| Greenlawn to Orbetello | 4,171.86 mi (6,713.96 km) |
| Greenlawn to Oria | 4,524.76 mi (7,281.89 km) |
| Greenlawn to Oristano | 4,141.48 mi (6,665.06 km) |
| Greenlawn to Orta Nova | 4,409.36 mi (7,096.18 km) |
| Greenlawn to Orte | 4,222.81 mi (6,795.95 km) |
| Greenlawn to Ortona | 4,314.78 mi (6,943.96 km) |
| Greenlawn to Orvieto | 4,201.69 mi (6,761.96 km) |
| Greenlawn to Orzinuovi | 4,017.20 mi (6,465.06 km) |
| Greenlawn to Osimo | 4,234.65 mi (6,815.01 km) |
| Greenlawn to Ospitaletto | 4,018.19 mi (6,466.65 km) |
| Greenlawn to Ostuni | 4,513.62 mi (7,263.98 km) |
| Greenlawn to Ottaviano | 4,372.91 mi (7,037.52 km) |
| Greenlawn to Ovada | 3,986.01 mi (6,414.87 km) |
| Greenlawn to Ozieri | 4,136.81 mi (6,657.55 km) |
| Greenlawn to Paceco | 4,392.21 mi (7,068.57 km) |
