| Grobbendonk to Obernburg am Main | 215.85 mi (347.38 km) |
| Grobbendonk to Obernkirchen | 202.19 mi (325.39 km) |
| Grobbendonk to Oberschleissheim | 367.40 mi (591.28 km) |
| Grobbendonk to Oberstdorf | 362.27 mi (583.01 km) |
| Grobbendonk to Obertraubling | 364.38 mi (586.41 km) |
| Grobbendonk to Obertshausen | 196.63 mi (316.45 km) |
| Grobbendonk to Oberursel | 182.39 mi (293.54 km) |
| Grobbendonk to Ochsenfurt | 258.62 mi (416.22 km) |
| Grobbendonk to Ochsenhausen | 318.45 mi (512.50 km) |
| Grobbendonk to Ochtrup | 126.66 mi (203.85 km) |
| Grobbendonk to Odenthal | 104.72 mi (168.54 km) |
| Grobbendonk to Oelde | 153.95 mi (247.76 km) |
| Grobbendonk to Oelsnitz | 329.60 mi (530.44 km) |
| Grobbendonk to Oer-Erkenschwick | 113.37 mi (182.45 km) |
| Grobbendonk to Oerlinghausen | 177.64 mi (285.88 km) |
