| West Lafayette to Orbetello | 4,767.91 mi (7,673.21 km) |
| West Lafayette to Oria | 5,112.08 mi (8,227.09 km) |
| West Lafayette to Oristano | 4,760.33 mi (7,661.01 km) |
| West Lafayette to Orta Nova | 4,998.10 mi (8,043.67 km) |
| West Lafayette to Orte | 4,815.15 mi (7,749.24 km) |
| West Lafayette to Ortona | 4,901.48 mi (7,888.16 km) |
| West Lafayette to Orvieto | 4,793.25 mi (7,713.99 km) |
| West Lafayette to Orzinuovi | 4,597.57 mi (7,399.07 km) |
| West Lafayette to Osimo | 4,817.03 mi (7,752.26 km) |
| West Lafayette to Ospitaletto | 4,597.07 mi (7,398.26 km) |
| West Lafayette to Ostuni | 5,099.72 mi (8,207.21 km) |
| West Lafayette to Ottaviano | 4,968.55 mi (7,996.11 km) |
| West Lafayette to Ovada | 4,575.32 mi (7,363.26 km) |
| West Lafayette to Ozieri | 4,750.58 mi (7,645.32 km) |
| West Lafayette to Paceco | 5,010.15 mi (8,063.05 km) |
