| Darby to Oberkirch | 3,961.42 mi (6,375.29 km) |
| Darby to Obernburg am Main | 3,966.36 mi (6,383.23 km) |
| Darby to Obernkirchen | 3,896.37 mi (6,270.59 km) |
| Darby to Oberschleissheim | 4,113.39 mi (6,619.87 km) |
| Darby to Oberstdorf | 4,086.79 mi (6,577.06 km) |
| Darby to Obertraubling | 4,115.07 mi (6,622.56 km) |
| Darby to Obertshausen | 3,947.34 mi (6,352.63 km) |
| Darby to Oberursel | 3,933.08 mi (6,329.69 km) |
| Darby to Ochsenfurt | 4,009.31 mi (6,452.36 km) |
| Darby to Ochsenhausen | 4,052.44 mi (6,521.77 km) |
| Darby to Ochtrup | 3,822.94 mi (6,152.42 km) |
| Darby to Odenthal | 3,851.37 mi (6,198.18 km) |
| Darby to Oelde | 3,870.53 mi (6,229.01 km) |
| Darby to Oelsnitz | 4,069.69 mi (6,549.53 km) |
| Darby to Oer-Erkenschwick | 3,840.29 mi (6,180.34 km) |
