| Drobeta-Turnu Severin to Oerlinghausen | 816.07 mi (1,313.34 km) |
| Drobeta-Turnu Severin to Oestrich-Winkel | 778.11 mi (1,252.25 km) |
| Drobeta-Turnu Severin to Offenburg | 746.29 mi (1,201.04 km) |
| Drobeta-Turnu Severin to Oftersheim | 737.62 mi (1,187.08 km) |
| Drobeta-Turnu Severin to Ohrdruf | 698.53 mi (1,124.17 km) |
| Drobeta-Turnu Severin to Ohringen | 694.92 mi (1,118.37 km) |
| Drobeta-Turnu Severin to Olbernhau | 600.67 mi (966.68 km) |
| Drobeta-Turnu Severin to Olching | 592.67 mi (953.81 km) |
| Drobeta-Turnu Severin to Oldenburg | 877.89 mi (1,412.84 km) |
| Drobeta-Turnu Severin to Oldenburg in Holstein | 849.30 mi (1,366.82 km) |
| Drobeta-Turnu Severin to Olfen | 854.23 mi (1,374.75 km) |
| Drobeta-Turnu Severin to Olpe | 814.39 mi (1,310.63 km) |
| Drobeta-Turnu Severin to Olsberg | 800.60 mi (1,288.45 km) |
| Drobeta-Turnu Severin to Oranienburg | 705.27 mi (1,135.03 km) |
| Drobeta-Turnu Severin to Ortenberg | 746.02 mi (1,200.61 km) |
