| Cities | Distance |
|---|---|
| Harpenden to Greenford | 19.87 mi (31.98 km) |
| Harpenden to Greenock | 337.22 mi (542.70 km) |
| Harpenden to Greetland | 143.93 mi (231.63 km) |
| Harpenden to Grimsby | 121.45 mi (195.45 km) |
| Harpenden to Guildford | 41.22 mi (66.34 km) |
| Harpenden to Guisborough | 190.01 mi (305.79 km) |
| Harpenden to Guiseley | 152.96 mi (246.17 km) |
| Harpenden to Hackney | 23.64 mi (38.04 km) |
| Harpenden to Haddington | 302.51 mi (486.85 km) |
| Harpenden to Hadleigh | 45.06 mi (72.52 km) |
| Harpenden to Hailsham | 70.90 mi (114.11 km) |
| Harpenden to Halesowen | 84.26 mi (135.60 km) |
| Harpenden to Halewood | 149.18 mi (240.09 km) |
| Harpenden to Halifax | 146.13 mi (235.18 km) |
| Harpenden to Halstead | 43.28 mi (69.65 km) |