| Kardzhali to Opwijk | 1,191.98 mi (1,918.31 km) |
| Kardzhali to Ostend | 1,249.38 mi (2,010.68 km) |
| Kardzhali to Oud-Heverlee | 1,168.99 mi (1,881.31 km) |
| Kardzhali to Oud-Turnhout | 1,171.16 mi (1,884.80 km) |
| Kardzhali to Oudenaarde | 1,211.98 mi (1,950.49 km) |
| Kardzhali to Oudenburg | 1,245.02 mi (2,003.66 km) |
| Kardzhali to Oupeye | 1,126.76 mi (1,813.34 km) |
| Kardzhali to Overijse | 1,172.84 mi (1,887.51 km) |
| Kardzhali to Overpelt | 1,151.33 mi (1,852.88 km) |
| Kardzhali to Paal | 1,155.25 mi (1,859.19 km) |
| Kardzhali to Peer | 1,147.26 mi (1,846.34 km) |
| Kardzhali to Pepinster | 1,115.63 mi (1,795.43 km) |
| Kardzhali to Peruwelz | 1,203.78 mi (1,937.29 km) |
| Kardzhali to Perwez | 1,157.07 mi (1,862.12 km) |
| Kardzhali to Philippeville | 1,156.04 mi (1,860.47 km) |
