| Birstall to Oberkirch | 553.65 mi (891.02 km) |
| Birstall to Obernburg am Main | 533.46 mi (858.52 km) |
| Birstall to Obernkirchen | 458.98 mi (738.65 km) |
| Birstall to Oberschleissheim | 687.07 mi (1,105.73 km) |
| Birstall to Oberstdorf | 680.60 mi (1,095.31 km) |
| Birstall to Obertraubling | 679.90 mi (1,094.19 km) |
| Birstall to Obertshausen | 513.35 mi (826.15 km) |
| Birstall to Oberursel | 498.67 mi (802.53 km) |
| Birstall to Ochsenfurt | 575.03 mi (925.42 km) |
| Birstall to Ochsenhausen | 638.03 mi (1,026.81 km) |
| Birstall to Ochtrup | 382.79 mi (616.04 km) |
| Birstall to Odenthal | 414.07 mi (666.38 km) |
| Birstall to Oelde | 430.03 mi (692.06 km) |
| Birstall to Oelsnitz | 629.00 mi (1,012.28 km) |
| Birstall to Oer-Erkenschwick | 399.82 mi (643.45 km) |
