| Cities | Distance |
|---|---|
| Harpenden to Dormagen | 312.46 mi (502.85 km) |
| Harpenden to Dornstadt | 510.54 mi (821.63 km) |
| Harpenden to Dorsten | 313.10 mi (503.89 km) |
| Harpenden to Dortmund | 335.56 mi (540.03 km) |
| Harpenden to Dorverden | 410.63 mi (660.84 km) |
| Harpenden to Dossenheim | 427.65 mi (688.23 km) |
| Harpenden to Dreieich | 413.58 mi (665.59 km) |
| Harpenden to Drensteinfurt | 345.52 mi (556.06 km) |
| Harpenden to Dresden | 608.37 mi (979.08 km) |
| Harpenden to Drochtersen | 426.95 mi (687.11 km) |
| Harpenden to Drolshagen | 353.77 mi (569.33 km) |
| Harpenden to Duderstadt | 454.87 mi (732.05 km) |
| Harpenden to Duisburg | 306.20 mi (492.78 km) |
| Harpenden to Dulmen | 325.72 mi (524.20 km) |
| Harpenden to Duren | 303.38 mi (488.24 km) |