| Guadarrama to Cernavoda | 1,644.90 mi (2,647.21 km) |
| Guadarrama to Chitila | 1,543.37 mi (2,483.82 km) |
| Guadarrama to Cisnadie | 1,456.26 mi (2,343.62 km) |
| Guadarrama to Cluj-Napoca | 1,436.01 mi (2,311.04 km) |
| Guadarrama to Codlea | 1,518.50 mi (2,443.78 km) |
| Guadarrama to Comanesti | 1,569.40 mi (2,525.70 km) |
| Guadarrama to Comarnic | 1,526.70 mi (2,456.98 km) |
| Guadarrama to Constanta | 1,675.12 mi (2,695.85 km) |
| Guadarrama to Corabia | 1,471.07 mi (2,367.45 km) |
| Guadarrama to Costesti | 1,489.13 mi (2,396.52 km) |
| Guadarrama to Covasna | 1,554.65 mi (2,501.97 km) |
| Guadarrama to Craiova | 1,436.56 mi (2,311.93 km) |
| Guadarrama to Cristuru Secuiesc | 1,501.44 mi (2,416.34 km) |
| Guadarrama to Cugir | 1,419.09 mi (2,283.81 km) |
| Guadarrama to Cumpana | 1,671.50 mi (2,690.02 km) |
