| Oeiras to Octeville | 845.36 mi (1,360.48 km) |
| Oeiras to Oignies | 1,012.14 mi (1,628.88 km) |
| Oeiras to Oissel | 898.07 mi (1,445.31 km) |
| Oeiras to Olivet | 847.24 mi (1,363.50 km) |
| Oeiras to Ollioules | 848.00 mi (1,364.72 km) |
| Oeiras to Olonne-sur-Mer | 663.81 mi (1,068.29 km) |
| Oeiras to Oloron-Sainte-Marie | 550.72 mi (886.29 km) |
| Oeiras to Onet Village | 729.43 mi (1,173.91 km) |
| Oeiras to Onnaing | 1,025.78 mi (1,650.84 km) |
| Oeiras to Orange | 821.81 mi (1,322.57 km) |
| Oeiras to Orchies | 1,019.72 mi (1,641.09 km) |
| Oeiras to Orleans | 849.38 mi (1,366.95 km) |
| Oeiras to Orly | 906.26 mi (1,458.48 km) |
| Oeiras to Ormesson-sur-Marne | 912.96 mi (1,469.27 km) |
| Oeiras to Orsay | 897.47 mi (1,444.34 km) |
