| Priolo Gargallo to Octeville | 1,200.82 mi (1,932.54 km) |
| Priolo Gargallo to Oignies | 1,098.70 mi (1,768.19 km) |
| Priolo Gargallo to Oissel | 1,096.54 mi (1,764.71 km) |
| Priolo Gargallo to Olivet | 999.13 mi (1,607.94 km) |
| Priolo Gargallo to Ollioules | 642.25 mi (1,033.60 km) |
| Priolo Gargallo to Olonne-sur-Mer | 1,082.75 mi (1,742.52 km) |
| Priolo Gargallo to Oloron-Sainte-Marie | 929.71 mi (1,496.22 km) |
| Priolo Gargallo to Onet Village | 823.92 mi (1,325.98 km) |
| Priolo Gargallo to Onnaing | 1,078.13 mi (1,735.09 km) |
| Priolo Gargallo to Orange | 725.40 mi (1,167.42 km) |
| Priolo Gargallo to Orchies | 1,092.28 mi (1,757.86 km) |
| Priolo Gargallo to Orleans | 1,000.66 mi (1,610.40 km) |
| Priolo Gargallo to Orly | 1,025.79 mi (1,650.85 km) |
| Priolo Gargallo to Ormesson-sur-Marne | 1,023.36 mi (1,646.94 km) |
| Priolo Gargallo to Orsay | 1,029.99 mi (1,657.61 km) |
