 km) |
| Siegburg to Comanesti | 926.36 mi (1,490.83 km) |
| Siegburg to Comarnic | 930.74 mi (1,497.88 km) |
| Siegburg to Constanta | 1,095.37 mi (1,762.82 km) |
| Siegburg to Corabia | 941.64 mi (1,515.42 km) |
| Siegburg to Costesti | 920.98 mi (1,482.18 km) |
| Siegburg to Covasna | 933.43 mi (1,502.20 km) |
| Siegburg to Craiova | 891.22 mi (1,434.28 km) |
| Siegburg to Cristuru Secuiesc | 870.40 mi (1,400.78 km) |
| Siegburg to Cugir | 815.36 mi (1,312.19 km) |
| Siegburg to Cumpana | 1,094.12 mi (1,760.81 km) |
| Siegburg to Curtea de Arges | 895.11 mi (1,440.54 km) |
