| Kardzhali to Oberriet | 869.55 mi (1,399.40 km) |
| Kardzhali to Obersiggenthal | 929.54 mi (1,495.95 km) |
| Kardzhali to Oberwil | 962.71 mi (1,549.33 km) |
| Kardzhali to Oberwingert | 909.32 mi (1,463.41 km) |
| Kardzhali to Oftringen | 942.37 mi (1,516.60 km) |
| Kardzhali to Olten | 943.84 mi (1,518.96 km) |
| Kardzhali to Onex | 1,005.81 mi (1,618.69 km) |
| Kardzhali to Opfikon | 916.21 mi (1,474.50 km) |
| Kardzhali to Ostermundigen | 954.22 mi (1,535.66 km) |
| Kardzhali to Payerne | 977.00 mi (1,572.32 km) |
| Kardzhali to Pfaffikon | 905.13 mi (1,456.66 km) |
| Kardzhali to Plan-les-Ouates | 1,004.80 mi (1,617.08 km) |
| Kardzhali to Pratteln | 956.34 mi (1,539.09 km) |
| Kardzhali to Prilly | 987.61 mi (1,589.41 km) |
| Kardzhali to Pully | 984.26 mi (1,584.02 km) |
