| Nettuno to Octeville | 890.35 mi (1,432.88 km) |
| Nettuno to Oignies | 774.96 mi (1,247.18 km) |
| Nettuno to Oissel | 780.26 mi (1,255.70 km) |
| Nettuno to Olivet | 688.27 mi (1,107.66 km) |
| Nettuno to Ollioules | 367.03 mi (590.68 km) |
| Nettuno to Olonne-sur-Mer | 796.94 mi (1,282.55 km) |
| Nettuno to Oloron-Sainte-Marie | 687.65 mi (1,106.66 km) |
| Nettuno to Onet Village | 547.18 mi (880.60 km) |
| Nettuno to Onnaing | 753.70 mi (1,212.96 km) |
| Nettuno to Orange | 438.75 mi (706.10 km) |
| Nettuno to Orchies | 768.18 mi (1,236.26 km) |
| Nettuno to Orleans | 689.53 mi (1,109.69 km) |
| Nettuno to Orly | 708.62 mi (1,140.41 km) |
| Nettuno to Ormesson-sur-Marne | 705.59 mi (1,135.54 km) |
| Nettuno to Orsay | 713.61 mi (1,148.45 km) |
