| Regensburg to Oberkirch | 185.15 mi (297.97 km) |
| Regensburg to Obernburg am Main | 143.91 mi (231.60 km) |
| Regensburg to Obernkirchen | 259.37 mi (417.41 km) |
| Regensburg to Oberschleissheim | 57.99 mi (93.32 km) |
| Regensburg to Oberstdorf | 138.66 mi (223.14 km) |
| Regensburg to Obertraubling | 5.17 mi (8.32 km) |
| Regensburg to Obertshausen | 162.75 mi (261.93 km) |
| Regensburg to Oberursel | 177.08 mi (284.98 km) |
| Regensburg to Ochsenfurt | 100.79 mi (162.20 km) |
| Regensburg to Ochsenhausen | 117.46 mi (189.03 km) |
| Regensburg to Ochtrup | 307.39 mi (494.70 km) |
| Regensburg to Odenthal | 260.72 mi (419.58 km) |
| Regensburg to Oelde | 260.40 mi (419.08 km) |
| Regensburg to Oelsnitz | 96.80 mi (155.79 km) |
| Regensburg to Oer-Erkenschwick | 279.79 mi (450.27 km) |
