| Gladstone to Octeville | 4,343.45 mi (6,990.10 km) |
| Gladstone to Oignies | 4,490.30 mi (7,226.44 km) |
| Gladstone to Oissel | 4,459.21 mi (7,176.41 km) |
| Gladstone to Olivet | 4,544.55 mi (7,313.74 km) |
| Gladstone to Ollioules | 4,886.33 mi (7,863.79 km) |
| Gladstone to Olonne-sur-Mer | 4,445.80 mi (7,154.82 km) |
| Gladstone to Oloron-Sainte-Marie | 4,616.06 mi (7,428.83 km) |
| Gladstone to Onet Village | 4,704.80 mi (7,571.64 km) |
| Gladstone to Onnaing | 4,515.80 mi (7,267.48 km) |
| Gladstone to Orange | 4,803.92 mi (7,731.17 km) |
| Gladstone to Orchies | 4,499.43 mi (7,241.14 km) |
| Gladstone to Orleans | 4,543.44 mi (7,311.97 km) |
| Gladstone to Orly | 4,531.08 mi (7,292.07 km) |
| Gladstone to Ormesson-sur-Marne | 4,535.12 mi (7,298.58 km) |
| Gladstone to Orsay | 4,524.86 mi (7,282.06 km) |
