| Aver-o-Mar to Orbetello | 1,027.35 mi (1,653.36 km) |
| Aver-o-Mar to Oria | 1,373.84 mi (2,210.98 km) |
| Aver-o-Mar to Oristano | 914.31 mi (1,471.44 km) |
| Aver-o-Mar to Orta Nova | 1,265.15 mi (2,036.07 km) |
| Aver-o-Mar to Orte | 1,087.02 mi (1,749.39 km) |
| Aver-o-Mar to Ortona | 1,190.04 mi (1,915.19 km) |
| Aver-o-Mar to Orvieto | 1,072.14 mi (1,725.44 km) |
| Aver-o-Mar to Orzinuovi | 976.04 mi (1,570.78 km) |
| Aver-o-Mar to Osimo | 1,140.17 mi (1,834.93 km) |
| Aver-o-Mar to Ospitaletto | 984.58 mi (1,584.53 km) |
| Aver-o-Mar to Ostuni | 1,368.20 mi (2,201.90 km) |
| Aver-o-Mar to Ottaviano | 1,206.83 mi (1,942.21 km) |
| Aver-o-Mar to Ovada | 905.73 mi (1,457.63 km) |
| Aver-o-Mar to Ozieri | 926.92 mi (1,491.73 km) |
| Aver-o-Mar to Paceco | 1,154.67 mi (1,858.26 km) |
