| Oostzaan to Oberkirch | 303.91 mi (489.09 km) |
| Oostzaan to Obernburg am Main | 257.18 mi (413.89 km) |
| Oostzaan to Obernkirchen | 179.06 mi (288.17 km) |
| Oostzaan to Oberschleissheim | 412.47 mi (663.81 km) |
| Oostzaan to Oberstdorf | 421.75 mi (678.74 km) |
| Oostzaan to Obertraubling | 398.43 mi (641.22 km) |
| Oostzaan to Obertshausen | 236.41 mi (380.46 km) |
| Oostzaan to Oberursel | 221.71 mi (356.81 km) |
| Oostzaan to Ochsenfurt | 295.99 mi (476.36 km) |
| Oostzaan to Ochsenhausen | 375.12 mi (603.69 km) |
| Oostzaan to Ochtrup | 98.69 mi (158.83 km) |
| Oostzaan to Odenthal | 135.97 mi (218.82 km) |
| Oostzaan to Oelde | 144.60 mi (232.71 km) |
| Oostzaan to Oelsnitz | 343.13 mi (552.21 km) |
| Oostzaan to Oer-Erkenschwick | 114.50 mi (184.28 km) |
