| Hannover to Oestrich-Winkel | 179.62 mi (289.07 km) |
| Hannover to Offenburg | 280.65 mi (451.66 km) |
| Hannover to Oftersheim | 212.81 mi (342.48 km) |
| Hannover to Ohrdruf | 114.90 mi (184.92 km) |
| Hannover to Ohringen | 219.00 mi (352.45 km) |
| Hannover to Olbernhau | 194.84 mi (313.56 km) |
| Hannover to Olching | 296.41 mi (477.03 km) |
| Hannover to Oldenburg | 82.66 mi (133.02 km) |
| Hannover to Oldenburg in Holstein | 141.98 mi (228.50 km) |
| Hannover to Olfen | 108.85 mi (175.18 km) |
| Hannover to Olpe | 123.31 mi (198.45 km) |
| Hannover to Olsberg | 87.77 mi (141.26 km) |
| Hannover to Oranienburg | 150.25 mi (241.81 km) |
| Hannover to Ortenberg | 141.84 mi (228.27 km) |
| Hannover to Oschatz | 162.41 mi (261.38 km) |
