| Harpenden to Dobrova | 777.52 mi (1,251.30 km) |
| Harpenden to Dobrovnik | 831.16 mi (1,337.63 km) |
| Harpenden to Dobrovo | 745.83 mi (1,200.30 km) |
| Harpenden to Dol | 784.95 mi (1,263.26 km) |
| Harpenden to Dolenjske Toplice | 814.69 mi (1,311.12 km) |
| Harpenden to Domzale | 781.05 mi (1,256.98 km) |
| Harpenden to Dornava | 823.26 mi (1,324.91 km) |
| Harpenden to Dragomer | 777.68 mi (1,251.55 km) |
| Harpenden to Dravograd | 780.33 mi (1,255.82 km) |
| Harpenden to Gorenja Vas | 764.92 mi (1,231.03 km) |
| Harpenden to Gorisnica | 826.50 mi (1,330.12 km) |
| Harpenden to Gornja Radgona | 815.96 mi (1,313.17 km) |
| Harpenden to Gornji Grad | 783.04 mi (1,260.19 km) |
| Harpenden to Gornji Petrovci | 820.37 mi (1,320.25 km) |
| Harpenden to Grad | 815.82 mi (1,312.93 km) |
