| Didcot to Heckmondwike | 146.34 mi (235.51 km) |
| Didcot to Hednesford | 82.89 mi (133.40 km) |
| Didcot to Helensburgh | 336.30 mi (541.22 km) |
| Didcot to Hellesdon | 127.90 mi (205.83 km) |
| Didcot to Helston | 204.19 mi (328.62 km) |
| Didcot to Hemel Hempstead | 34.58 mi (55.65 km) |
| Didcot to Hemsworth | 138.54 mi (222.96 km) |
| Didcot to Hendon | 43.63 mi (70.21 km) |
| Didcot to Henley on Thames | 15.31 mi (24.63 km) |
| Didcot to Hereford | 70.24 mi (113.03 km) |
| Didcot to Herne Bay | 103.30 mi (166.24 km) |
| Didcot to Hersham | 39.71 mi (63.91 km) |
| Didcot to Hertford | 51.54 mi (82.94 km) |
| Didcot to Hessle | 150.21 mi (241.73 km) |
| Didcot to Heswall | 142.37 mi (229.12 km) |
