| Sempeter pri Gorici to Oerlinghausen | 474.02 mi (762.86 km) |
| Sempeter pri Gorici to Oestrich-Winkel | 383.42 mi (617.05 km) |
| Sempeter pri Gorici to Offenburg | 319.99 mi (514.98 km) |
| Sempeter pri Gorici to Oftersheim | 334.35 mi (538.08 km) |
| Sempeter pri Gorici to Ohrdruf | 363.77 mi (585.43 km) |
| Sempeter pri Gorici to Ohringen | 297.08 mi (478.10 km) |
| Sempeter pri Gorici to Olbernhau | 327.68 mi (527.35 km) |
| Sempeter pri Gorici to Olching | 191.21 mi (307.72 km) |
| Sempeter pri Gorici to Oldenburg | 554.32 mi (892.09 km) |
| Sempeter pri Gorici to Oldenburg in Holstein | 591.04 mi (951.18 km) |
| Sempeter pri Gorici to Olfen | 490.42 mi (789.26 km) |
| Sempeter pri Gorici to Olpe | 440.50 mi (708.91 km) |
| Sempeter pri Gorici to Olsberg | 442.14 mi (711.55 km) |
| Sempeter pri Gorici to Oranienburg | 471.97 mi (759.57 km) |
| Sempeter pri Gorici to Ortenberg | 371.61 mi (598.05 km) |
