| Smorumnedre to Oria | 1,080.09 mi (1,738.24 km) |
| Smorumnedre to Oristano | 1,106.62 mi (1,780.94 km) |
| Smorumnedre to Orta Nova | 1,006.97 mi (1,620.56 km) |
| Smorumnedre to Orte | 917.08 mi (1,475.90 km) |
| Smorumnedre to Ortona | 929.46 mi (1,495.83 km) |
| Smorumnedre to Orvieto | 899.29 mi (1,447.27 km) |
| Smorumnedre to Orzinuovi | 721.37 mi (1,160.93 km) |
| Smorumnedre to Osimo | 848.02 mi (1,364.75 km) |
| Smorumnedre to Ospitaletto | 709.87 mi (1,142.43 km) |
| Smorumnedre to Ostuni | 1,063.77 mi (1,711.97 km) |
| Smorumnedre to Ottaviano | 1,033.07 mi (1,662.56 km) |
| Smorumnedre to Ovada | 783.10 mi (1,260.28 km) |
| Smorumnedre to Ozieri | 1,057.32 mi (1,701.59 km) |
| Smorumnedre to Paceco | 1,226.46 mi (1,973.80 km) |
| Smorumnedre to Pachino | 1,320.45 mi (2,125.06 km) |
