| Gross-Gerau to Navodari | 1,018.34 mi (1,638.86 km) |
| Gross-Gerau to Negresti-Oas | 691.99 mi (1,113.66 km) |
| Gross-Gerau to Nehoiu | 884.96 mi (1,424.20 km) |
| Gross-Gerau to Ocna Mures | 747.85 mi (1,203.54 km) |
| Gross-Gerau to Odobesti | 905.39 mi (1,457.08 km) |
| Gross-Gerau to Odorheiu Secuiesc | 812.68 mi (1,307.89 km) |
| Gross-Gerau to Oltenita | 942.24 mi (1,516.40 km) |
| Gross-Gerau to Onesti | 878.40 mi (1,413.64 km) |
| Gross-Gerau to Oradea | 644.83 mi (1,037.75 km) |
| Gross-Gerau to Orastie | 735.95 mi (1,184.39 km) |
| Gross-Gerau to Oravita | 701.17 mi (1,128.42 km) |
| Gross-Gerau to Orsova | 742.19 mi (1,194.45 km) |
| Gross-Gerau to Otelu Rosu | 711.29 mi (1,144.71 km) |
| Gross-Gerau to Otopeni | 901.72 mi (1,451.18 km) |
| Gross-Gerau to Ovidiu | 1,017.79 mi (1,637.97 km) |
