| Del City to Orbetello | 5,424.98 mi (8,730.67 km) |
| Del City to Oria | 5,765.56 mi (9,278.77 km) |
| Del City to Oristano | 5,423.38 mi (8,728.09 km) |
| Del City to Orta Nova | 5,652.34 mi (9,096.57 km) |
| Del City to Orte | 5,470.99 mi (8,804.71 km) |
| Del City to Ortona | 5,555.30 mi (8,940.40 km) |
| Del City to Orvieto | 5,448.90 mi (8,769.16 km) |
| Del City to Orzinuovi | 5,250.17 mi (8,449.33 km) |
| Del City to Osimo | 5,469.67 mi (8,802.58 km) |
| Del City to Ospitaletto | 5,249.18 mi (8,447.74 km) |
| Del City to Ostuni | 5,752.82 mi (9,258.27 km) |
| Del City to Ottaviano | 5,625.04 mi (9,052.63 km) |
| Del City to Ovada | 5,230.82 mi (8,418.19 km) |
| Del City to Ozieri | 5,412.47 mi (8,710.52 km) |
| Del City to Paceco | 5,672.66 mi (9,129.26 km) |
