| Opera to Oberkirch | 224.10 mi (360.66 km) |
| Opera to Obernburg am Main | 307.95 mi (495.59 km) |
| Opera to Obernkirchen | 475.60 mi (765.40 km) |
| Opera to Oberschleissheim | 227.08 mi (365.45 km) |
| Opera to Oberstdorf | 148.88 mi (239.60 km) |
| Opera to Obertraubling | 283.62 mi (456.44 km) |
| Opera to Obertshausen | 324.08 mi (521.56 km) |
| Opera to Oberursel | 334.35 mi (538.08 km) |
| Opera to Ochsenfurt | 297.45 mi (478.70 km) |
| Opera to Ochsenhausen | 188.98 mi (304.14 km) |
| Opera to Ochtrup | 480.26 mi (772.91 km) |
| Opera to Odenthal | 402.13 mi (647.16 km) |
| Opera to Oelde | 448.29 mi (721.46 km) |
| Opera to Oelsnitz | 373.58 mi (601.22 km) |
| Opera to Oer-Erkenschwick | 441.67 mi (710.79 km) |
