| Upminster to Cernavoda | 1,368.83 mi (2,202.92 km) |
| Upminster to Chitila | 1,276.28 mi (2,053.98 km) |
| Upminster to Cisnadie | 1,157.19 mi (1,862.32 km) |
| Upminster to Cluj-Napoca | 1,099.44 mi (1,769.37 km) |
| Upminster to Codlea | 1,212.38 mi (1,951.14 km) |
| Upminster to Comanesti | 1,231.85 mi (1,982.47 km) |
| Upminster to Comarnic | 1,235.50 mi (1,988.35 km) |
| Upminster to Constanta | 1,400.34 mi (2,253.63 km) |
| Upminster to Corabia | 1,242.24 mi (1,999.20 km) |
| Upminster to Costesti | 1,224.26 mi (1,970.26 km) |
| Upminster to Covasna | 1,238.86 mi (1,993.75 km) |
| Upminster to Craiova | 1,192.44 mi (1,919.04 km) |
| Upminster to Cristuru Secuiesc | 1,175.85 mi (1,892.34 km) |
| Upminster to Cugir | 1,119.64 mi (1,801.89 km) |
| Upminster to Cumpana | 1,399.01 mi (2,251.49 km) |
