| Birsfelden to Oberkirch | 70.97 mi (114.21 km) |
| Birsfelden to Obernburg am Main | 172.49 mi (277.59 km) |
| Birsfelden to Obernkirchen | 332.34 mi (534.86 km) |
| Birsfelden to Oberschleissheim | 188.87 mi (303.96 km) |
| Birsfelden to Oberstdorf | 124.41 mi (200.22 km) |
| Birsfelden to Obertraubling | 230.62 mi (371.14 km) |
| Birsfelden to Obertshausen | 182.17 mi (293.18 km) |
| Birsfelden to Oberursel | 188.15 mi (302.80 km) |
| Birsfelden to Ochsenfurt | 182.87 mi (294.31 km) |
| Birsfelden to Ochsenhausen | 113.67 mi (182.93 km) |
| Birsfelden to Ochtrup | 322.02 mi (518.24 km) |
| Birsfelden to Odenthal | 241.52 mi (388.70 km) |
| Birsfelden to Oelde | 296.65 mi (477.42 km) |
| Birsfelden to Oelsnitz | 285.53 mi (459.51 km) |
| Birsfelden to Oer-Erkenschwick | 283.01 mi (455.46 km) |
