| Harmanli to Oberriet | 882.87 mi (1,420.84 km) |
| Harmanli to Obersiggenthal | 943.16 mi (1,517.86 km) |
| Harmanli to Oberwil | 976.61 mi (1,571.71 km) |
| Harmanli to Oberwingert | 922.62 mi (1,484.82 km) |
| Harmanli to Oftringen | 956.53 mi (1,539.39 km) |
| Harmanli to Olten | 957.93 mi (1,541.64 km) |
| Harmanli to Onex | 1,022.94 mi (1,646.26 km) |
| Harmanli to Opfikon | 929.81 mi (1,496.38 km) |
| Harmanli to Ostermundigen | 969.33 mi (1,559.98 km) |
| Harmanli to Payerne | 992.60 mi (1,597.44 km) |
| Harmanli to Pfaffikon | 918.76 mi (1,478.60 km) |
| Harmanli to Plan-les-Ouates | 1,021.96 mi (1,644.69 km) |
| Harmanli to Pratteln | 970.17 mi (1,561.34 km) |
| Harmanli to Prilly | 1,003.90 mi (1,615.62 km) |
| Harmanli to Pully | 1,000.57 mi (1,610.26 km) |
