| Wallenhorst to Oerlinghausen | 38.22 mi (61.50 km) |
| Wallenhorst to Oestrich-Winkel | 162.37 mi (261.31 km) |
| Wallenhorst to Offenburg | 268.34 mi (431.84 km) |
| Wallenhorst to Oftersheim | 207.34 mi (333.68 km) |
| Wallenhorst to Ohrdruf | 156.99 mi (252.65 km) |
| Wallenhorst to Ohringen | 227.08 mi (365.44 km) |
| Wallenhorst to Olbernhau | 256.43 mi (412.68 km) |
| Wallenhorst to Olching | 321.56 mi (517.50 km) |
| Wallenhorst to Oldenburg | 55.47 mi (89.27 km) |
| Wallenhorst to Oldenburg in Holstein | 179.27 mi (288.50 km) |
| Wallenhorst to Olfen | 51.38 mi (82.68 km) |
| Wallenhorst to Olpe | 92.46 mi (148.79 km) |
| Wallenhorst to Olsberg | 71.91 mi (115.72 km) |
| Wallenhorst to Oranienburg | 221.03 mi (355.71 km) |
| Wallenhorst to Ortenberg | 144.89 mi (233.17 km) |
