| Heidenheim to Oestrich-Winkel | 133.31 mi (214.55 km) |
| Heidenheim to Offenburg | 102.57 mi (165.06 km) |
| Heidenheim to Oftersheim | 85.79 mi (138.07 km) |
| Heidenheim to Ohrdruf | 150.91 mi (242.87 km) |
| Heidenheim to Ohringen | 46.82 mi (75.35 km) |
| Heidenheim to Olbernhau | 197.76 mi (318.26 km) |
| Heidenheim to Olching | 62.61 mi (100.77 km) |
| Heidenheim to Oldenburg | 320.03 mi (515.04 km) |
| Heidenheim to Oldenburg in Holstein | 389.83 mi (627.37 km) |
| Heidenheim to Olfen | 243.18 mi (391.37 km) |
| Heidenheim to Olpe | 191.94 mi (308.89 km) |
| Heidenheim to Olsberg | 199.08 mi (320.38 km) |
| Heidenheim to Oranienburg | 312.32 mi (502.63 km) |
| Heidenheim to Ortenberg | 126.09 mi (202.92 km) |
| Heidenheim to Oschatz | 223.75 mi (360.09 km) |
