| Didcot to Cocentaina | 889.45 mi (1,431.43 km) |
| Didcot to Coin | 1,046.45 mi (1,684.10 km) |
| Didcot to Colindres | 576.42 mi (927.65 km) |
| Didcot to Collado-Villalba | 769.49 mi (1,238.37 km) |
| Didcot to Colmenar Viejo | 765.85 mi (1,232.51 km) |
| Didcot to Colmenarejo | 774.51 mi (1,246.45 km) |
| Didcot to Conil de la Frontera | 1,086.27 mi (1,748.18 km) |
| Didcot to Consuegra | 846.73 mi (1,362.68 km) |
| Didcot to Corbera de Llobregat | 719.80 mi (1,158.40 km) |
| Didcot to Cordoba | 963.54 mi (1,550.66 km) |
| Didcot to Coria del Rio | 1,017.07 mi (1,636.81 km) |
| Didcot to Crevillente | 923.14 mi (1,485.66 km) |
| Didcot to Cuarte de Huerva | 692.67 mi (1,114.75 km) |
| Didcot to Cubellas | 731.43 mi (1,177.13 km) |
| Didcot to Cuellar | 719.91 mi (1,158.59 km) |
