| Kardzhali to Orzesze | 667.30 mi (1,073.92 km) |
| Kardzhali to Osowa | 937.45 mi (1,508.67 km) |
| Kardzhali to Ostroda | 869.02 mi (1,398.55 km) |
| Kardzhali to Ostroleka | 808.32 mi (1,300.87 km) |
| Kardzhali to Ostrow Mazowiecka | 787.13 mi (1,266.77 km) |
| Kardzhali to Ostrow Wielkopolski | 777.21 mi (1,250.79 km) |
| Kardzhali to Ostrowiec Swietokrzyski | 668.53 mi (1,075.90 km) |
| Kardzhali to Ostrzeszow | 760.79 mi (1,224.37 km) |
| Kardzhali to Oswiecim | 650.14 mi (1,046.30 km) |
| Kardzhali to Otwock | 748.34 mi (1,204.33 km) |
| Kardzhali to Ozarow Mazowiecki | 760.82 mi (1,224.43 km) |
| Kardzhali to Ozimek | 710.46 mi (1,143.38 km) |
| Kardzhali to Ozorkow | 768.01 mi (1,235.99 km) |
| Kardzhali to Pabianice | 746.32 mi (1,201.08 km) |
| Kardzhali to Parczew | 699.79 mi (1,126.20 km) |
