| Sermoneta to Oberkirch | 538.27 mi (866.26 km) |
| Sermoneta to Obernburg am Main | 601.83 mi (968.56 km) |
| Sermoneta to Obernkirchen | 762.29 mi (1,226.79 km) |
| Sermoneta to Oberschleissheim | 468.06 mi (753.28 km) |
| Sermoneta to Oberstdorf | 426.17 mi (685.86 km) |
| Sermoneta to Obertraubling | 513.91 mi (827.06 km) |
| Sermoneta to Obertshausen | 621.21 mi (999.74 km) |
| Sermoneta to Oberursel | 634.05 mi (1,020.41 km) |
| Sermoneta to Ochsenfurt | 577.02 mi (928.63 km) |
| Sermoneta to Ochsenhausen | 474.46 mi (763.57 km) |
| Sermoneta to Ochtrup | 784.79 mi (1,263.00 km) |
| Sermoneta to Odenthal | 712.02 mi (1,145.89 km) |
| Sermoneta to Oelde | 746.09 mi (1,200.72 km) |
| Sermoneta to Oelsnitz | 613.87 mi (987.93 km) |
| Sermoneta to Oer-Erkenschwick | 747.95 mi (1,203.72 km) |
