| Omurtag to Oestrich-Winkel | 992.78 mi (1,597.73 km) |
| Omurtag to Offenburg | 961.63 mi (1,547.59 km) |
| Omurtag to Oftersheim | 952.81 mi (1,533.41 km) |
| Omurtag to Ohrdruf | 909.15 mi (1,463.13 km) |
| Omurtag to Ohringen | 910.06 mi (1,464.60 km) |
| Omurtag to Olbernhau | 807.31 mi (1,299.24 km) |
| Omurtag to Olching | 808.12 mi (1,300.54 km) |
| Omurtag to Oldenburg | 1,083.81 mi (1,744.22 km) |
| Omurtag to Oldenburg in Holstein | 1,044.54 mi (1,681.02 km) |
| Omurtag to Olfen | 1,065.75 mi (1,715.16 km) |
| Omurtag to Olpe | 1,027.29 mi (1,653.26 km) |
| Omurtag to Olsberg | 1,012.13 mi (1,628.87 km) |
| Omurtag to Oranienburg | 901.27 mi (1,450.45 km) |
| Omurtag to Ortenberg | 959.55 mi (1,544.25 km) |
| Omurtag to Oschatz | 841.12 mi (1,353.65 km) |
