| Cerkno to Oberkirch | 322.60 mi (519.18 km) |
| Cerkno to Obernburg am Main | 340.56 mi (548.08 km) |
| Cerkno to Obernkirchen | 477.53 mi (768.51 km) |
| Cerkno to Oberschleissheim | 185.59 mi (298.69 km) |
| Cerkno to Oberstdorf | 196.70 mi (316.56 km) |
| Cerkno to Obertraubling | 213.71 mi (343.93 km) |
| Cerkno to Obertshausen | 361.35 mi (581.54 km) |
| Cerkno to Oberursel | 376.01 mi (605.13 km) |
| Cerkno to Ochsenfurt | 303.67 mi (488.72 km) |
| Cerkno to Ochsenhausen | 232.77 mi (374.61 km) |
| Cerkno to Ochtrup | 519.82 mi (836.58 km) |
| Cerkno to Odenthal | 461.78 mi (743.17 km) |
| Cerkno to Oelde | 474.58 mi (763.75 km) |
| Cerkno to Oelsnitz | 307.93 mi (495.56 km) |
| Cerkno to Oer-Erkenschwick | 488.38 mi (785.97 km) |
