| Fort Meade to Orbetello | 4,388.01 mi (7,061.82 km) |
| Fort Meade to Oria | 4,740.93 mi (7,629.78 km) |
| Fort Meade to Oristano | 4,357.02 mi (7,011.95 km) |
| Fort Meade to Orta Nova | 4,625.53 mi (7,444.07 km) |
| Fort Meade to Orte | 4,438.98 mi (7,143.84 km) |
| Fort Meade to Ortona | 4,530.94 mi (7,291.84 km) |
| Fort Meade to Orvieto | 4,417.86 mi (7,109.85 km) |
| Fort Meade to Orzinuovi | 4,233.27 mi (6,812.80 km) |
| Fort Meade to Osimo | 4,450.77 mi (7,162.82 km) |
| Fort Meade to Ospitaletto | 4,234.24 mi (6,814.35 km) |
| Fort Meade to Ostuni | 4,729.79 mi (7,611.86 km) |
| Fort Meade to Ottaviano | 4,589.06 mi (7,385.37 km) |
| Fort Meade to Ovada | 4,202.17 mi (6,762.75 km) |
| Fort Meade to Ozieri | 4,352.57 mi (7,004.79 km) |
| Fort Meade to Paceco | 4,607.74 mi (7,415.43 km) |
