| Hatvan to Oberkirch | 537.43 mi (864.90 km) |
| Hatvan to Obernburg am Main | 502.02 mi (807.93 km) |
| Hatvan to Obernkirchen | 565.57 mi (910.20 km) |
| Hatvan to Oberschleissheim | 376.89 mi (606.54 km) |
| Hatvan to Oberstdorf | 438.11 mi (705.07 km) |
| Hatvan to Obertraubling | 356.04 mi (572.99 km) |
| Hatvan to Obertshausen | 519.08 mi (835.39 km) |
| Hatvan to Oberursel | 532.46 mi (856.92 km) |
| Hatvan to Ochsenfurt | 458.79 mi (738.34 km) |
| Hatvan to Ochsenhausen | 451.15 mi (726.05 km) |
| Hatvan to Ochtrup | 636.18 mi (1,023.83 km) |
| Hatvan to Odenthal | 609.99 mi (981.68 km) |
| Hatvan to Oelde | 588.36 mi (946.87 km) |
| Hatvan to Oelsnitz | 389.02 mi (626.07 km) |
| Hatvan to Oer-Erkenschwick | 618.57 mi (995.50 km) |
