| Korneuburg to Navodari | 647.48 mi (1,042.02 km) |
| Korneuburg to Negresti-Oas | 328.68 mi (528.97 km) |
| Korneuburg to Nehoiu | 514.07 mi (827.31 km) |
| Korneuburg to Ocna Mures | 377.05 mi (606.80 km) |
| Korneuburg to Odobesti | 535.19 mi (861.31 km) |
| Korneuburg to Odorheiu Secuiesc | 442.52 mi (712.16 km) |
| Korneuburg to Oltenita | 573.07 mi (922.27 km) |
| Korneuburg to Onesti | 509.32 mi (819.68 km) |
| Korneuburg to Oradea | 274.21 mi (441.30 km) |
| Korneuburg to Orastie | 365.93 mi (588.91 km) |
| Korneuburg to Oravita | 341.15 mi (549.02 km) |
| Korneuburg to Orsova | 381.37 mi (613.75 km) |
| Korneuburg to Otelu Rosu | 344.53 mi (554.46 km) |
| Korneuburg to Otopeni | 532.00 mi (856.17 km) |
| Korneuburg to Ovidiu | 646.96 mi (1,041.17 km) |
