| Lockport to Octeville | 3,977.79 mi (6,401.63 km) |
| Lockport to Oignies | 4,129.66 mi (6,646.05 km) |
| Lockport to Oissel | 4,094.91 mi (6,590.13 km) |
| Lockport to Olivet | 4,178.16 mi (6,724.10 km) |
| Lockport to Ollioules | 4,515.57 mi (7,267.11 km) |
| Lockport to Olonne-sur-Mer | 4,074.91 mi (6,557.93 km) |
| Lockport to Oloron-Sainte-Marie | 4,241.50 mi (6,826.04 km) |
| Lockport to Onet Village | 4,333.52 mi (6,974.13 km) |
| Lockport to Onnaing | 4,155.48 mi (6,687.60 km) |
| Lockport to Orange | 4,433.80 mi (7,135.51 km) |
| Lockport to Orchies | 4,139.00 mi (6,661.08 km) |
| Lockport to Orleans | 4,177.13 mi (6,722.45 km) |
| Lockport to Orly | 4,166.62 mi (6,705.53 km) |
| Lockport to Ormesson-sur-Marne | 4,170.85 mi (6,712.33 km) |
| Lockport to Orsay | 4,160.17 mi (6,695.14 km) |
