| Hallein to Obernburg am Main | 234.02 mi (376.62 km) |
| Hallein to Obernkirchen | 363.27 mi (584.63 km) |
| Hallein to Oberschleissheim | 80.92 mi (130.23 km) |
| Hallein to Oberstdorf | 131.99 mi (212.42 km) |
| Hallein to Obertraubling | 99.14 mi (159.56 km) |
| Hallein to Obertshausen | 254.51 mi (409.59 km) |
| Hallein to Oberursel | 269.27 mi (433.35 km) |
| Hallein to Ochsenfurt | 194.22 mi (312.56 km) |
| Hallein to Ochsenhausen | 147.98 mi (238.15 km) |
| Hallein to Ochtrup | 408.42 mi (657.29 km) |
| Hallein to Odenthal | 355.09 mi (571.46 km) |
| Hallein to Oelde | 362.29 mi (583.05 km) |
| Hallein to Oelsnitz | 194.48 mi (312.99 km) |
| Hallein to Oer-Erkenschwick | 378.60 mi (609.30 km) |
| Hallein to Oerlinghausen | 356.28 mi (573.37 km) |
