| Karlsruhe to Navodari | 1,007.90 mi (1,622.06 km) |
| Karlsruhe to Negresti-Oas | 691.82 mi (1,113.38 km) |
| Karlsruhe to Nehoiu | 875.41 mi (1,408.83 km) |
| Karlsruhe to Ocna Mures | 739.71 mi (1,190.45 km) |
| Karlsruhe to Odobesti | 898.75 mi (1,446.40 km) |
| Karlsruhe to Odorheiu Secuiesc | 806.24 mi (1,297.52 km) |
| Karlsruhe to Oltenita | 927.88 mi (1,493.28 km) |
| Karlsruhe to Onesti | 873.61 mi (1,405.94 km) |
| Karlsruhe to Oradea | 637.69 mi (1,026.27 km) |
| Karlsruhe to Orastie | 723.84 mi (1,164.90 km) |
| Karlsruhe to Oravita | 681.81 mi (1,097.27 km) |
| Karlsruhe to Orsova | 722.79 mi (1,163.22 km) |
| Karlsruhe to Otelu Rosu | 695.84 mi (1,119.84 km) |
| Karlsruhe to Otopeni | 888.32 mi (1,429.62 km) |
| Karlsruhe to Ovidiu | 1,007.08 mi (1,620.74 km) |
