| Humble to Orbetello | 5,598.20 mi (9,009.43 km) |
| Humble to Oria | 5,947.45 mi (9,571.50 km) |
| Humble to Oristano | 5,575.98 mi (8,973.67 km) |
| Humble to Orta Nova | 5,832.60 mi (9,386.66 km) |
| Humble to Orte | 5,647.51 mi (9,088.79 km) |
| Humble to Ortona | 5,736.84 mi (9,232.56 km) |
| Humble to Orvieto | 5,625.99 mi (9,054.15 km) |
| Humble to Orzinuovi | 5,435.43 mi (8,747.47 km) |
| Humble to Osimo | 5,654.33 mi (9,099.77 km) |
| Humble to Ospitaletto | 5,435.59 mi (8,747.74 km) |
| Humble to Ostuni | 5,935.68 mi (9,552.56 km) |
| Humble to Ottaviano | 5,799.35 mi (9,333.15 km) |
| Humble to Ovada | 5,408.87 mi (8,704.74 km) |
| Humble to Ozieri | 5,569.85 mi (8,963.81 km) |
| Humble to Paceco | 5,826.69 mi (9,377.16 km) |
