| Omurtag to Obernburg am Main | 941.61 mi (1,515.38 km) |
| Omurtag to Obernkirchen | 1,019.58 mi (1,640.86 km) |
| Omurtag to Oberschleissheim | 798.56 mi (1,285.16 km) |
| Omurtag to Oberstdorf | 837.57 mi (1,347.94 km) |
| Omurtag to Obertraubling | 792.79 mi (1,275.87 km) |
| Omurtag to Obertshausen | 960.37 mi (1,545.57 km) |
| Omurtag to Oberursel | 974.54 mi (1,568.36 km) |
| Omurtag to Ochsenfurt | 898.49 mi (1,445.99 km) |
| Omurtag to Ochsenhausen | 865.04 mi (1,392.15 km) |
| Omurtag to Ochtrup | 1,088.44 mi (1,751.68 km) |
| Omurtag to Odenthal | 1,056.14 mi (1,699.69 km) |
| Omurtag to Oelde | 1,040.34 mi (1,674.26 km) |
| Omurtag to Oelsnitz | 840.59 mi (1,352.80 km) |
| Omurtag to Oer-Erkenschwick | 1,068.57 mi (1,719.70 km) |
| Omurtag to Oerlinghausen | 1,025.52 mi (1,650.42 km) |
