| Bad Oeynhausen to Oestrich-Winkel | 155.92 mi (250.92 km) |
| Bad Oeynhausen to Offenburg | 260.76 mi (419.65 km) |
| Bad Oeynhausen to Oftersheim | 195.72 mi (314.98 km) |
| Bad Oeynhausen to Ohrdruf | 126.05 mi (202.86 km) |
| Bad Oeynhausen to Ohringen | 209.53 mi (337.20 km) |
| Bad Oeynhausen to Olbernhau | 222.10 mi (357.44 km) |
| Bad Oeynhausen to Olching | 297.90 mi (479.42 km) |
| Bad Oeynhausen to Oldenburg | 69.69 mi (112.15 km) |
| Bad Oeynhausen to Oldenburg in Holstein | 168.71 mi (271.52 km) |
| Bad Oeynhausen to Olfen | 68.94 mi (110.96 km) |
| Bad Oeynhausen to Olpe | 91.68 mi (147.54 km) |
| Bad Oeynhausen to Olsberg | 60.27 mi (96.99 km) |
| Bad Oeynhausen to Oranienburg | 190.57 mi (306.70 km) |
| Bad Oeynhausen to Ortenberg | 127.90 mi (205.83 km) |
| Bad Oeynhausen to Oschatz | 194.41 mi (312.87 km) |
