| Ottaviano to Octeville | 987.91 mi (1,589.89 km) |
| Ottaviano to Oignies | 863.56 mi (1,389.77 km) |
| Ottaviano to Oissel | 875.45 mi (1,408.91 km) |
| Ottaviano to Olivet | 786.30 mi (1,265.42 km) |
| Ottaviano to Ollioules | 470.30 mi (756.87 km) |
| Ottaviano to Olonne-sur-Mer | 899.60 mi (1,447.77 km) |
| Ottaviano to Oloron-Sainte-Marie | 789.84 mi (1,271.13 km) |
| Ottaviano to Onet Village | 650.55 mi (1,046.96 km) |
| Ottaviano to Onnaing | 841.21 mi (1,353.79 km) |
| Ottaviano to Orange | 541.95 mi (872.19 km) |
| Ottaviano to Orchies | 856.22 mi (1,377.95 km) |
| Ottaviano to Orleans | 787.44 mi (1,267.27 km) |
| Ottaviano to Orly | 803.55 mi (1,293.19 km) |
| Ottaviano to Ormesson-sur-Marne | 800.17 mi (1,287.74 km) |
| Ottaviano to Orsay | 809.00 mi (1,301.95 km) |
