| Ilirska Bistrica to Oerlinghausen | 509.73 mi (820.32 km) |
| Ilirska Bistrica to Oestrich-Winkel | 421.66 mi (678.60 km) |
| Ilirska Bistrica to Offenburg | 358.61 mi (577.12 km) |
| Ilirska Bistrica to Oftersheim | 372.78 mi (599.93 km) |
| Ilirska Bistrica to Ohrdruf | 397.84 mi (640.27 km) |
| Ilirska Bistrica to Ohringen | 335.15 mi (539.36 km) |
| Ilirska Bistrica to Olbernhau | 354.83 mi (571.04 km) |
| Ilirska Bistrica to Olching | 228.65 mi (367.97 km) |
| Ilirska Bistrica to Oldenburg | 589.30 mi (948.39 km) |
| Ilirska Bistrica to Oldenburg in Holstein | 621.47 mi (1,000.16 km) |
| Ilirska Bistrica to Olfen | 527.56 mi (849.02 km) |
| Ilirska Bistrica to Olpe | 477.97 mi (769.21 km) |
| Ilirska Bistrica to Olsberg | 478.71 mi (770.41 km) |
| Ilirska Bistrica to Oranienburg | 498.64 mi (802.49 km) |
| Ilirska Bistrica to Ortenberg | 408.76 mi (657.83 km) |
