| Oberhausen to Oestrich-Winkel | 114.59 mi (184.42 km) |
| Oberhausen to Offenburg | 214.60 mi (345.37 km) |
| Oberhausen to Oftersheim | 165.13 mi (265.74 km) |
| Oberhausen to Ohrdruf | 173.58 mi (279.35 km) |
| Oberhausen to Ohringen | 196.49 mi (316.23 km) |
| Oberhausen to Olbernhau | 286.22 mi (460.62 km) |
| Oberhausen to Olching | 301.75 mi (485.62 km) |
| Oberhausen to Oldenburg | 127.16 mi (204.65 km) |
| Oberhausen to Oldenburg in Holstein | 255.82 mi (411.71 km) |
| Oberhausen to Olfen | 26.74 mi (43.04 km) |
| Oberhausen to Olpe | 53.22 mi (85.65 km) |
| Oberhausen to Olsberg | 70.22 mi (113.00 km) |
| Oberhausen to Oranienburg | 283.57 mi (456.37 km) |
| Oberhausen to Ortenberg | 123.55 mi (198.83 km) |
| Oberhausen to Oschatz | 269.10 mi (433.08 km) |
