| Hoeilaart to Obernburg am Main | 215.97 mi (347.56 km) |
| Hoeilaart to Obernkirchen | 225.17 mi (362.38 km) |
| Hoeilaart to Oberschleissheim | 362.69 mi (583.70 km) |
| Hoeilaart to Oberstdorf | 350.49 mi (564.05 km) |
| Hoeilaart to Obertraubling | 364.60 mi (586.77 km) |
| Hoeilaart to Obertshausen | 198.20 mi (318.98 km) |
| Hoeilaart to Oberursel | 184.81 mi (297.43 km) |
| Hoeilaart to Ochsenfurt | 259.30 mi (417.30 km) |
| Hoeilaart to Ochsenhausen | 308.66 mi (496.75 km) |
| Hoeilaart to Ochtrup | 153.66 mi (247.28 km) |
| Hoeilaart to Odenthal | 116.93 mi (188.18 km) |
| Hoeilaart to Oelde | 175.33 mi (282.16 km) |
| Hoeilaart to Oelsnitz | 338.46 mi (544.70 km) |
| Hoeilaart to Oer-Erkenschwick | 134.84 mi (217.00 km) |
| Hoeilaart to Oerlinghausen | 199.21 mi (320.59 km) |
