| McLean to Orbetello | 4,414.29 mi (7,104.12 km) |
| McLean to Oria | 4,767.13 mi (7,671.95 km) |
| McLean to Oristano | 4,383.53 mi (7,054.62 km) |
| McLean to Orta Nova | 4,651.74 mi (7,486.25 km) |
| McLean to Orte | 4,465.22 mi (7,186.07 km) |
| McLean to Ortona | 4,557.12 mi (7,333.97 km) |
| McLean to Orvieto | 4,444.09 mi (7,152.07 km) |
| McLean to Orzinuovi | 4,259.34 mi (6,854.75 km) |
| McLean to Osimo | 4,476.88 mi (7,204.85 km) |
| McLean to Ospitaletto | 4,260.29 mi (6,856.27 km) |
| McLean to Ostuni | 4,755.97 mi (7,654.00 km) |
| McLean to Ottaviano | 4,615.35 mi (7,427.68 km) |
| McLean to Ovada | 4,228.36 mi (6,804.89 km) |
| McLean to Ozieri | 4,379.04 mi (7,047.38 km) |
| McLean to Paceco | 4,634.25 mi (7,458.10 km) |
