| Portimao to Octeville | 928.87 mi (1,494.87 km) |
| Portimao to Oignies | 1,083.09 mi (1,743.06 km) |
| Portimao to Oissel | 970.85 mi (1,562.43 km) |
| Portimao to Olivet | 910.40 mi (1,465.15 km) |
| Portimao to Ollioules | 863.97 mi (1,390.43 km) |
| Portimao to Olonne-sur-Mer | 736.24 mi (1,184.87 km) |
| Portimao to Oloron-Sainte-Marie | 591.53 mi (951.98 km) |
| Portimao to Onet Village | 766.19 mi (1,233.06 km) |
| Portimao to Onnaing | 1,094.61 mi (1,761.61 km) |
| Portimao to Orange | 849.06 mi (1,366.43 km) |
| Portimao to Orchies | 1,089.94 mi (1,754.09 km) |
| Portimao to Orleans | 912.71 mi (1,468.86 km) |
| Portimao to Orly | 971.93 mi (1,564.17 km) |
| Portimao to Ormesson-sur-Marne | 978.33 mi (1,574.47 km) |
| Portimao to Orsay | 963.65 mi (1,550.85 km) |
