| Mount Airy to Orbetello | 4,664.37 mi (7,506.58 km) |
| Mount Airy to Oria | 5,017.62 mi (8,075.07 km) |
| Mount Airy to Oristano | 4,631.53 mi (7,453.72 km) |
| Mount Airy to Orta Nova | 4,902.19 mi (7,889.31 km) |
| Mount Airy to Orte | 4,715.52 mi (7,588.90 km) |
| Mount Airy to Ortona | 4,807.71 mi (7,737.26 km) |
| Mount Airy to Orvieto | 4,694.44 mi (7,554.98 km) |
| Mount Airy to Orzinuovi | 4,510.31 mi (7,258.65 km) |
| Mount Airy to Osimo | 4,727.71 mi (7,608.52 km) |
| Mount Airy to Ospitaletto | 4,511.31 mi (7,260.26 km) |
| Mount Airy to Ostuni | 5,006.53 mi (8,057.24 km) |
| Mount Airy to Ottaviano | 4,865.37 mi (7,830.06 km) |
| Mount Airy to Ovada | 4,478.92 mi (7,208.13 km) |
| Mount Airy to Ozieri | 4,627.61 mi (7,447.42 km) |
| Mount Airy to Paceco | 4,882.18 mi (7,857.12 km) |
