| Perris to Orbetello | 6,242.06 mi (10,045.62 km) |
| Perris to Oria | 6,553.53 mi (10,546.89 km) |
| Perris to Oristano | 6,282.83 mi (10,111.24 km) |
| Perris to Orta Nova | 6,447.38 mi (10,376.06 km) |
| Perris to Orte | 6,279.59 mi (10,106.02 km) |
| Perris to Ortona | 6,350.33 mi (10,219.87 km) |
| Perris to Orvieto | 6,256.91 mi (10,069.53 km) |
| Perris to Orzinuovi | 6,046.01 mi (9,730.12 km) |
| Perris to Osimo | 6,260.23 mi (10,074.87 km) |
| Perris to Ospitaletto | 6,042.47 mi (9,724.41 km) |
| Perris to Ostuni | 6,538.98 mi (10,523.47 km) |
| Perris to Ottaviano | 6,434.02 mi (10,354.55 km) |
| Perris to Ovada | 6,043.08 mi (9,725.40 km) |
| Perris to Ozieri | 6,262.69 mi (10,078.82 km) |
| Perris to Paceco | 6,522.73 mi (10,497.32 km) |
