| Serramanna to Oberkirch | 630.84 mi (1,015.24 km) |
| Serramanna to Obernburg am Main | 719.84 mi (1,158.47 km) |
| Serramanna to Obernkirchen | 887.46 mi (1,428.22 km) |
| Serramanna to Oberschleissheim | 623.88 mi (1,004.04 km) |
| Serramanna to Oberstdorf | 556.01 mi (894.81 km) |
| Serramanna to Obertraubling | 678.50 mi (1,091.94 km) |
| Serramanna to Obertshausen | 735.43 mi (1,183.57 km) |
| Serramanna to Oberursel | 745.05 mi (1,199.04 km) |
| Serramanna to Ochsenfurt | 708.85 mi (1,140.79 km) |
| Serramanna to Ochsenhausen | 599.79 mi (965.27 km) |
| Serramanna to Ochtrup | 887.06 mi (1,427.59 km) |
| Serramanna to Odenthal | 806.94 mi (1,298.64 km) |
| Serramanna to Oelde | 858.28 mi (1,381.27 km) |
| Serramanna to Oelsnitz | 775.82 mi (1,248.56 km) |
| Serramanna to Oer-Erkenschwick | 848.08 mi (1,364.86 km) |
