| Orsta to Orbetello | 1,381.09 mi (2,222.65 km) |
| Orsta to Oria | 1,573.83 mi (2,532.83 km) |
| Orsta to Oristano | 1,543.84 mi (2,484.56 km) |
| Orsta to Orta Nova | 1,495.27 mi (2,406.40 km) |
| Orsta to Orte | 1,387.70 mi (2,233.29 km) |
| Orsta to Ortona | 1,412.69 mi (2,273.51 km) |
| Orsta to Orvieto | 1,368.02 mi (2,201.62 km) |
| Orsta to Orzinuovi | 1,170.61 mi (1,883.92 km) |
| Orsta to Osimo | 1,327.10 mi (2,135.77 km) |
| Orsta to Ospitaletto | 1,160.68 mi (1,867.94 km) |
| Orsta to Ostuni | 1,557.55 mi (2,506.64 km) |
| Orsta to Ottaviano | 1,515.26 mi (2,438.58 km) |
| Orsta to Ovada | 1,217.54 mi (1,959.44 km) |
| Orsta to Ozieri | 1,498.25 mi (2,411.20 km) |
| Orsta to Paceco | 1,695.33 mi (2,728.37 km) |
