| Aarau to Oberkirch | 78.32 mi (126.04 km) |
| Aarau to Obernburg am Main | 175.80 mi (282.92 km) |
| Aarau to Obernkirchen | 339.58 mi (546.49 km) |
| Aarau to Oberschleissheim | 173.37 mi (279.01 km) |
| Aarau to Oberstdorf | 104.24 mi (167.76 km) |
| Aarau to Obertraubling | 218.30 mi (351.32 km) |
| Aarau to Obertshausen | 187.67 mi (302.03 km) |
| Aarau to Oberursel | 195.17 mi (314.09 km) |
| Aarau to Ochsenfurt | 180.77 mi (290.92 km) |
| Aarau to Ochsenhausen | 99.68 mi (160.42 km) |
| Aarau to Ochtrup | 334.23 mi (537.90 km) |
| Aarau to Odenthal | 254.54 mi (409.64 km) |
| Aarau to Oelde | 306.34 mi (493.01 km) |
| Aarau to Oelsnitz | 279.90 mi (450.46 km) |
| Aarau to Oer-Erkenschwick | 295.29 mi (475.22 km) |
