| Kasterlee to Obernburg am Main | 208.18 mi (335.04 km) |
| Kasterlee to Obernkirchen | 191.55 mi (308.26 km) |
| Kasterlee to Oberschleissheim | 360.64 mi (580.39 km) |
| Kasterlee to Oberstdorf | 357.57 mi (575.45 km) |
| Kasterlee to Obertraubling | 356.41 mi (573.59 km) |
| Kasterlee to Obertshausen | 188.69 mi (303.67 km) |
| Kasterlee to Oberursel | 174.31 mi (280.53 km) |
| Kasterlee to Ochsenfurt | 250.72 mi (403.49 km) |
| Kasterlee to Ochsenhausen | 313.20 mi (504.04 km) |
| Kasterlee to Ochtrup | 116.40 mi (187.33 km) |
| Kasterlee to Odenthal | 95.11 mi (153.06 km) |
| Kasterlee to Oelde | 143.28 mi (230.59 km) |
| Kasterlee to Oelsnitz | 320.00 mi (514.99 km) |
| Kasterlee to Oer-Erkenschwick | 102.71 mi (165.30 km) |
| Kasterlee to Oerlinghausen | 166.97 mi (268.71 km) |
