| Greeneville to Orbetello | 4,775.99 mi (7,686.22 km) |
| Greeneville to Oria | 5,128.28 mi (8,253.17 km) |
| Greeneville to Oristano | 4,746.30 mi (7,638.43 km) |
| Greeneville to Orta Nova | 5,012.97 mi (8,067.59 km) |
| Greeneville to Orte | 4,826.66 mi (7,767.75 km) |
| Greeneville to Ortona | 4,918.12 mi (7,914.95 km) |
| Greeneville to Orvieto | 4,805.45 mi (7,733.63 km) |
| Greeneville to Orzinuovi | 4,619.57 mi (7,434.49 km) |
| Greeneville to Osimo | 4,837.44 mi (7,785.11 km) |
| Greeneville to Ospitaletto | 4,620.36 mi (7,435.75 km) |
| Greeneville to Ostuni | 5,117.02 mi (8,235.04 km) |
| Greeneville to Ottaviano | 4,977.09 mi (8,009.86 km) |
| Greeneville to Ovada | 4,589.43 mi (7,385.98 km) |
| Greeneville to Ozieri | 4,741.68 mi (7,630.99 km) |
| Greeneville to Paceco | 4,997.02 mi (8,041.93 km) |
