| San Giorgio del Sannio to Octeville | 992.04 mi (1,596.54 km) |
| San Giorgio del Sannio to Oignies | 863.10 mi (1,389.02 km) |
| San Giorgio del Sannio to Oissel | 878.23 mi (1,413.38 km) |
| San Giorgio del Sannio to Olivet | 790.93 mi (1,272.89 km) |
| San Giorgio del Sannio to Ollioules | 482.95 mi (777.23 km) |
| San Giorgio del Sannio to Olonne-sur-Mer | 908.66 mi (1,462.35 km) |
| San Giorgio del Sannio to Oloron-Sainte-Marie | 804.32 mi (1,294.43 km) |
| San Giorgio del Sannio to Onet Village | 661.82 mi (1,065.10 km) |
| San Giorgio del Sannio to Onnaing | 840.30 mi (1,352.34 km) |
| San Giorgio del Sannio to Orange | 552.49 mi (889.15 km) |
| San Giorgio del Sannio to Orchies | 855.52 mi (1,376.83 km) |
| San Giorgio del Sannio to Orleans | 792.01 mi (1,274.61 km) |
| San Giorgio del Sannio to Orly | 806.26 mi (1,297.55 km) |
| San Giorgio del Sannio to Ormesson-sur-Marne | 802.69 mi (1,291.80 km) |
| San Giorgio del Sannio to Orsay | 811.96 mi (1,306.72 km) |
