| Cities | Distance |
|---|---|
| Harpenden to Dewsbury | 140.08 mi (225.44 km) |
| Harpenden to Deysbrook | 155.29 mi (249.92 km) |
| Harpenden to Didcot | 40.75 mi (65.58 km) |
| Harpenden to Dingle | 153.62 mi (247.22 km) |
| Harpenden to Dinnington | 112.79 mi (181.53 km) |
| Harpenden to Dodworth | 128.80 mi (207.28 km) |
| Harpenden to Dollis Hill | 18.23 mi (29.33 km) |
| Harpenden to Doncaster | 122.31 mi (196.84 km) |
| Harpenden to Dorchester | 117.97 mi (189.85 km) |
| Harpenden to Dorking | 40.43 mi (65.07 km) |
| Harpenden to Dorridge | 70.81 mi (113.96 km) |
| Harpenden to Dover | 85.85 mi (138.17 km) |
| Harpenden to Downham Market | 62.54 mi (100.65 km) |
| Harpenden to Droitwich | 82.58 mi (132.90 km) |
| Harpenden to Dronfield | 112.76 mi (181.47 km) |