| Aerzen to Obernburg am Main | 152.76 mi (245.85 km) |
| Aerzen to Obernkirchen | 16.21 mi (26.08 km) |
| Aerzen to Oberschleissheim | 281.59 mi (453.18 km) |
| Aerzen to Oberstdorf | 323.77 mi (521.06 km) |
| Aerzen to Obertraubling | 248.29 mi (399.59 km) |
| Aerzen to Obertshausen | 138.27 mi (222.53 km) |
| Aerzen to Oberursel | 131.00 mi (210.82 km) |
| Aerzen to Ochsenfurt | 169.45 mi (272.71 km) |
| Aerzen to Ochsenhausen | 276.48 mi (444.95 km) |
| Aerzen to Ochtrup | 88.61 mi (142.60 km) |
| Aerzen to Odenthal | 115.94 mi (186.59 km) |
| Aerzen to Oelde | 49.74 mi (80.05 km) |
| Aerzen to Oelsnitz | 168.80 mi (271.66 km) |
| Aerzen to Oer-Erkenschwick | 90.41 mi (145.51 km) |
| Aerzen to Oerlinghausen | 26.03 mi (41.90 km) |
