| Watford to Horwich | 161.23 mi (259.47 km) |
| Watford to Houghton le Spring | 224.54 mi (361.37 km) |
| Watford to Houghton Regis | 18.06 mi (29.06 km) |
| Watford to Hounslow | 13.03 mi (20.98 km) |
| Watford to Hove | 57.44 mi (92.43 km) |
| Watford to Hoyland Nether | 134.71 mi (216.80 km) |
| Watford to Hucclecote | 77.50 mi (124.72 km) |
| Watford to Huddersfield | 149.23 mi (240.16 km) |
| Watford to Huntingdon | 48.03 mi (77.30 km) |
| Watford to Huntington | 163.76 mi (263.54 km) |
| Watford to Huyton | 158.97 mi (255.84 km) |
| Watford to Hwlffordd | 195.99 mi (315.41 km) |
| Watford to Hyde | 142.67 mi (229.60 km) |
| Watford to Hythe | 69.50 mi (111.86 km) |
| Watford to Hythe | 75.49 mi (121.50 km) |
