| Drobeta-Turnu Severin to Nuth | 888.49 mi (1,429.88 km) |
| Drobeta-Turnu Severin to Oegstgeest | 979.56 mi (1,576.45 km) |
| Drobeta-Turnu Severin to Oirschot | 927.64 mi (1,492.89 km) |
| Drobeta-Turnu Severin to Oisterwijk | 933.90 mi (1,502.97 km) |
| Drobeta-Turnu Severin to Oldebroek | 933.83 mi (1,502.85 km) |
| Drobeta-Turnu Severin to Oldenzaal | 891.36 mi (1,434.50 km) |
| Drobeta-Turnu Severin to Ommen | 917.12 mi (1,475.96 km) |
| Drobeta-Turnu Severin to Oosterend | 946.81 mi (1,523.74 km) |
| Drobeta-Turnu Severin to Oosterhout | 949.04 mi (1,527.33 km) |
| Drobeta-Turnu Severin to Oosterwolde | 938.33 mi (1,510.09 km) |
| Drobeta-Turnu Severin to Oostzaan | 971.23 mi (1,563.04 km) |
| Drobeta-Turnu Severin to Opmeer | 977.14 mi (1,572.56 km) |
| Drobeta-Turnu Severin to Oss | 926.88 mi (1,491.66 km) |
| Drobeta-Turnu Severin to Oud-Beijerland | 971.76 mi (1,563.89 km) |
| Drobeta-Turnu Severin to Oudenbosch | 960.69 mi (1,546.08 km) |
