| Gliwice to Octeville | 901.18 mi (1,450.31 km) |
| Gliwice to Oignies | 689.45 mi (1,109.57 km) |
| Gliwice to Oissel | 784.45 mi (1,262.46 km) |
| Gliwice to Olivet | 775.28 mi (1,247.69 km) |
| Gliwice to Ollioules | 780.76 mi (1,256.52 km) |
| Gliwice to Olonne-sur-Mer | 969.07 mi (1,559.56 km) |
| Gliwice to Oloron-Sainte-Marie | 1,031.48 mi (1,660.01 km) |
| Gliwice to Onet Village | 854.14 mi (1,374.61 km) |
| Gliwice to Onnaing | 663.45 mi (1,067.72 km) |
| Gliwice to Orange | 774.81 mi (1,246.93 km) |
| Gliwice to Orchies | 678.44 mi (1,091.85 km) |
| Gliwice to Orleans | 774.06 mi (1,245.72 km) |
| Gliwice to Orly | 736.24 mi (1,184.86 km) |
| Gliwice to Ormesson-sur-Marne | 729.10 mi (1,173.37 km) |
| Gliwice to Orsay | 746.09 mi (1,200.71 km) |
