| Halluin to Oignies | 22.48 mi (36.18 km) |
| Halluin to Oissel | 134.39 mi (216.28 km) |
| Halluin to Olivet | 209.13 mi (336.56 km) |
| Halluin to Ollioules | 543.43 mi (874.56 km) |
| Halluin to Olonne-sur-Mer | 368.75 mi (593.44 km) |
| Halluin to Oloron-Sainte-Marie | 552.91 mi (889.82 km) |
| Halluin to Onet Village | 444.13 mi (714.76 km) |
| Halluin to Onnaing | 34.31 mi (55.22 km) |
| Halluin to Orange | 465.80 mi (749.64 km) |
| Halluin to Orchies | 21.97 mi (35.35 km) |
| Halluin to Orleans | 206.45 mi (332.25 km) |
| Halluin to Orly | 144.67 mi (232.83 km) |
| Halluin to Ormesson-sur-Marne | 140.50 mi (226.11 km) |
| Halluin to Orsay | 150.06 mi (241.49 km) |
| Halluin to Orthez | 536.11 mi (862.79 km) |
