| Smolyan to Olivenza | 1,682.13 mi (2,707.13 km) |
| Smolyan to Olot | 1,140.07 mi (1,834.77 km) |
| Smolyan to Onate | 1,383.16 mi (2,225.98 km) |
| Smolyan to Onda | 1,306.44 mi (2,102.52 km) |
| Smolyan to Onteniente | 1,344.12 mi (2,163.15 km) |
| Smolyan to Orihuela | 1,376.75 mi (2,215.66 km) |
| Smolyan to Osuna | 1,610.65 mi (2,592.09 km) |
| Smolyan to Ourense | 1,663.60 mi (2,677.31 km) |
| Smolyan to Oviedo | 1,552.81 mi (2,499.01 km) |
| Smolyan to Paiporta | 1,323.24 mi (2,129.54 km) |
| Smolyan to Pajara | 2,355.18 mi (3,790.29 km) |
| Smolyan to Palafolls | 1,130.55 mi (1,819.45 km) |
| Smolyan to Palafrugell | 1,107.49 mi (1,782.33 km) |
| Smolyan to Palamos | 1,109.77 mi (1,786.00 km) |
| Smolyan to Palencia | 1,498.67 mi (2,411.87 km) |
