| Hoover to Orbetello | 5,073.21 mi (8,164.54 km) |
| Hoover to Oria | 5,425.57 mi (8,731.61 km) |
| Hoover to Oristano | 5,042.62 mi (8,115.31 km) |
| Hoover to Orta Nova | 5,310.25 mi (8,546.02 km) |
| Hoover to Orte | 5,123.92 mi (8,246.15 km) |
| Hoover to Ortona | 5,215.41 mi (8,393.39 km) |
| Hoover to Orvieto | 5,102.72 mi (8,212.04 km) |
| Hoover to Orzinuovi | 4,916.82 mi (7,912.86 km) |
| Hoover to Osimo | 5,134.72 mi (8,263.53 km) |
| Hoover to Ospitaletto | 4,917.59 mi (7,914.09 km) |
| Hoover to Ostuni | 5,414.30 mi (8,713.48 km) |
| Hoover to Ottaviano | 5,274.30 mi (8,488.17 km) |
| Hoover to Ovada | 4,886.72 mi (7,864.42 km) |
| Hoover to Ozieri | 5,038.30 mi (8,108.36 km) |
| Hoover to Paceco | 5,293.31 mi (8,518.76 km) |
