| Greenfield to Orbetello | 4,703.58 mi (7,569.68 km) |
| Greenfield to Oria | 5,042.86 mi (8,115.71 km) |
| Greenfield to Oristano | 4,706.41 mi (7,574.23 km) |
| Greenfield to Orta Nova | 4,929.87 mi (7,933.85 km) |
| Greenfield to Orte | 4,749.07 mi (7,642.89 km) |
| Greenfield to Ortona | 4,832.74 mi (7,777.54 km) |
| Greenfield to Orvieto | 4,726.92 mi (7,607.25 km) |
| Greenfield to Orzinuovi | 4,527.38 mi (7,286.11 km) |
| Greenfield to Osimo | 4,746.84 mi (7,639.29 km) |
| Greenfield to Ospitaletto | 4,526.29 mi (7,284.35 km) |
| Greenfield to Ostuni | 5,030.04 mi (8,095.07 km) |
| Greenfield to Ottaviano | 4,903.33 mi (7,891.15 km) |
| Greenfield to Ovada | 4,508.85 mi (7,256.29 km) |
| Greenfield to Ozieri | 4,694.27 mi (7,554.69 km) |
| Greenfield to Paceco | 4,954.94 mi (7,974.21 km) |
