| Plattsburgh to Orbetello | 4,037.96 mi (6,498.47 km) |
| Plattsburgh to Oria | 4,386.09 mi (7,058.73 km) |
| Plattsburgh to Oristano | 4,022.67 mi (6,473.85 km) |
| Plattsburgh to Orta Nova | 4,271.37 mi (6,874.10 km) |
| Plattsburgh to Orte | 4,086.71 mi (6,576.92 km) |
| Plattsburgh to Ortona | 4,175.44 mi (6,719.72 km) |
| Plattsburgh to Orvieto | 4,065.08 mi (6,542.12 km) |
| Plattsburgh to Orzinuovi | 3,873.72 mi (6,234.15 km) |
| Plattsburgh to Osimo | 4,092.68 mi (6,586.53 km) |
| Plattsburgh to Ospitaletto | 3,873.86 mi (6,234.38 km) |
| Plattsburgh to Ostuni | 4,374.22 mi (7,039.63 km) |
| Plattsburgh to Ottaviano | 4,239.03 mi (6,822.05 km) |
| Plattsburgh to Ovada | 3,847.72 mi (6,192.31 km) |
| Plattsburgh to Ozieri | 4,014.44 mi (6,460.61 km) |
| Plattsburgh to Paceco | 4,272.99 mi (6,876.72 km) |
