| Walnut to Oerlinghausen | 5,674.59 mi (9,132.37 km) |
| Walnut to Oestrich-Winkel | 5,755.39 mi (9,262.41 km) |
| Walnut to Offenburg | 5,831.44 mi (9,384.80 km) |
| Walnut to Oftersheim | 5,805.14 mi (9,342.47 km) |
| Walnut to Ohrdruf | 5,792.51 mi (9,322.14 km) |
| Walnut to Ohringen | 5,841.41 mi (9,400.84 km) |
| Walnut to Olbernhau | 5,873.71 mi (9,452.82 km) |
| Walnut to Olching | 5,947.82 mi (9,572.10 km) |
| Walnut to Oldenburg | 5,601.75 mi (9,015.14 km) |
| Walnut to Oldenburg in Holstein | 5,614.87 mi (9,036.26 km) |
| Walnut to Olfen | 5,650.14 mi (9,093.01 km) |
| Walnut to Olpe | 5,698.76 mi (9,171.27 km) |
| Walnut to Olsberg | 5,700.83 mi (9,174.59 km) |
| Walnut to Oranienburg | 5,758.79 mi (9,267.87 km) |
| Walnut to Ortenberg | 5,768.54 mi (9,283.56 km) |
