| Birkenau to Oestrich-Winkel | 43.75 mi (70.40 km) |
| Birkenau to Offenburg | 83.31 mi (134.07 km) |
| Birkenau to Oftersheim | 14.22 mi (22.89 km) |
| Birkenau to Ohrdruf | 125.31 mi (201.67 km) |
| Birkenau to Ohringen | 43.55 mi (70.08 km) |
| Birkenau to Olbernhau | 218.75 mi (352.04 km) |
| Birkenau to Olching | 151.34 mi (243.57 km) |
| Birkenau to Oldenburg | 248.48 mi (399.89 km) |
| Birkenau to Oldenburg in Holstein | 340.29 mi (547.65 km) |
| Birkenau to Olfen | 159.84 mi (257.23 km) |
| Birkenau to Olpe | 107.72 mi (173.36 km) |
| Birkenau to Olsberg | 124.02 mi (199.59 km) |
| Birkenau to Oranienburg | 295.25 mi (475.16 km) |
| Birkenau to Ortenberg | 57.09 mi (91.87 km) |
| Birkenau to Oschatz | 227.91 mi (366.79 km) |
