| Oswego to Orbetello | 4,771.88 mi (7,679.60 km) |
| Oswego to Oria | 5,112.89 mi (8,228.41 km) |
| Oswego to Oristano | 4,771.06 mi (7,678.28 km) |
| Oswego to Orta Nova | 4,999.54 mi (8,045.99 km) |
| Oswego to Orte | 4,817.98 mi (7,753.79 km) |
| Oswego to Ortona | 4,902.56 mi (7,889.91 km) |
| Oswego to Orvieto | 4,795.91 mi (7,718.27 km) |
| Oswego to Orzinuovi | 4,597.61 mi (7,399.14 km) |
| Oswego to Osimo | 4,817.13 mi (7,752.41 km) |
| Oswego to Ospitaletto | 4,596.72 mi (7,397.70 km) |
| Oswego to Ostuni | 5,100.22 mi (8,208.02 km) |
| Oswego to Ottaviano | 4,971.98 mi (8,001.63 km) |
| Oswego to Ovada | 4,577.83 mi (7,367.31 km) |
| Oswego to Ozieri | 4,759.77 mi (7,660.11 km) |
| Oswego to Paceco | 5,020.12 mi (8,079.10 km) |
