| Norfolk to Orbetello | 4,453.69 mi (7,167.52 km) |
| Norfolk to Oria | 4,808.73 mi (7,738.90 km) |
| Norfolk to Oristano | 4,413.92 mi (7,103.51 km) |
| Norfolk to Orta Nova | 4,693.15 mi (7,552.90 km) |
| Norfolk to Orte | 4,505.85 mi (7,251.47 km) |
| Norfolk to Ortona | 4,599.54 mi (7,402.25 km) |
| Norfolk to Orvieto | 4,485.07 mi (7,218.02 km) |
| Norfolk to Orzinuovi | 4,304.92 mi (6,928.10 km) |
| Norfolk to Osimo | 4,521.09 mi (7,275.99 km) |
| Norfolk to Ospitaletto | 4,306.38 mi (6,930.45 km) |
| Norfolk to Ostuni | 4,798.05 mi (7,721.71 km) |
| Norfolk to Ottaviano | 4,654.31 mi (7,490.38 km) |
| Norfolk to Ovada | 4,270.83 mi (6,873.24 km) |
| Norfolk to Ozieri | 4,411.57 mi (7,099.73 km) |
| Norfolk to Paceco | 4,664.27 mi (7,506.42 km) |
