| Halifax to Octeville | 283.31 mi (455.94 km) |
| Halifax to Oignies | 304.98 mi (490.82 km) |
| Halifax to Oissel | 328.31 mi (528.37 km) |
| Halifax to Olivet | 436.90 mi (703.11 km) |
| Halifax to Ollioules | 811.20 mi (1,305.50 km) |
| Halifax to Olonne-sur-Mer | 496.72 mi (799.39 km) |
| Halifax to Oloron-Sainte-Marie | 729.85 mi (1,174.58 km) |
| Halifax to Onet Village | 677.09 mi (1,089.68 km) |
| Halifax to Onnaing | 326.93 mi (526.14 km) |
| Halifax to Orange | 727.57 mi (1,170.91 km) |
| Halifax to Orchies | 311.97 mi (502.07 km) |
| Halifax to Orleans | 434.54 mi (699.32 km) |
| Halifax to Orly | 390.15 mi (627.88 km) |
| Halifax to Ormesson-sur-Marne | 390.57 mi (628.57 km) |
| Halifax to Orsay | 388.91 mi (625.89 km) |
