| Hopkins to Orbetello | 4,825.34 mi (7,765.63 km) |
| Hopkins to Oria | 5,155.19 mi (8,296.47 km) |
| Hopkins to Oristano | 4,844.43 mi (7,796.35 km) |
| Hopkins to Orta Nova | 5,044.29 mi (8,118.00 km) |
| Hopkins to Orte | 4,867.81 mi (7,833.98 km) |
| Hopkins to Ortona | 4,946.76 mi (7,961.05 km) |
| Hopkins to Orvieto | 4,845.35 mi (7,797.84 km) |
| Hopkins to Orzinuovi | 4,640.42 mi (7,468.04 km) |
| Hopkins to Osimo | 4,858.85 mi (7,819.57 km) |
| Hopkins to Ospitaletto | 4,638.36 mi (7,464.73 km) |
| Hopkins to Ostuni | 5,141.66 mi (8,274.70 km) |
| Hopkins to Ottaviano | 5,022.78 mi (8,083.39 km) |
| Hopkins to Ovada | 4,628.06 mi (7,448.15 km) |
| Hopkins to Ozieri | 4,828.67 mi (7,771.00 km) |
| Hopkins to Paceco | 5,089.94 mi (8,191.47 km) |
