| Oldenburg in Holstein to Oberkirch | 416.22 mi (669.84 km) |
| Oldenburg in Holstein to Obernburg am Main | 316.89 mi (509.98 km) |
| Oldenburg in Holstein to Obernkirchen | 158.30 mi (254.75 km) |
| Oldenburg in Holstein to Oberschleissheim | 419.05 mi (674.40 km) |
| Oldenburg in Holstein to Oberstdorf | 476.80 mi (767.33 km) |
| Oldenburg in Holstein to Obertraubling | 372.63 mi (599.69 km) |
| Oldenburg in Holstein to Obertshausen | 305.08 mi (490.98 km) |
| Oldenburg in Holstein to Oberursel | 299.35 mi (481.76 km) |
| Oldenburg in Holstein to Ochsenfurt | 323.15 mi (520.06 km) |
| Oldenburg in Holstein to Ochsenhausen | 432.19 mi (695.54 km) |
| Oldenburg in Holstein to Ochtrup | 210.29 mi (338.44 km) |
| Oldenburg in Holstein to Odenthal | 275.33 mi (443.10 km) |
| Oldenburg in Holstein to Oelde | 204.72 mi (329.47 km) |
| Oldenburg in Holstein to Oelsnitz | 273.71 mi (440.49 km) |
| Oldenburg in Holstein to Oer-Erkenschwick | 237.77 mi (382.66 km) |
