| Ostringen to Navodari | 997.26 mi (1,604.93 km) |
| Ostringen to Negresti-Oas | 678.35 mi (1,091.71 km) |
| Ostringen to Nehoiu | 864.46 mi (1,391.21 km) |
| Ostringen to Ocna Mures | 728.30 mi (1,172.09 km) |
| Ostringen to Odobesti | 887.03 mi (1,427.54 km) |
| Ostringen to Odorheiu Secuiesc | 794.42 mi (1,278.50 km) |
| Ostringen to Oltenita | 918.32 mi (1,477.89 km) |
| Ostringen to Onesti | 861.40 mi (1,386.29 km) |
| Ostringen to Oradea | 625.93 mi (1,007.34 km) |
| Ostringen to Orastie | 713.51 mi (1,148.28 km) |
| Ostringen to Oravita | 673.61 mi (1,084.07 km) |
| Ostringen to Orsova | 714.63 mi (1,150.09 km) |
| Ostringen to Otelu Rosu | 686.46 mi (1,104.75 km) |
| Ostringen to Otopeni | 878.46 mi (1,413.75 km) |
| Ostringen to Ovidiu | 996.51 mi (1,603.73 km) |
