| Didcot to Hoyo de Manzanares | 768.49 mi (1,236.77 km) |
| Didcot to Huelva | 1,030.33 mi (1,658.15 km) |
| Didcot to Huercal de Almeria | 1,018.91 mi (1,639.78 km) |
| Didcot to Huercal-Overa | 983.27 mi (1,582.43 km) |
| Didcot to Huesca | 655.65 mi (1,055.16 km) |
| Didcot to Huetor Vega | 1,005.26 mi (1,617.81 km) |
| Didcot to Huetor-Tajar | 1,005.11 mi (1,617.57 km) |
| Didcot to Humanes de Madrid | 794.01 mi (1,277.83 km) |
| Didcot to Ibi | 897.33 mi (1,444.11 km) |
| Didcot to Ibiza | 886.71 mi (1,427.02 km) |
| Didcot to Icod de los Vinos | 1,794.79 mi (2,888.43 km) |
| Didcot to Igualada | 705.69 mi (1,135.69 km) |
| Didcot to Illescas | 803.44 mi (1,293.01 km) |
| Didcot to Inca | 845.29 mi (1,360.36 km) |
| Didcot to Ingenio | 1,794.35 mi (2,887.73 km) |
