| Birkenau to Obernburg am Main | 27.40 mi (44.10 km) |
| Birkenau to Obernkirchen | 187.80 mi (302.24 km) |
| Birkenau to Oberschleissheim | 158.35 mi (254.83 km) |
| Birkenau to Oberstdorf | 165.15 mi (265.78 km) |
| Birkenau to Obertraubling | 161.35 mi (259.67 km) |
| Birkenau to Obertshausen | 35.42 mi (57.00 km) |
| Birkenau to Oberursel | 44.77 mi (72.05 km) |
| Birkenau to Ochsenfurt | 61.23 mi (98.54 km) |
| Birkenau to Ochsenhausen | 117.34 mi (188.84 km) |
| Birkenau to Ochtrup | 194.31 mi (312.72 km) |
| Birkenau to Odenthal | 123.58 mi (198.88 km) |
| Birkenau to Oelde | 158.90 mi (255.72 km) |
| Birkenau to Oelsnitz | 164.69 mi (265.05 km) |
| Birkenau to Oer-Erkenschwick | 157.33 mi (253.21 km) |
| Birkenau to Oerlinghausen | 166.25 mi (267.55 km) |
