| Monroeville to Orbetello | 4,467.29 mi (7,189.41 km) |
| Monroeville to Oria | 4,816.99 mi (7,752.19 km) |
| Monroeville to Oristano | 4,446.46 mi (7,155.89 km) |
| Monroeville to Orta Nova | 4,702.03 mi (7,567.19 km) |
| Monroeville to Orte | 4,516.74 mi (7,268.99 km) |
| Monroeville to Ortona | 4,606.44 mi (7,413.35 km) |
| Monroeville to Orvieto | 4,495.25 mi (7,234.41 km) |
| Monroeville to Orzinuovi | 4,305.67 mi (6,929.31 km) |
| Monroeville to Osimo | 4,524.34 mi (7,281.23 km) |
| Monroeville to Ospitaletto | 4,306.02 mi (6,929.87 km) |
| Monroeville to Ostuni | 4,805.32 mi (7,733.42 km) |
| Monroeville to Ottaviano | 4,668.45 mi (7,513.14 km) |
| Monroeville to Ovada | 4,278.28 mi (6,885.23 km) |
| Monroeville to Ozieri | 4,439.67 mi (7,144.96 km) |
| Monroeville to Paceco | 4,697.10 mi (7,559.25 km) |
