| Hardenberg to Oschatz | 289.90 mi (466.55 km) |
| Hardenberg to Oschersleben | 199.42 mi (320.94 km) |
| Hardenberg to Osnabruck | 63.48 mi (102.17 km) |
| Hardenberg to Ostbevern | 63.45 mi (102.12 km) |
| Hardenberg to Osterburg | 216.22 mi (347.98 km) |
| Hardenberg to Ostercappeln | 69.69 mi (112.15 km) |
| Hardenberg to Osterhofen | 387.09 mi (622.96 km) |
| Hardenberg to Osterholz-Scharmbeck | 101.48 mi (163.32 km) |
| Hardenberg to Osternienburg | 234.76 mi (377.80 km) |
| Hardenberg to Osterode | 164.63 mi (264.95 km) |
| Hardenberg to Osterwieck | 178.23 mi (286.83 km) |
| Hardenberg to Ostfildern | 288.85 mi (464.85 km) |
| Hardenberg to Osthofen | 211.00 mi (339.57 km) |
| Hardenberg to Ostrhauderfehn | 56.44 mi (90.83 km) |
| Hardenberg to Ostringen | 248.60 mi (400.09 km) |
