| Belgrade to Oberkirch | 639.41 mi (1,029.02 km) |
| Belgrade to Obernburg am Main | 632.41 mi (1,017.77 km) |
| Belgrade to Obernkirchen | 729.08 mi (1,173.35 km) |
| Belgrade to Oberschleissheim | 484.17 mi (779.19 km) |
| Belgrade to Oberstdorf | 518.94 mi (835.15 km) |
| Belgrade to Obertraubling | 484.70 mi (780.05 km) |
| Belgrade to Obertshausen | 652.00 mi (1,049.29 km) |
| Belgrade to Oberursel | 666.52 mi (1,072.67 km) |
| Belgrade to Ochsenfurt | 590.02 mi (949.55 km) |
| Belgrade to Ochsenhausen | 547.98 mi (881.89 km) |
| Belgrade to Ochtrup | 791.14 mi (1,273.21 km) |
| Belgrade to Odenthal | 750.49 mi (1,207.80 km) |
| Belgrade to Oelde | 742.97 mi (1,195.70 km) |
| Belgrade to Oelsnitz | 545.92 mi (878.58 km) |
| Belgrade to Oer-Erkenschwick | 767.34 mi (1,234.91 km) |
