| Cities | Distance |
|---|---|
| Sierning to Navodari | 729.65 mi (1,174.26 km) |
| Sierning to Negresti-Oas | 421.65 mi (678.58 km) |
| Sierning to Nehoiu | 597.31 mi (961.28 km) |
| Sierning to Ocna Mures | 462.19 mi (743.82 km) |
| Sierning to Odobesti | 621.59 mi (1,000.36 km) |
| Sierning to Odorheiu Secuiesc | 529.37 mi (851.95 km) |
| Sierning to Oltenita | 650.15 mi (1,046.32 km) |
| Sierning to Onesti | 597.58 mi (961.71 km) |
| Sierning to Oradea | 361.03 mi (581.02 km) |
| Sierning to Orastie | 445.58 mi (717.09 km) |
| Sierning to Oravita | 407.10 mi (655.16 km) |
| Sierning to Orsova | 448.13 mi (721.20 km) |
| Sierning to Otelu Rosu | 418.38 mi (673.31 km) |
| Sierning to Otopeni | 610.30 mi (982.19 km) |
| Sierning to Ovidiu | 728.82 mi (1,172.92 km) |