| Darmstadt to Navodari | 1,010.29 mi (1,625.91 km) |
| Darmstadt to Negresti-Oas | 684.23 mi (1,101.15 km) |
| Darmstadt to Nehoiu | 876.92 mi (1,411.27 km) |
| Darmstadt to Ocna Mures | 739.84 mi (1,190.65 km) |
| Darmstadt to Odobesti | 897.43 mi (1,444.27 km) |
| Darmstadt to Odorheiu Secuiesc | 804.72 mi (1,295.07 km) |
| Darmstadt to Oltenita | 934.13 mi (1,503.34 km) |
| Darmstadt to Onesti | 870.49 mi (1,400.91 km) |
| Darmstadt to Oradea | 636.83 mi (1,024.88 km) |
| Darmstadt to Orastie | 727.86 mi (1,171.38 km) |
| Darmstadt to Oravita | 693.02 mi (1,115.31 km) |
| Darmstadt to Orsova | 734.05 mi (1,181.34 km) |
| Darmstadt to Otelu Rosu | 703.16 mi (1,131.63 km) |
| Darmstadt to Otopeni | 893.62 mi (1,438.14 km) |
| Darmstadt to Ovidiu | 1,009.74 mi (1,625.01 km) |
