| Imperial to Orbetello | 6,239.61 mi (10,041.69 km) |
| Imperial to Oria | 6,556.14 mi (10,551.08 km) |
| Imperial to Oristano | 6,274.00 mi (10,097.03 km) |
| Imperial to Orta Nova | 6,448.69 mi (10,378.17 km) |
| Imperial to Orte | 6,278.49 mi (10,104.26 km) |
| Imperial to Ortona | 6,351.40 mi (10,221.59 km) |
| Imperial to Orvieto | 6,255.85 mi (10,067.81 km) |
| Imperial to Orzinuovi | 6,046.18 mi (9,730.39 km) |
| Imperial to Osimo | 6,261.71 mi (10,077.25 km) |
| Imperial to Ospitaletto | 6,042.99 mi (9,725.26 km) |
| Imperial to Ostuni | 6,541.81 mi (10,528.03 km) |
| Imperial to Ottaviano | 6,433.25 mi (10,353.32 km) |
| Imperial to Ovada | 6,040.85 mi (9,721.81 km) |
| Imperial to Ozieri | 6,255.26 mi (10,066.86 km) |
| Imperial to Paceco | 6,515.93 mi (10,486.37 km) |
