| Royal Oak to Orbetello | 4,526.24 mi (7,284.28 km) |
| Royal Oak to Oria | 4,870.62 mi (7,838.50 km) |
| Royal Oak to Oristano | 4,518.82 mi (7,272.34 km) |
| Royal Oak to Orta Nova | 4,756.59 mi (7,654.99 km) |
| Royal Oak to Orte | 4,573.54 mi (7,360.40 km) |
| Royal Oak to Ortona | 4,660.00 mi (7,499.54 km) |
| Royal Oak to Orvieto | 4,551.65 mi (7,325.18 km) |
| Royal Oak to Orzinuovi | 4,356.22 mi (7,010.66 km) |
| Royal Oak to Osimo | 4,575.67 mi (7,363.82 km) |
| Royal Oak to Ospitaletto | 4,355.77 mi (7,009.93 km) |
| Royal Oak to Ostuni | 4,858.29 mi (7,818.67 km) |
| Royal Oak to Ottaviano | 4,726.90 mi (7,607.21 km) |
| Royal Oak to Ovada | 4,333.73 mi (6,974.47 km) |
| Royal Oak to Ozieri | 4,508.95 mi (7,256.46 km) |
| Royal Oak to Paceco | 4,768.58 mi (7,674.29 km) |
