| Willich to Oerlinghausen | 103.03 mi (165.81 km) |
| Willich to Oestrich-Winkel | 107.97 mi (173.77 km) |
| Willich to Offenburg | 202.80 mi (326.37 km) |
| Willich to Oftersheim | 158.61 mi (255.26 km) |
| Willich to Ohrdruf | 184.17 mi (296.40 km) |
| Willich to Ohringen | 193.18 mi (310.89 km) |
| Willich to Olbernhau | 297.96 mi (479.52 km) |
| Willich to Olching | 300.09 mi (482.95 km) |
| Willich to Oldenburg | 147.83 mi (237.91 km) |
| Willich to Oldenburg in Holstein | 277.09 mi (445.93 km) |
| Willich to Olfen | 47.64 mi (76.67 km) |
| Willich to Olpe | 58.21 mi (93.68 km) |
| Willich to Olsberg | 83.75 mi (134.79 km) |
| Willich to Oranienburg | 302.38 mi (486.63 km) |
| Willich to Ortenberg | 126.09 mi (202.93 km) |
