| Kardzhali to Novi di Modena | 760.25 mi (1,223.50 km) |
| Kardzhali to Novi Ligure | 860.57 mi (1,384.96 km) |
| Kardzhali to Nuoro | 840.10 mi (1,352.02 km) |
| Kardzhali to Occhiobello | 728.19 mi (1,171.92 km) |
| Kardzhali to Oderzo | 702.35 mi (1,130.32 km) |
| Kardzhali to Oggiono | 847.51 mi (1,363.94 km) |
| Kardzhali to Olbia | 824.20 mi (1,326.42 km) |
| Kardzhali to Oleggio | 878.35 mi (1,413.57 km) |
| Kardzhali to Olgiate Comasco | 865.46 mi (1,392.82 km) |
| Kardzhali to Olgiate Olona | 867.04 mi (1,395.37 km) |
| Kardzhali to Omegna | 893.19 mi (1,437.45 km) |
| Kardzhali to Opera | 847.59 mi (1,364.06 km) |
| Kardzhali to Oppeano | 753.31 mi (1,212.33 km) |
| Kardzhali to Orbassano | 923.56 mi (1,486.32 km) |
| Kardzhali to Orbetello | 727.45 mi (1,170.72 km) |
