| Slovenj Gradec to Olivenza | 1,245.19 mi (2,003.94 km) |
| Slovenj Gradec to Olot | 689.14 mi (1,109.07 km) |
| Slovenj Gradec to Onate | 889.06 mi (1,430.81 km) |
| Slovenj Gradec to Onda | 892.78 mi (1,436.79 km) |
| Slovenj Gradec to Onteniente | 955.00 mi (1,536.93 km) |
| Slovenj Gradec to Orihuela | 1,001.68 mi (1,612.04 km) |
| Slovenj Gradec to Osuna | 1,214.76 mi (1,954.97 km) |
| Slovenj Gradec to Ourense | 1,163.70 mi (1,872.79 km) |
| Slovenj Gradec to Oviedo | 1,043.03 mi (1,678.59 km) |
| Slovenj Gradec to Paiporta | 921.27 mi (1,482.64 km) |
| Slovenj Gradec to Pajara | 2,014.21 mi (3,241.56 km) |
| Slovenj Gradec to Palafolls | 696.15 mi (1,120.34 km) |
| Slovenj Gradec to Palafrugell | 669.01 mi (1,076.67 km) |
| Slovenj Gradec to Palamos | 673.15 mi (1,083.33 km) |
| Slovenj Gradec to Palencia | 1,015.75 mi (1,634.70 km) |
