| Didcot to Cernavoda | 1,432.58 mi (2,305.51 km) |
| Didcot to Chitila | 1,339.76 mi (2,156.14 km) |
| Didcot to Cisnadie | 1,220.86 mi (1,964.79 km) |
| Didcot to Cluj-Napoca | 1,163.40 mi (1,872.31 km) |
| Didcot to Codlea | 1,276.23 mi (2,053.89 km) |
| Didcot to Comanesti | 1,295.94 mi (2,085.62 km) |
| Didcot to Comarnic | 1,299.22 mi (2,090.89 km) |
| Didcot to Constanta | 1,464.11 mi (2,356.26 km) |
| Didcot to Corabia | 1,304.98 mi (2,100.16 km) |
| Didcot to Costesti | 1,287.59 mi (2,072.18 km) |
| Didcot to Covasna | 1,302.82 mi (2,096.69 km) |
| Didcot to Craiova | 1,255.32 mi (2,020.24 km) |
| Didcot to Cristuru Secuiesc | 1,239.82 mi (1,995.29 km) |
| Didcot to Cugir | 1,183.24 mi (1,904.23 km) |
| Didcot to Cumpana | 1,462.76 mi (2,354.08 km) |
