| Harpenden to Oschatz | 578.45 mi (930.92 km) |
| Harpenden to Oschersleben | 494.12 mi (795.22 km) |
| Harpenden to Osnabruck | 358.26 mi (576.57 km) |
| Harpenden to Ostbevern | 349.44 mi (562.38 km) |
| Harpenden to Osterburg | 515.76 mi (830.03 km) |
| Harpenden to Ostercappeln | 366.17 mi (589.29 km) |
| Harpenden to Osterhofen | 627.58 mi (1,009.99 km) |
| Harpenden to Osterholz-Scharmbeck | 396.46 mi (638.05 km) |
| Harpenden to Osternienburg | 527.77 mi (849.36 km) |
| Harpenden to Osterode | 453.02 mi (729.07 km) |
| Harpenden to Osterwieck | 471.65 mi (759.05 km) |
| Harpenden to Ostfildern | 474.05 mi (762.90 km) |
| Harpenden to Osthofen | 406.13 mi (653.60 km) |
| Harpenden to Ostrhauderfehn | 347.04 mi (558.50 km) |
| Harpenden to Ostringen | 436.36 mi (702.26 km) |
