| Celje to Oberkirch | 371.49 mi (597.85 km) |
| Celje to Obernburg am Main | 376.76 mi (606.33 km) |
| Celje to Obernkirchen | 500.14 mi (804.90 km) |
| Celje to Oberschleissheim | 222.45 mi (357.99 km) |
| Celje to Oberstdorf | 249.34 mi (401.27 km) |
| Celje to Obertraubling | 237.54 mi (382.28 km) |
| Celje to Obertshausen | 397.27 mi (639.34 km) |
| Celje to Oberursel | 412.03 mi (663.10 km) |
| Celje to Ochsenfurt | 336.88 mi (542.16 km) |
| Celje to Ochsenhausen | 280.21 mi (450.96 km) |
| Celje to Ochtrup | 549.79 mi (884.80 km) |
| Celje to Odenthal | 497.86 mi (801.23 km) |
| Celje to Oelde | 503.02 mi (809.54 km) |
| Celje to Oelsnitz | 322.01 mi (518.23 km) |
| Celje to Oer-Erkenschwick | 520.87 mi (838.26 km) |
