| Rietberg to Oberkirch | 226.24 mi (364.09 km) |
| Rietberg to Obernburg am Main | 138.90 mi (223.54 km) |
| Rietberg to Obernkirchen | 43.42 mi (69.87 km) |
| Rietberg to Oberschleissheim | 281.91 mi (453.69 km) |
| Rietberg to Oberstdorf | 314.37 mi (505.93 km) |
| Rietberg to Obertraubling | 255.68 mi (411.47 km) |
| Rietberg to Obertshausen | 121.02 mi (194.76 km) |
| Rietberg to Oberursel | 110.50 mi (177.83 km) |
| Rietberg to Ochsenfurt | 164.83 mi (265.26 km) |
| Rietberg to Ochsenhausen | 266.21 mi (428.43 km) |
| Rietberg to Ochtrup | 59.84 mi (96.30 km) |
| Rietberg to Odenthal | 77.62 mi (124.91 km) |
| Rietberg to Oelde | 12.32 mi (19.82 km) |
| Rietberg to Oelsnitz | 188.02 mi (302.59 km) |
| Rietberg to Oer-Erkenschwick | 51.77 mi (83.32 km) |
