| Neckargemund to Navodari | 996.09 mi (1,603.05 km) |
| Neckargemund to Negresti-Oas | 675.06 mi (1,086.40 km) |
| Neckargemund to Nehoiu | 863.10 mi (1,389.02 km) |
| Neckargemund to Ocna Mures | 726.62 mi (1,169.39 km) |
| Neckargemund to Odobesti | 885.07 mi (1,424.39 km) |
| Neckargemund to Odorheiu Secuiesc | 792.41 mi (1,275.26 km) |
| Neckargemund to Oltenita | 917.96 mi (1,477.32 km) |
| Neckargemund to Onesti | 859.06 mi (1,382.53 km) |
| Neckargemund to Oradea | 624.03 mi (1,004.28 km) |
| Neckargemund to Orastie | 712.66 mi (1,146.91 km) |
| Neckargemund to Oravita | 674.29 mi (1,085.17 km) |
| Neckargemund to Orsova | 715.33 mi (1,151.21 km) |
| Neckargemund to Otelu Rosu | 686.30 mi (1,104.50 km) |
| Neckargemund to Otopeni | 877.90 mi (1,412.84 km) |
| Neckargemund to Ovidiu | 995.40 mi (1,601.94 km) |
