| Gliwice to Oberkirch | 490.45 mi (789.30 km) |
| Gliwice to Obernburg am Main | 423.32 mi (681.26 km) |
| Gliwice to Obernkirchen | 434.50 mi (699.26 km) |
| Gliwice to Oberschleissheim | 349.40 mi (562.30 km) |
| Gliwice to Oberstdorf | 429.61 mi (691.39 km) |
| Gliwice to Obertraubling | 304.71 mi (490.38 km) |
| Gliwice to Obertshausen | 435.07 mi (700.18 km) |
| Gliwice to Oberursel | 445.53 mi (717.02 km) |
| Gliwice to Ochsenfurt | 384.49 mi (618.77 km) |
| Gliwice to Ochsenhausen | 422.07 mi (679.26 km) |
| Gliwice to Ochtrup | 513.23 mi (825.96 km) |
| Gliwice to Odenthal | 508.02 mi (817.58 km) |
| Gliwice to Oelde | 468.64 mi (754.21 km) |
| Gliwice to Oelsnitz | 286.63 mi (461.29 km) |
| Gliwice to Oer-Erkenschwick | 505.03 mi (812.76 km) |
