| Nidderau to Navodari | 1,006.72 mi (1,620.16 km) |
| Nidderau to Negresti-Oas | 676.64 mi (1,088.94 km) |
| Nidderau to Nehoiu | 873.13 mi (1,405.17 km) |
| Nidderau to Ocna Mures | 735.67 mi (1,183.94 km) |
| Nidderau to Odobesti | 892.29 mi (1,436.00 km) |
| Nidderau to Odorheiu Secuiesc | 799.66 mi (1,286.92 km) |
| Nidderau to Oltenita | 932.46 mi (1,500.64 km) |
| Nidderau to Onesti | 864.57 mi (1,391.38 km) |
| Nidderau to Oradea | 632.48 mi (1,017.88 km) |
| Nidderau to Orastie | 725.53 mi (1,167.63 km) |
| Nidderau to Oravita | 694.15 mi (1,117.13 km) |
| Nidderau to Orsova | 735.10 mi (1,183.03 km) |
| Nidderau to Otelu Rosu | 702.44 mi (1,130.46 km) |
| Nidderau to Otopeni | 891.56 mi (1,434.82 km) |
| Nidderau to Ovidiu | 1,006.28 mi (1,619.46 km) |
