| Placerville to Orbetello | 6,072.27 mi (9,772.37 km) |
| Placerville to Oria | 6,366.74 mi (10,246.29 km) |
| Placerville to Oristano | 6,132.74 mi (9,869.70 km) |
| Placerville to Orta Nova | 6,265.05 mi (10,082.62 km) |
| Placerville to Orte | 6,105.46 mi (9,825.79 km) |
| Placerville to Ortona | 6,169.26 mi (9,928.46 km) |
| Placerville to Orvieto | 6,082.82 mi (9,789.35 km) |
| Placerville to Orzinuovi | 5,869.27 mi (9,445.67 km) |
| Placerville to Osimo | 6,078.37 mi (9,782.20 km) |
| Placerville to Ospitaletto | 5,864.65 mi (9,438.24 km) |
| Placerville to Ostuni | 6,351.60 mi (10,221.91 km) |
| Placerville to Ottaviano | 6,258.06 mi (10,071.37 km) |
| Placerville to Ovada | 5,873.70 mi (9,452.81 km) |
| Placerville to Ozieri | 6,108.31 mi (9,830.37 km) |
| Placerville to Paceco | 6,364.93 mi (10,243.36 km) |
