| Reguengos de Monsaraz to Octeville | 827.34 mi (1,331.47 km) |
| Reguengos de Monsaraz to Oignies | 979.22 mi (1,575.90 km) |
| Reguengos de Monsaraz to Oissel | 867.19 mi (1,395.61 km) |
| Reguengos de Monsaraz to Olivet | 806.34 mi (1,297.67 km) |
| Reguengos de Monsaraz to Ollioules | 771.17 mi (1,241.09 km) |
| Reguengos de Monsaraz to Olonne-sur-Mer | 632.73 mi (1,018.29 km) |
| Reguengos de Monsaraz to Oloron-Sainte-Marie | 489.77 mi (788.21 km) |
| Reguengos de Monsaraz to Onet Village | 665.85 mi (1,071.58 km) |
| Reguengos de Monsaraz to Onnaing | 990.62 mi (1,594.25 km) |
| Reguengos de Monsaraz to Orange | 751.82 mi (1,209.93 km) |
| Reguengos de Monsaraz to Orchies | 986.03 mi (1,586.85 km) |
| Reguengos de Monsaraz to Orleans | 808.64 mi (1,301.39 km) |
| Reguengos de Monsaraz to Orly | 867.86 mi (1,396.69 km) |
| Reguengos de Monsaraz to Ormesson-sur-Marne | 874.26 mi (1,406.98 km) |
| Reguengos de Monsaraz to Orsay | 859.60 mi (1,383.38 km) |
