| Ystrad Mynach to Oberkirch | 545.28 mi (877.54 km) |
| Ystrad Mynach to Obernburg am Main | 554.78 mi (892.84 km) |
| Ystrad Mynach to Obernkirchen | 527.36 mi (848.70 km) |
| Ystrad Mynach to Oberschleissheim | 697.34 mi (1,122.26 km) |
| Ystrad Mynach to Oberstdorf | 671.80 mi (1,081.16 km) |
| Ystrad Mynach to Obertraubling | 703.14 mi (1,131.60 km) |
| Ystrad Mynach to Obertshausen | 537.10 mi (864.38 km) |
| Ystrad Mynach to Oberursel | 523.59 mi (842.64 km) |
| Ystrad Mynach to Ochsenfurt | 598.13 mi (962.60 km) |
| Ystrad Mynach to Ochsenhausen | 635.99 mi (1,023.53 km) |
| Ystrad Mynach to Ochtrup | 445.78 mi (717.41 km) |
| Ystrad Mynach to Odenthal | 448.66 mi (722.04 km) |
| Ystrad Mynach to Oelde | 487.05 mi (783.83 km) |
| Ystrad Mynach to Oelsnitz | 673.56 mi (1,083.99 km) |
| Ystrad Mynach to Oer-Erkenschwick | 449.45 mi (723.32 km) |
