| Grobbendonk to Oignies | 90.57 mi (145.75 km) |
| Grobbendonk to Oissel | 205.17 mi (330.20 km) |
| Grobbendonk to Olivet | 262.78 mi (422.90 km) |
| Grobbendonk to Ollioules | 559.44 mi (900.33 km) |
| Grobbendonk to Olonne-sur-Mer | 436.51 mi (702.50 km) |
| Grobbendonk to Oloron-Sainte-Marie | 606.59 mi (976.21 km) |
| Grobbendonk to Onet Village | 482.33 mi (776.24 km) |
| Grobbendonk to Onnaing | 74.40 mi (119.74 km) |
| Grobbendonk to Orange | 487.94 mi (785.26 km) |
| Grobbendonk to Orchies | 81.48 mi (131.13 km) |
| Grobbendonk to Orleans | 260.24 mi (418.81 km) |
| Grobbendonk to Orly | 198.63 mi (319.66 km) |
| Grobbendonk to Ormesson-sur-Marne | 192.82 mi (310.31 km) |
| Grobbendonk to Orsay | 206.19 mi (331.83 km) |
| Grobbendonk to Orthez | 591.14 mi (951.34 km) |
