| Walnut to Orbetello | 6,249.28 mi (10,057.25 km) |
| Walnut to Oria | 6,558.96 mi (10,555.63 km) |
| Walnut to Oristano | 6,292.22 mi (10,126.34 km) |
| Walnut to Orta Nova | 6,453.28 mi (10,385.55 km) |
| Walnut to Orte | 6,286.34 mi (10,116.89 km) |
| Walnut to Ortona | 6,356.34 mi (10,229.54 km) |
| Walnut to Orvieto | 6,263.66 mi (10,080.39 km) |
| Walnut to Orzinuovi | 6,052.38 mi (9,740.37 km) |
| Walnut to Osimo | 6,266.11 mi (10,084.33 km) |
| Walnut to Ospitaletto | 6,048.72 mi (9,734.47 km) |
| Walnut to Ostuni | 6,544.34 mi (10,532.10 km) |
| Walnut to Ottaviano | 6,440.63 mi (10,365.19 km) |
| Walnut to Ovada | 6,050.27 mi (9,736.97 km) |
| Walnut to Ozieri | 6,271.61 mi (10,093.18 km) |
| Walnut to Paceco | 6,531.38 mi (10,511.24 km) |
