| Osterwieck to Oerlinghausen | 87.27 mi (140.44 km) |
| Osterwieck to Oestrich-Winkel | 180.05 mi (289.77 km) |
| Osterwieck to Offenburg | 271.29 mi (436.59 km) |
| Osterwieck to Oftersheim | 202.19 mi (325.40 km) |
| Osterwieck to Ohrdruf | 78.67 mi (126.61 km) |
| Osterwieck to Ohringen | 198.47 mi (319.40 km) |
| Osterwieck to Olbernhau | 144.33 mi (232.28 km) |
| Osterwieck to Olching | 261.61 mi (421.02 km) |
| Osterwieck to Oldenburg | 132.91 mi (213.91 km) |
| Osterwieck to Oldenburg in Holstein | 161.36 mi (259.69 km) |
| Osterwieck to Olfen | 143.33 mi (230.67 km) |
| Osterwieck to Olpe | 140.32 mi (225.83 km) |
| Osterwieck to Olsberg | 104.78 mi (168.62 km) |
| Osterwieck to Oranienburg | 119.45 mi (192.23 km) |
| Osterwieck to Ortenberg | 132.55 mi (213.31 km) |
