| Oupeye to Navodari | 1,153.22 mi (1,855.93 km) |
| Oupeye to Negresti-Oas | 822.77 mi (1,324.13 km) |
| Oupeye to Nehoiu | 1,019.67 mi (1,641.00 km) |
| Oupeye to Ocna Mures | 882.25 mi (1,419.85 km) |
| Oupeye to Odobesti | 1,038.93 mi (1,672.00 km) |
| Oupeye to Odorheiu Secuiesc | 946.30 mi (1,522.92 km) |
| Oupeye to Oltenita | 1,078.26 mi (1,735.29 km) |
| Oupeye to Onesti | 1,011.13 mi (1,627.26 km) |
| Oupeye to Oradea | 779.08 mi (1,253.81 km) |
| Oupeye to Orastie | 871.61 mi (1,402.71 km) |
| Oupeye to Oravita | 837.87 mi (1,348.42 km) |
| Oupeye to Orsova | 878.90 mi (1,414.45 km) |
| Oupeye to Otelu Rosu | 847.64 mi (1,364.15 km) |
| Oupeye to Otopeni | 1,037.54 mi (1,669.76 km) |
| Oupeye to Ovidiu | 1,152.76 mi (1,855.19 km) |
