| Cortland to Orbetello | 4,229.68 mi (6,807.01 km) |
| Cortland to Oria | 4,578.98 mi (7,369.15 km) |
| Cortland to Oristano | 4,210.62 mi (6,776.34 km) |
| Cortland to Orta Nova | 4,464.07 mi (7,184.23 km) |
| Cortland to Orte | 4,278.94 mi (6,886.28 km) |
| Cortland to Ortona | 4,368.40 mi (7,030.25 km) |
| Cortland to Orvieto | 4,257.41 mi (6,851.65 km) |
| Cortland to Orzinuovi | 4,067.41 mi (6,545.87 km) |
| Cortland to Osimo | 4,286.15 mi (6,897.89 km) |
| Cortland to Ospitaletto | 4,067.72 mi (6,546.36 km) |
| Cortland to Ostuni | 4,567.26 mi (7,350.29 km) |
| Cortland to Ottaviano | 4,430.82 mi (7,130.72 km) |
| Cortland to Ovada | 4,040.34 mi (6,502.29 km) |
| Cortland to Ozieri | 4,203.33 mi (6,764.61 km) |
| Cortland to Paceco | 4,461.17 mi (7,179.56 km) |
