| Cities | Distance |
|---|---|
| Olbia to Navodari | 997.35 mi (1,605.07 km) |
| Olbia to Negresti-Oas | 836.64 mi (1,346.45 km) |
| Olbia to Nehoiu | 898.99 mi (1,446.79 km) |
| Olbia to Ocna Mures | 809.69 mi (1,303.07 km) |
| Olbia to Odobesti | 941.75 mi (1,515.60 km) |
| Olbia to Odorheiu Secuiesc | 871.92 mi (1,403.23 km) |
| Olbia to Oltenita | 898.17 mi (1,445.46 km) |
| Olbia to Onesti | 937.25 mi (1,508.36 km) |
| Olbia to Oradea | 748.30 mi (1,204.28 km) |
| Olbia to Orastie | 766.37 mi (1,233.35 km) |
| Olbia to Oravita | 677.73 mi (1,090.71 km) |
| Olbia to Orsova | 703.55 mi (1,132.26 km) |
| Olbia to Otelu Rosu | 719.92 mi (1,158.59 km) |
| Olbia to Otopeni | 875.82 mi (1,409.50 km) |
| Olbia to Ovidiu | 994.31 mi (1,600.18 km) |