| McAlester to Orbetello | 5,382.55 mi (8,662.38 km) |
| McAlester to Oria | 5,725.65 mi (9,214.55 km) |
| McAlester to Oristano | 5,375.79 mi (8,651.49 km) |
| McAlester to Orta Nova | 5,611.92 mi (9,031.51 km) |
| McAlester to Orte | 5,429.45 mi (8,737.86 km) |
| McAlester to Ortona | 5,515.14 mi (8,875.76 km) |
| McAlester to Orvieto | 5,407.49 mi (8,702.52 km) |
| McAlester to Orzinuovi | 5,210.75 mi (8,385.89 km) |
| McAlester to Osimo | 5,430.26 mi (8,739.16 km) |
| McAlester to Ospitaletto | 5,210.06 mi (8,384.79 km) |
| McAlester to Ostuni | 5,713.16 mi (9,194.45 km) |
| McAlester to Ottaviano | 5,583.05 mi (8,985.05 km) |
| McAlester to Ovada | 5,189.48 mi (8,351.67 km) |
| McAlester to Ozieri | 5,366.04 mi (8,635.80 km) |
| McAlester to Paceco | 5,625.62 mi (9,053.56 km) |
