| Kazanlak to Oestrich-Winkel | 971.11 mi (1,562.84 km) |
| Kazanlak to Offenburg | 934.05 mi (1,503.21 km) |
| Kazanlak to Oftersheim | 929.34 mi (1,495.62 km) |
| Kazanlak to Ohrdruf | 894.15 mi (1,439.00 km) |
| Kazanlak to Ohringen | 886.89 mi (1,427.31 km) |
| Kazanlak to Olbernhau | 796.25 mi (1,281.44 km) |
| Kazanlak to Olching | 782.81 mi (1,259.81 km) |
| Kazanlak to Oldenburg | 1,073.47 mi (1,727.58 km) |
| Kazanlak to Oldenburg in Holstein | 1,041.79 mi (1,676.61 km) |
| Kazanlak to Olfen | 1,049.59 mi (1,689.15 km) |
| Kazanlak to Olpe | 1,009.17 mi (1,624.10 km) |
| Kazanlak to Olsberg | 995.98 mi (1,602.88 km) |
| Kazanlak to Oranienburg | 897.87 mi (1,444.99 km) |
| Kazanlak to Ortenberg | 940.42 mi (1,513.46 km) |
| Kazanlak to Oschatz | 832.16 mi (1,339.23 km) |
