| Bardstown to Orbetello | 4,819.46 mi (7,756.17 km) |
| Bardstown to Oria | 5,168.22 mi (8,317.45 km) |
| Bardstown to Oristano | 4,800.37 mi (7,725.46 km) |
| Bardstown to Orta Nova | 5,053.42 mi (8,132.70 km) |
| Bardstown to Orte | 4,868.52 mi (7,835.13 km) |
| Bardstown to Ortona | 4,957.59 mi (7,978.48 km) |
| Bardstown to Orvieto | 4,846.95 mi (7,800.42 km) |
| Bardstown to Orzinuovi | 4,656.05 mi (7,493.19 km) |
| Bardstown to Osimo | 4,874.98 mi (7,845.52 km) |
| Bardstown to Ospitaletto | 4,656.21 mi (7,493.44 km) |
| Bardstown to Ostuni | 5,156.41 mi (8,298.44 km) |
| Bardstown to Ottaviano | 5,020.58 mi (8,079.84 km) |
| Bardstown to Ovada | 4,629.73 mi (7,450.83 km) |
| Bardstown to Ozieri | 4,793.29 mi (7,714.06 km) |
| Bardstown to Paceco | 5,050.97 mi (8,128.75 km) |
