| Grossostheim to Obernburg am Main | 5.90 mi (9.49 km) |
| Grossostheim to Obernkirchen | 162.36 mi (261.29 km) |
| Grossostheim to Oberschleissheim | 160.89 mi (258.93 km) |
| Grossostheim to Oberstdorf | 181.60 mi (292.26 km) |
| Grossostheim to Obertraubling | 153.31 mi (246.73 km) |
| Grossostheim to Obertshausen | 15.19 mi (24.45 km) |
| Grossostheim to Oberursel | 29.94 mi (48.19 km) |
| Grossostheim to Ochsenfurt | 47.58 mi (76.58 km) |
| Grossostheim to Ochsenhausen | 133.33 mi (214.58 km) |
| Grossostheim to Ochtrup | 178.22 mi (286.82 km) |
| Grossostheim to Odenthal | 115.88 mi (186.49 km) |
| Grossostheim to Oelde | 138.53 mi (222.95 km) |
| Grossostheim to Oelsnitz | 140.76 mi (226.53 km) |
| Grossostheim to Oer-Erkenschwick | 143.60 mi (231.10 km) |
| Grossostheim to Oerlinghausen | 142.80 mi (229.81 km) |
