| Cerkno to Oerlinghausen | 469.68 mi (755.88 km) |
| Cerkno to Oestrich-Winkel | 384.61 mi (618.97 km) |
| Cerkno to Offenburg | 326.50 mi (525.45 km) |
| Cerkno to Oftersheim | 336.41 mi (541.40 km) |
| Cerkno to Ohrdruf | 357.30 mi (575.01 km) |
| Cerkno to Ohringen | 297.77 mi (479.21 km) |
| Cerkno to Olbernhau | 315.02 mi (506.98 km) |
| Cerkno to Olching | 190.44 mi (306.49 km) |
| Cerkno to Oldenburg | 548.94 mi (883.44 km) |
| Cerkno to Oldenburg in Holstein | 580.94 mi (934.94 km) |
| Cerkno to Olfen | 488.55 mi (786.25 km) |
| Cerkno to Olpe | 439.39 mi (707.13 km) |
| Cerkno to Olsberg | 439.23 mi (706.87 km) |
| Cerkno to Oranienburg | 459.07 mi (738.79 km) |
| Cerkno to Ortenberg | 369.84 mi (595.20 km) |
