| Platteville to Orbetello | 4,810.82 mi (7,742.26 km) |
| Platteville to Oria | 5,147.97 mi (8,284.86 km) |
| Platteville to Oristano | 4,817.40 mi (7,752.85 km) |
| Platteville to Orta Nova | 5,035.44 mi (8,103.75 km) |
| Platteville to Orte | 4,855.60 mi (7,814.34 km) |
| Platteville to Ortona | 4,938.16 mi (7,947.20 km) |
| Platteville to Orvieto | 4,833.37 mi (7,778.56 km) |
| Platteville to Orzinuovi | 4,632.39 mi (7,455.11 km) |
| Platteville to Osimo | 4,851.71 mi (7,808.08 km) |
| Platteville to Ospitaletto | 4,631.06 mi (7,452.97 km) |
| Platteville to Ostuni | 5,134.97 mi (8,263.93 km) |
| Platteville to Ottaviano | 5,010.11 mi (8,063.00 km) |
| Platteville to Ovada | 4,615.37 mi (7,427.72 km) |
| Platteville to Ozieri | 4,804.44 mi (7,732.00 km) |
| Platteville to Paceco | 5,065.37 mi (8,151.93 km) |
