| Leavenworth to Orbetello | 5,140.36 mi (8,272.61 km) |
| Leavenworth to Oria | 5,478.13 mi (8,816.19 km) |
| Leavenworth to Oristano | 5,144.93 mi (8,279.96 km) |
| Leavenworth to Orta Nova | 5,365.49 mi (8,634.92 km) |
| Leavenworth to Orte | 5,185.39 mi (8,345.08 km) |
| Leavenworth to Ortona | 5,268.24 mi (8,478.41 km) |
| Leavenworth to Orvieto | 5,163.18 mi (8,309.33 km) |
| Leavenworth to Orzinuovi | 4,962.55 mi (7,986.46 km) |
| Leavenworth to Osimo | 5,181.91 mi (8,339.47 km) |
| Leavenworth to Ospitaletto | 4,961.27 mi (7,984.39 km) |
| Leavenworth to Ostuni | 5,465.16 mi (8,795.32 km) |
| Leavenworth to Ottaviano | 5,339.82 mi (8,593.62 km) |
| Leavenworth to Ovada | 4,945.15 mi (7,958.45 km) |
| Leavenworth to Ozieri | 5,132.53 mi (8,260.01 km) |
| Leavenworth to Paceco | 5,393.30 mi (8,679.68 km) |
