| Harmanli to Olivenza | 1,742.27 mi (2,803.92 km) |
| Harmanli to Olot | 1,197.32 mi (1,926.90 km) |
| Harmanli to Onate | 1,438.02 mi (2,314.27 km) |
| Harmanli to Onda | 1,366.83 mi (2,199.71 km) |
| Harmanli to Onteniente | 1,405.90 mi (2,262.58 km) |
| Harmanli to Orihuela | 1,439.27 mi (2,316.27 km) |
| Harmanli to Osuna | 1,672.85 mi (2,692.19 km) |
| Harmanli to Ourense | 1,718.70 mi (2,765.97 km) |
| Harmanli to Oviedo | 1,606.59 mi (2,585.55 km) |
| Harmanli to Paiporta | 1,384.31 mi (2,227.83 km) |
| Harmanli to Pajara | 2,420.29 mi (3,895.08 km) |
| Harmanli to Palafolls | 1,188.85 mi (1,913.26 km) |
| Harmanli to Palafrugell | 1,165.37 mi (1,875.49 km) |
| Harmanli to Palamos | 1,167.79 mi (1,879.38 km) |
| Harmanli to Palencia | 1,554.93 mi (2,502.41 km) |
