| Cities | Distance |
|---|---|
| Opera to Oria | 542.70 mi (873.39 km) |
| Opera to Oristano | 379.79 mi (611.21 km) |
| Opera to Orta Nova | 429.70 mi (691.53 km) |
| Opera to Orte | 256.21 mi (412.33 km) |
| Opera to Ortona | 332.43 mi (534.99 km) |
| Opera to Orvieto | 233.53 mi (375.83 km) |
| Opera to Orzinuovi | 34.79 mi (55.99 km) |
| Opera to Osimo | 248.03 mi (399.17 km) |
| Opera to Ospitaletto | 43.17 mi (69.48 km) |
| Opera to Ostuni | 530.21 mi (853.29 km) |
| Opera to Ottaviano | 410.31 mi (660.32 km) |
| Opera to Ovada | 58.47 mi (94.10 km) |
| Opera to Ozieri | 331.71 mi (533.84 km) |
| Opera to Paceco | 539.31 mi (867.94 km) |
| Opera to Pachino | 672.25 mi (1,081.88 km) |