| Halstead to Octeville | 188.69 mi (303.66 km) |
| Halstead to Oignies | 144.10 mi (231.91 km) |
| Halstead to Oissel | 180.94 mi (291.20 km) |
| Halstead to Olivet | 287.49 mi (462.67 km) |
| Halstead to Ollioules | 654.65 mi (1,053.56 km) |
| Halstead to Olonne-sur-Mer | 389.21 mi (626.37 km) |
| Halstead to Oloron-Sainte-Marie | 607.40 mi (977.51 km) |
| Halstead to Onet Village | 531.32 mi (855.07 km) |
| Halstead to Onnaing | 167.28 mi (269.21 km) |
| Halstead to Orange | 572.50 mi (921.34 km) |
| Halstead to Orchies | 151.70 mi (244.13 km) |
| Halstead to Orleans | 284.94 mi (458.57 km) |
| Halstead to Orly | 234.26 mi (377.01 km) |
| Halstead to Ormesson-sur-Marne | 233.73 mi (376.16 km) |
| Halstead to Orsay | 234.47 mi (377.35 km) |
