| Oulu to Oignies | 1,288.16 mi (2,073.09 km) |
| Oulu to Oissel | 1,398.12 mi (2,250.05 km) |
| Oulu to Olivet | 1,469.52 mi (2,364.96 km) |
| Oulu to Ollioules | 1,691.50 mi (2,722.20 km) |
| Oulu to Olonne-sur-Mer | 1,632.12 mi (2,626.64 km) |
| Oulu to Oloron-Sainte-Marie | 1,812.51 mi (2,916.96 km) |
| Oulu to Onet Village | 1,673.16 mi (2,692.69 km) |
| Oulu to Onnaing | 1,279.72 mi (2,059.50 km) |
| Oulu to Orange | 1,645.44 mi (2,648.08 km) |
| Oulu to Orchies | 1,282.28 mi (2,063.63 km) |
| Oulu to Orleans | 1,466.98 mi (2,360.87 km) |
| Oulu to Orly | 1,405.23 mi (2,261.50 km) |
| Oulu to Ormesson-sur-Marne | 1,399.53 mi (2,252.32 km) |
| Oulu to Orsay | 1,412.48 mi (2,273.16 km) |
| Oulu to Orthez | 1,797.60 mi (2,892.96 km) |
