| Oud-Heverlee to Obernburg am Main | 208.89 mi (336.18 km) |
| Oud-Heverlee to Obernkirchen | 215.30 mi (346.49 km) |
| Oud-Heverlee to Oberschleissheim | 356.95 mi (574.45 km) |
| Oud-Heverlee to Oberstdorf | 346.75 mi (558.05 km) |
| Oud-Heverlee to Obertraubling | 357.67 mi (575.61 km) |
| Oud-Heverlee to Obertshausen | 190.78 mi (307.03 km) |
| Oud-Heverlee to Oberursel | 177.19 mi (285.16 km) |
| Oud-Heverlee to Ochsenfurt | 252.17 mi (405.82 km) |
| Oud-Heverlee to Ochsenhausen | 304.28 mi (489.70 km) |
| Oud-Heverlee to Ochtrup | 144.07 mi (231.87 km) |
| Oud-Heverlee to Odenthal | 107.57 mi (173.12 km) |
| Oud-Heverlee to Oelde | 165.46 mi (266.28 km) |
| Oud-Heverlee to Oelsnitz | 329.86 mi (530.85 km) |
| Oud-Heverlee to Oer-Erkenschwick | 124.97 mi (201.12 km) |
| Oud-Heverlee to Oerlinghausen | 189.34 mi (304.71 km) |
