| McNair to Orbetello | 4,423.57 mi (7,119.05 km) |
| McNair to Oria | 4,776.28 mi (7,686.68 km) |
| McNair to Oristano | 4,393.23 mi (7,070.23 km) |
| McNair to Orta Nova | 4,660.91 mi (7,501.01 km) |
| McNair to Orte | 4,474.43 mi (7,200.91 km) |
| McNair to Ortona | 4,566.24 mi (7,348.65 km) |
| McNair to Orvieto | 4,453.29 mi (7,166.87 km) |
| McNair to Orzinuovi | 4,268.32 mi (6,869.19 km) |
| McNair to Osimo | 4,485.92 mi (7,219.39 km) |
| McNair to Ospitaletto | 4,269.23 mi (6,870.67 km) |
| McNair to Ostuni | 4,765.11 mi (7,668.70 km) |
| McNair to Ottaviano | 4,624.64 mi (7,442.64 km) |
| McNair to Ovada | 4,237.49 mi (6,819.59 km) |
| McNair to Ozieri | 4,388.65 mi (7,062.84 km) |
| McNair to Paceco | 4,643.96 mi (7,473.73 km) |
