| Kardzhali to Olivenza | 1,716.18 mi (2,761.92 km) |
| Kardzhali to Olot | 1,173.28 mi (1,888.21 km) |
| Kardzhali to Onate | 1,415.62 mi (2,278.22 km) |
| Kardzhali to Onda | 1,340.54 mi (2,157.39 km) |
| Kardzhali to Onteniente | 1,378.52 mi (2,218.52 km) |
| Kardzhali to Orihuela | 1,411.29 mi (2,271.25 km) |
| Kardzhali to Osuna | 1,645.14 mi (2,647.60 km) |
| Kardzhali to Ourense | 1,696.16 mi (2,729.71 km) |
| Kardzhali to Oviedo | 1,584.92 mi (2,550.69 km) |
| Kardzhali to Paiporta | 1,357.49 mi (2,184.67 km) |
| Kardzhali to Pajara | 2,389.89 mi (3,846.16 km) |
| Kardzhali to Palafolls | 1,164.07 mi (1,873.39 km) |
| Kardzhali to Palafrugell | 1,140.88 mi (1,836.08 km) |
| Kardzhali to Palamos | 1,143.21 mi (1,839.81 km) |
| Kardzhali to Palencia | 1,531.59 mi (2,464.86 km) |
