| Hiddenhausen to Oestrich-Winkel | 152.08 mi (244.74 km) |
| Hiddenhausen to Offenburg | 257.41 mi (414.27 km) |
| Hiddenhausen to Oftersheim | 193.20 mi (310.92 km) |
| Hiddenhausen to Ohrdruf | 129.75 mi (208.82 km) |
| Hiddenhausen to Ohringen | 208.59 mi (335.69 km) |
| Hiddenhausen to Olbernhau | 228.08 mi (367.06 km) |
| Hiddenhausen to Olching | 298.92 mi (481.07 km) |
| Hiddenhausen to Oldenburg | 69.60 mi (112.00 km) |
| Hiddenhausen to Oldenburg in Holstein | 174.66 mi (281.09 km) |
| Hiddenhausen to Olfen | 61.04 mi (98.24 km) |
| Hiddenhausen to Olpe | 86.28 mi (138.85 km) |
| Hiddenhausen to Olsberg | 56.72 mi (91.28 km) |
| Hiddenhausen to Oranienburg | 198.66 mi (319.72 km) |
| Hiddenhausen to Ortenberg | 126.55 mi (203.66 km) |
| Hiddenhausen to Oschatz | 201.22 mi (323.84 km) |
