| Ocana to Nasaud | 1,475.07 mi (2,373.90 km) |
| Ocana to Navodari | 1,661.49 mi (2,673.91 km) |
| Ocana to Negresti-Oas | 1,437.91 mi (2,314.10 km) |
| Ocana to Nehoiu | 1,549.93 mi (2,494.38 km) |
| Ocana to Ocna Mures | 1,439.94 mi (2,317.36 km) |
| Ocana to Odobesti | 1,588.45 mi (2,556.36 km) |
| Ocana to Odorheiu Secuiesc | 1,507.47 mi (2,426.04 km) |
| Ocana to Oltenita | 1,563.71 mi (2,516.55 km) |
| Ocana to Onesti | 1,576.80 mi (2,537.61 km) |
| Ocana to Oradea | 1,357.69 mi (2,184.98 km) |
| Ocana to Orastie | 1,403.63 mi (2,258.92 km) |
| Ocana to Oravita | 1,324.02 mi (2,130.80 km) |
| Ocana to Orsova | 1,356.47 mi (2,183.04 km) |
| Ocana to Otelu Rosu | 1,360.17 mi (2,188.99 km) |
| Ocana to Otopeni | 1,536.12 mi (2,472.14 km) |
