| Heilbronn to Obernburg am Main | 47.79 mi (76.92 km) |
| Heilbronn to Obernkirchen | 215.37 mi (346.60 km) |
| Heilbronn to Oberschleissheim | 123.89 mi (199.38 km) |
| Heilbronn to Oberstdorf | 129.79 mi (208.87 km) |
| Heilbronn to Obertraubling | 134.17 mi (215.93 km) |
| Heilbronn to Obertshausen | 65.62 mi (105.61 km) |
| Heilbronn to Oberursel | 78.20 mi (125.84 km) |
| Heilbronn to Ochsenfurt | 51.52 mi (82.91 km) |
| Heilbronn to Ochsenhausen | 81.62 mi (131.35 km) |
| Heilbronn to Ochtrup | 228.98 mi (368.51 km) |
| Heilbronn to Odenthal | 159.98 mi (257.46 km) |
| Heilbronn to Oelde | 191.23 mi (307.75 km) |
| Heilbronn to Oelsnitz | 158.03 mi (254.33 km) |
| Heilbronn to Oer-Erkenschwick | 192.72 mi (310.16 km) |
| Heilbronn to Oerlinghausen | 196.11 mi (315.60 km) |
