| Prineville to Orbetello | 5,752.74 mi (9,258.14 km) |
| Prineville to Oria | 6,036.21 mi (9,714.34 km) |
| Prineville to Oristano | 5,825.15 mi (9,374.68 km) |
| Prineville to Orta Nova | 5,937.41 mi (9,555.34 km) |
| Prineville to Orte | 5,783.21 mi (9,307.18 km) |
| Prineville to Ortona | 5,842.69 mi (9,402.89 km) |
| Prineville to Orvieto | 5,760.67 mi (9,270.90 km) |
| Prineville to Orzinuovi | 5,546.35 mi (8,925.99 km) |
| Prineville to Osimo | 5,751.68 mi (9,256.43 km) |
| Prineville to Ospitaletto | 5,541.11 mi (8,917.56 km) |
| Prineville to Ostuni | 6,020.78 mi (9,689.51 km) |
| Prineville to Ottaviano | 5,934.15 mi (9,550.09 km) |
| Prineville to Ovada | 5,555.21 mi (8,940.24 km) |
| Prineville to Ozieri | 5,798.11 mi (9,331.16 km) |
| Prineville to Paceco | 6,051.52 mi (9,738.98 km) |
