| Kazanlak to Obernburg am Main | 920.58 mi (1,481.53 km) |
| Kazanlak to Obernkirchen | 1,007.52 mi (1,621.45 km) |
| Kazanlak to Oberschleissheim | 773.79 mi (1,245.30 km) |
| Kazanlak to Oberstdorf | 807.65 mi (1,299.79 km) |
| Kazanlak to Obertraubling | 772.15 mi (1,242.66 km) |
| Kazanlak to Obertshausen | 939.86 mi (1,512.56 km) |
| Kazanlak to Oberursel | 954.26 mi (1,535.73 km) |
| Kazanlak to Ochsenfurt | 877.84 mi (1,412.74 km) |
| Kazanlak to Ochsenhausen | 837.66 mi (1,348.09 km) |
| Kazanlak to Ochtrup | 1,073.72 mi (1,727.99 km) |
| Kazanlak to Odenthal | 1,037.30 mi (1,669.37 km) |
| Kazanlak to Oelde | 1,025.49 mi (1,650.37 km) |
| Kazanlak to Oelsnitz | 826.28 mi (1,329.78 km) |
| Kazanlak to Oer-Erkenschwick | 1,052.00 mi (1,693.03 km) |
| Kazanlak to Oerlinghausen | 1,011.80 mi (1,628.34 km) |
