| Solothurn to Oberkirch | 94.47 mi (152.04 km) |
| Solothurn to Obernburg am Main | 195.61 mi (314.80 km) |
| Solothurn to Obernkirchen | 355.98 mi (572.89 km) |
| Solothurn to Oberschleissheim | 200.54 mi (322.74 km) |
| Solothurn to Oberstdorf | 129.31 mi (208.11 km) |
| Solothurn to Obertraubling | 245.57 mi (395.20 km) |
| Solothurn to Obertshausen | 205.66 mi (330.97 km) |
| Solothurn to Oberursel | 211.76 mi (340.80 km) |
| Solothurn to Ochsenfurt | 204.31 mi (328.81 km) |
| Solothurn to Ochsenhausen | 126.99 mi (204.38 km) |
| Solothurn to Ochtrup | 345.04 mi (555.29 km) |
| Solothurn to Odenthal | 264.37 mi (425.47 km) |
| Solothurn to Oelde | 320.17 mi (515.26 km) |
| Solothurn to Oelsnitz | 305.37 mi (491.45 km) |
| Solothurn to Oer-Erkenschwick | 306.04 mi (492.52 km) |
