| Harrow to Heckmondwike | 156.91 mi (252.53 km) |
| Harrow to Hednesford | 104.84 mi (168.72 km) |
| Harrow to Helensburgh | 354.60 mi (570.68 km) |
| Harrow to Hellesdon | 100.03 mi (160.98 km) |
| Harrow to Helston | 237.95 mi (382.95 km) |
| Harrow to Hemel Hempstead | 12.81 mi (20.61 km) |
| Harrow to Hemsworth | 146.20 mi (235.29 km) |
| Harrow to Hendon | 5.20 mi (8.37 km) |
| Harrow to Henley on Thames | 24.14 mi (38.84 km) |
| Harrow to Hereford | 106.33 mi (171.12 km) |
| Harrow to Herne Bay | 65.22 mi (104.97 km) |
| Harrow to Hersham | 15.07 mi (24.26 km) |
| Harrow to Hertford | 18.69 mi (30.08 km) |
| Harrow to Hessle | 147.92 mi (238.06 km) |
| Harrow to Heswall | 167.18 mi (269.06 km) |
