| Oliveira de Frades to Navodari | 1,874.40 mi (3,016.56 km) |
| Oliveira de Frades to Negresti-Oas | 1,626.33 mi (2,617.33 km) |
| Oliveira de Frades to Nehoiu | 1,757.02 mi (2,827.65 km) |
| Oliveira de Frades to Ocna Mures | 1,639.57 mi (2,638.63 km) |
| Oliveira de Frades to Odobesti | 1,793.01 mi (2,885.58 km) |
| Oliveira de Frades to Odorheiu Secuiesc | 1,708.16 mi (2,749.01 km) |
| Oliveira de Frades to Oltenita | 1,778.30 mi (2,861.90 km) |
| Oliveira de Frades to Onesti | 1,778.20 mi (2,861.74 km) |
| Oliveira de Frades to Oradea | 1,551.04 mi (2,496.16 km) |
| Oliveira de Frades to Orastie | 1,606.80 mi (2,585.89 km) |
| Oliveira de Frades to Oravita | 1,532.37 mi (2,466.10 km) |
| Oliveira de Frades to Orsova | 1,567.17 mi (2,522.11 km) |
| Oliveira de Frades to Otelu Rosu | 1,565.37 mi (2,519.22 km) |
| Oliveira de Frades to Otopeni | 1,748.09 mi (2,813.28 km) |
| Oliveira de Frades to Ovidiu | 1,872.11 mi (3,012.87 km) |
