| Barmstedt to Obernburg am Main | 273.76 mi (440.57 km) |
| Barmstedt to Obernkirchen | 108.22 mi (174.16 km) |
| Barmstedt to Oberschleissheim | 390.20 mi (627.97 km) |
| Barmstedt to Oberstdorf | 440.94 mi (709.63 km) |
| Barmstedt to Obertraubling | 348.53 mi (560.91 km) |
| Barmstedt to Obertshausen | 259.85 mi (418.18 km) |
| Barmstedt to Oberursel | 252.47 mi (406.31 km) |
| Barmstedt to Ochsenfurt | 285.87 mi (460.07 km) |
| Barmstedt to Ochsenhausen | 394.68 mi (635.17 km) |
| Barmstedt to Ochtrup | 152.83 mi (245.96 km) |
| Barmstedt to Odenthal | 220.37 mi (354.65 km) |
| Barmstedt to Oelde | 150.70 mi (242.52 km) |
| Barmstedt to Oelsnitz | 253.90 mi (408.61 km) |
| Barmstedt to Oer-Erkenschwick | 181.57 mi (292.20 km) |
| Barmstedt to Oerlinghausen | 133.63 mi (215.06 km) |
