| Halen to Obernburg am Main | 193.16 mi (310.87 km) |
| Halen to Obernkirchen | 194.40 mi (312.86 km) |
| Halen to Oberschleissheim | 343.67 mi (553.09 km) |
| Halen to Oberstdorf | 337.76 mi (543.57 km) |
| Halen to Obertraubling | 341.93 mi (550.28 km) |
| Halen to Obertshausen | 174.37 mi (280.62 km) |
| Halen to Oberursel | 160.39 mi (258.12 km) |
| Halen to Ochsenfurt | 236.20 mi (380.12 km) |
| Halen to Ochsenhausen | 294.01 mi (473.17 km) |
| Halen to Ochtrup | 124.47 mi (200.31 km) |
| Halen to Odenthal | 87.28 mi (140.46 km) |
| Halen to Oelde | 144.45 mi (232.47 km) |
| Halen to Oelsnitz | 310.79 mi (500.18 km) |
| Halen to Oer-Erkenschwick | 104.01 mi (167.39 km) |
| Halen to Oerlinghausen | 168.33 mi (270.89 km) |
