| Hannover to Obernburg am Main | 176.35 mi (283.81 km) |
| Hannover to Obernkirchen | 26.23 mi (42.21 km) |
| Hannover to Oberschleissheim | 295.89 mi (476.19 km) |
| Hannover to Oberstdorf | 343.41 mi (552.66 km) |
| Hannover to Obertraubling | 258.28 mi (415.67 km) |
| Hannover to Obertshausen | 163.45 mi (263.04 km) |
| Hannover to Oberursel | 157.38 mi (253.27 km) |
| Hannover to Ochsenfurt | 188.32 mi (303.07 km) |
| Hannover to Ochsenhausen | 296.90 mi (477.81 km) |
| Hannover to Ochtrup | 107.35 mi (172.77 km) |
| Hannover to Odenthal | 144.50 mi (232.55 km) |
| Hannover to Oelde | 76.02 mi (122.35 km) |
| Hannover to Oelsnitz | 171.18 mi (275.49 km) |
| Hannover to Oer-Erkenschwick | 116.21 mi (187.02 km) |
| Hannover to Oerlinghausen | 52.38 mi (84.30 km) |
