| Owensboro to Orbetello | 4,892.61 mi (7,873.90 km) |
| Owensboro to Oria | 5,240.15 mi (8,433.21 km) |
| Owensboro to Oristano | 4,876.60 mi (7,848.12 km) |
| Owensboro to Orta Nova | 5,125.56 mi (8,248.79 km) |
| Owensboro to Orte | 4,941.17 mi (7,952.05 km) |
| Owensboro to Ortona | 5,029.47 mi (8,094.16 km) |
| Owensboro to Orvieto | 4,919.50 mi (7,917.18 km) |
| Owensboro to Orzinuovi | 4,727.15 mi (7,607.62 km) |
| Owensboro to Osimo | 4,946.30 mi (7,960.30 km) |
| Owensboro to Ospitaletto | 4,727.11 mi (7,607.56 km) |
| Owensboro to Ostuni | 5,228.17 mi (8,413.93 km) |
| Owensboro to Ottaviano | 5,093.65 mi (8,197.44 km) |
| Owensboro to Ovada | 4,702.01 mi (7,567.16 km) |
| Owensboro to Ozieri | 4,868.83 mi (7,835.62 km) |
| Owensboro to Paceco | 5,127.06 mi (8,251.20 km) |
