| Olivares to Nasaud | 1,688.73 mi (2,717.75 km) |
| Olivares to Navodari | 1,862.71 mi (2,997.75 km) |
| Olivares to Negresti-Oas | 1,653.89 mi (2,661.69 km) |
| Olivares to Nehoiu | 1,755.78 mi (2,825.65 km) |
| Olivares to Ocna Mures | 1,650.69 mi (2,656.53 km) |
| Olivares to Odobesti | 1,795.73 mi (2,889.95 km) |
| Olivares to Odorheiu Secuiesc | 1,717.36 mi (2,763.83 km) |
| Olivares to Oltenita | 1,764.06 mi (2,838.98 km) |
| Olivares to Onesti | 1,786.00 mi (2,874.29 km) |
| Olivares to Oradea | 1,571.88 mi (2,529.69 km) |
| Olivares to Orastie | 1,612.57 mi (2,595.17 km) |
| Olivares to Oravita | 1,530.16 mi (2,462.55 km) |
| Olivares to Orsova | 1,560.84 mi (2,511.92 km) |
| Olivares to Otelu Rosu | 1,568.12 mi (2,523.64 km) |
| Olivares to Otopeni | 1,738.62 mi (2,798.04 km) |
