| Calne to Oberkirch | 490.52 mi (789.42 km) |
| Calne to Obernburg am Main | 500.22 mi (805.02 km) |
| Calne to Obernkirchen | 477.66 mi (768.72 km) |
| Calne to Oberschleissheim | 642.41 mi (1,033.86 km) |
| Calne to Oberstdorf | 617.21 mi (993.30 km) |
| Calne to Obertraubling | 648.46 mi (1,043.59 km) |
| Calne to Obertshausen | 482.68 mi (776.81 km) |
| Calne to Oberursel | 469.27 mi (755.22 km) |
| Calne to Ochsenfurt | 543.56 mi (874.78 km) |
| Calne to Ochsenhausen | 581.16 mi (935.28 km) |
| Calne to Ochtrup | 396.00 mi (637.29 km) |
| Calne to Odenthal | 395.34 mi (636.24 km) |
| Calne to Oelde | 435.98 mi (701.65 km) |
| Calne to Oelsnitz | 620.21 mi (998.13 km) |
| Calne to Oer-Erkenschwick | 397.74 mi (640.10 km) |
