| Hollabrunn to Navodari | 663.68 mi (1,068.09 km) |
| Hollabrunn to Negresti-Oas | 341.23 mi (549.16 km) |
| Hollabrunn to Nehoiu | 530.14 mi (853.18 km) |
| Hollabrunn to Ocna Mures | 392.83 mi (632.21 km) |
| Hollabrunn to Odobesti | 550.40 mi (885.79 km) |
| Hollabrunn to Odorheiu Secuiesc | 457.69 mi (736.59 km) |
| Hollabrunn to Oltenita | 590.27 mi (949.95 km) |
| Hollabrunn to Onesti | 523.95 mi (843.21 km) |
| Hollabrunn to Oradea | 289.76 mi (466.33 km) |
| Hollabrunn to Orastie | 382.94 mi (616.29 km) |
| Hollabrunn to Oravita | 359.77 mi (578.99 km) |
| Hollabrunn to Orsova | 399.89 mi (643.56 km) |
| Hollabrunn to Otelu Rosu | 362.43 mi (583.27 km) |
| Hollabrunn to Otopeni | 549.03 mi (883.58 km) |
| Hollabrunn to Ovidiu | 663.23 mi (1,067.36 km) |
