| Didcot to Cadiz | 1,070.47 mi (1,722.76 km) |
| Didcot to Calafell | 731.17 mi (1,176.71 km) |
| Didcot to Calahorra | 643.88 mi (1,036.23 km) |
| Didcot to Calasparra | 924.42 mi (1,487.71 km) |
| Didcot to Calatayud | 708.86 mi (1,140.81 km) |
| Didcot to Caldas de Montbuy | 707.61 mi (1,138.78 km) |
| Didcot to Caldas de Reyes | 711.89 mi (1,145.67 km) |
| Didcot to Calella | 714.36 mi (1,149.66 km) |
| Didcot to Callosa de Segura | 931.78 mi (1,499.56 km) |
| Didcot to Calpe | 897.67 mi (1,444.66 km) |
| Didcot to Calvia | 851.11 mi (1,369.73 km) |
| Didcot to Camas | 1,008.85 mi (1,623.59 km) |
| Didcot to Cambados | 721.93 mi (1,161.83 km) |
| Didcot to Cambre | 663.00 mi (1,066.99 km) |
| Didcot to Cambrils | 736.28 mi (1,184.92 km) |
