| Gross-Zimmern to Navodari | 1,002.49 mi (1,613.35 km) |
| Gross-Zimmern to Negresti-Oas | 676.19 mi (1,088.23 km) |
| Gross-Zimmern to Nehoiu | 869.09 mi (1,398.67 km) |
| Gross-Zimmern to Ocna Mures | 731.98 mi (1,178.00 km) |
| Gross-Zimmern to Odobesti | 889.51 mi (1,431.53 km) |
| Gross-Zimmern to Odorheiu Secuiesc | 796.81 mi (1,282.34 km) |
| Gross-Zimmern to Oltenita | 926.48 mi (1,491.03 km) |
| Gross-Zimmern to Onesti | 862.53 mi (1,388.11 km) |
| Gross-Zimmern to Oradea | 628.96 mi (1,012.21 km) |
| Gross-Zimmern to Orastie | 720.14 mi (1,158.95 km) |
| Gross-Zimmern to Oravita | 685.65 mi (1,103.45 km) |
| Gross-Zimmern to Orsova | 726.67 mi (1,169.47 km) |
| Gross-Zimmern to Otelu Rosu | 695.59 mi (1,119.44 km) |
| Gross-Zimmern to Otopeni | 885.93 mi (1,425.77 km) |
| Gross-Zimmern to Ovidiu | 1,001.94 mi (1,612.46 km) |
