| Sierning to Obernburg am Main | 265.26 mi (426.89 km) |
| Sierning to Obernkirchen | 371.17 mi (597.34 km) |
| Sierning to Oberschleissheim | 127.25 mi (204.79 km) |
| Sierning to Oberstdorf | 192.38 mi (309.61 km) |
| Sierning to Obertraubling | 116.93 mi (188.19 km) |
| Sierning to Obertshausen | 284.52 mi (457.89 km) |
| Sierning to Oberursel | 298.95 mi (481.12 km) |
| Sierning to Ochsenfurt | 222.50 mi (358.07 km) |
| Sierning to Ochsenhausen | 201.41 mi (324.15 km) |
| Sierning to Ochtrup | 426.39 mi (686.21 km) |
| Sierning to Odenthal | 382.70 mi (615.90 km) |
| Sierning to Oelde | 378.65 mi (609.37 km) |
| Sierning to Oelsnitz | 190.27 mi (306.22 km) |
| Sierning to Oer-Erkenschwick | 400.59 mi (644.69 km) |
| Sierning to Oerlinghausen | 368.88 mi (593.66 km) |
