| Romsey to Oberkirch | 459.58 mi (739.63 km) |
| Romsey to Obernburg am Main | 474.62 mi (763.82 km) |
| Romsey to Obernkirchen | 463.29 mi (745.60 km) |
| Romsey to Oberschleissheim | 613.64 mi (987.56 km) |
| Romsey to Oberstdorf | 585.47 mi (942.23 km) |
| Romsey to Obertraubling | 622.01 mi (1,001.03 km) |
| Romsey to Obertshausen | 457.78 mi (736.73 km) |
| Romsey to Oberursel | 444.78 mi (715.81 km) |
| Romsey to Ochsenfurt | 517.89 mi (833.46 km) |
| Romsey to Ochsenhausen | 550.66 mi (886.20 km) |
| Romsey to Ochtrup | 381.94 mi (614.68 km) |
| Romsey to Odenthal | 374.23 mi (602.27 km) |
| Romsey to Oelde | 419.48 mi (675.09 km) |
| Romsey to Oelsnitz | 598.35 mi (962.95 km) |
| Romsey to Oer-Erkenschwick | 380.21 mi (611.89 km) |
