| Cities | Distance |
|---|---|
| Opera to Navodari | 950.60 mi (1,529.85 km) |
| Opera to Negresti-Oas | 694.58 mi (1,117.81 km) |
| Opera to Nehoiu | 827.93 mi (1,332.42 km) |
| Opera to Ocna Mures | 706.66 mi (1,137.27 km) |
| Opera to Odobesti | 861.90 mi (1,387.10 km) |
| Opera to Odorheiu Secuiesc | 775.45 mi (1,247.97 km) |
| Opera to Oltenita | 857.98 mi (1,380.79 km) |
| Opera to Onesti | 845.60 mi (1,360.86 km) |
| Opera to Oradea | 617.63 mi (993.98 km) |
| Opera to Orastie | 675.68 mi (1,087.41 km) |
| Opera to Oravita | 606.77 mi (976.50 km) |
| Opera to Orsova | 644.17 mi (1,036.69 km) |
| Opera to Otelu Rosu | 636.07 mi (1,023.65 km) |
| Opera to Otopeni | 824.36 mi (1,326.69 km) |
| Opera to Ovidiu | 948.71 mi (1,526.81 km) |