| Barreiro to Navodari | 1,970.72 mi (3,171.56 km) |
| Barreiro to Negresti-Oas | 1,738.18 mi (2,797.34 km) |
| Barreiro to Nehoiu | 1,857.56 mi (2,989.45 km) |
| Barreiro to Ocna Mures | 1,744.94 mi (2,808.20 km) |
| Barreiro to Odobesti | 1,895.33 mi (3,050.23 km) |
| Barreiro to Odorheiu Secuiesc | 1,812.94 mi (2,917.64 km) |
| Barreiro to Oltenita | 1,873.24 mi (3,014.69 km) |
| Barreiro to Onesti | 1,882.59 mi (3,029.74 km) |
| Barreiro to Oradea | 1,660.03 mi (2,671.57 km) |
| Barreiro to Orastie | 1,709.85 mi (2,751.74 km) |
| Barreiro to Oravita | 1,631.80 mi (2,626.13 km) |
| Barreiro to Orsova | 1,664.94 mi (2,679.47 km) |
| Barreiro to Otelu Rosu | 1,667.02 mi (2,682.81 km) |
| Barreiro to Otopeni | 1,845.05 mi (2,969.32 km) |
| Barreiro to Ovidiu | 1,968.20 mi (3,167.51 km) |
