| Neu Isenburg to Navodari | 1,011.45 mi (1,627.77 km) |
| Neu Isenburg to Negresti-Oas | 683.54 mi (1,100.05 km) |
| Neu Isenburg to Nehoiu | 877.97 mi (1,412.95 km) |
| Neu Isenburg to Ocna Mures | 740.69 mi (1,192.03 km) |
| Neu Isenburg to Odobesti | 897.88 mi (1,445.00 km) |
| Neu Isenburg to Odorheiu Secuiesc | 805.19 mi (1,295.83 km) |
| Neu Isenburg to Oltenita | 936.11 mi (1,506.53 km) |
| Neu Isenburg to Onesti | 870.58 mi (1,401.07 km) |
| Neu Isenburg to Oradea | 637.59 mi (1,026.10 km) |
| Neu Isenburg to Orastie | 729.53 mi (1,174.06 km) |
| Neu Isenburg to Oravita | 696.17 mi (1,120.38 km) |
| Neu Isenburg to Orsova | 737.17 mi (1,186.37 km) |
| Neu Isenburg to Otelu Rosu | 705.52 mi (1,135.42 km) |
| Neu Isenburg to Otopeni | 895.43 mi (1,441.05 km) |
| Neu Isenburg to Ovidiu | 1,010.95 mi (1,626.96 km) |
