| Drobeta-Turnu Severin to Oberkirch | 740.91 mi (1,192.38 km) |
| Drobeta-Turnu Severin to Obernburg am Main | 727.17 mi (1,170.26 km) |
| Drobeta-Turnu Severin to Obernkirchen | 811.78 mi (1,306.44 km) |
| Drobeta-Turnu Severin to Oberschleissheim | 583.14 mi (938.47 km) |
| Drobeta-Turnu Severin to Oberstdorf | 622.95 mi (1,002.54 km) |
| Drobeta-Turnu Severin to Obertraubling | 578.42 mi (930.88 km) |
| Drobeta-Turnu Severin to Obertshausen | 746.15 mi (1,200.82 km) |
| Drobeta-Turnu Severin to Oberursel | 760.43 mi (1,223.80 km) |
| Drobeta-Turnu Severin to Ochsenfurt | 684.18 mi (1,101.09 km) |
| Drobeta-Turnu Severin to Ochsenhausen | 649.71 mi (1,045.61 km) |
| Drobeta-Turnu Severin to Ochtrup | 878.10 mi (1,413.16 km) |
| Drobeta-Turnu Severin to Odenthal | 842.82 mi (1,356.38 km) |
| Drobeta-Turnu Severin to Oelde | 829.88 mi (1,335.56 km) |
| Drobeta-Turnu Severin to Oelsnitz | 630.57 mi (1,014.80 km) |
| Drobeta-Turnu Severin to Oer-Erkenschwick | 856.74 mi (1,378.79 km) |
