| Herisau to Oberkirch | 96.49 mi (155.29 km) |
| Herisau to Obernburg am Main | 169.84 mi (273.33 km) |
| Herisau to Obernkirchen | 337.45 mi (543.08 km) |
| Herisau to Oberschleissheim | 122.36 mi (196.92 km) |
| Herisau to Oberstdorf | 47.39 mi (76.27 km) |
| Herisau to Obertraubling | 172.64 mi (277.84 km) |
| Herisau to Obertshausen | 186.45 mi (300.07 km) |
| Herisau to Oberursel | 197.35 mi (317.61 km) |
| Herisau to Ochsenfurt | 160.83 mi (258.84 km) |
| Herisau to Ochsenhausen | 57.17 mi (92.01 km) |
| Herisau to Ochtrup | 345.78 mi (556.48 km) |
| Herisau to Odenthal | 270.19 mi (434.83 km) |
| Herisau to Oelde | 311.49 mi (501.30 km) |
| Herisau to Oelsnitz | 247.50 mi (398.31 km) |
| Herisau to Oer-Erkenschwick | 307.81 mi (495.38 km) |
