| Oregon City to Octeville | 4,979.96 mi (8,014.46 km) |
| Oregon City to Oignies | 5,060.72 mi (8,144.44 km) |
| Oregon City to Oissel | 5,071.72 mi (8,162.14 km) |
| Oregon City to Olivet | 5,175.39 mi (8,328.98 km) |
| Oregon City to Ollioules | 5,552.06 mi (8,935.18 km) |
| Oregon City to Olonne-sur-Mer | 5,142.03 mi (8,275.30 km) |
| Oregon City to Oloron-Sainte-Marie | 5,358.78 mi (8,624.13 km) |
| Oregon City to Onet Village | 5,389.62 mi (8,673.75 km) |
| Oregon City to Onnaing | 5,081.06 mi (8,177.17 km) |
| Oregon City to Orange | 5,465.82 mi (8,796.39 km) |
| Oregon City to Orchies | 5,066.98 mi (8,154.52 km) |
| Oregon City to Orleans | 5,173.49 mi (8,325.92 km) |
| Oregon City to Orly | 5,140.25 mi (8,272.43 km) |
| Oregon City to Ormesson-sur-Marne | 5,141.88 mi (8,275.06 km) |
| Oregon City to Orsay | 5,137.18 mi (8,267.49 km) |
