| Didcot to Carmona | 1,000.12 mi (1,609.54 km) |
| Didcot to Cartagena | 967.80 mi (1,557.53 km) |
| Didcot to Cartama | 1,042.45 mi (1,677.66 km) |
| Didcot to Cartaya | 1,030.78 mi (1,658.88 km) |
| Didcot to Caspe | 718.96 mi (1,157.06 km) |
| Didcot to Cassa de la Selva | 698.76 mi (1,124.55 km) |
| Didcot to Castalla | 899.28 mi (1,447.25 km) |
| Didcot to Castellbisbal | 716.25 mi (1,152.69 km) |
| Didcot to Castelldefels | 729.53 mi (1,174.06 km) |
| Didcot to Castello de Ampurias | 676.90 mi (1,089.36 km) |
| Didcot to Castellon de la Plana | 805.14 mi (1,295.75 km) |
| Didcot to Castilleja de la Cuesta | 1,010.31 mi (1,625.93 km) |
| Didcot to Catarroja | 844.12 mi (1,358.47 km) |
| Didcot to Catral | 929.31 mi (1,495.58 km) |
| Didcot to Caudete | 891.50 mi (1,434.73 km) |
