| Oud-Beijerland to Navodari | 1,224.45 mi (1,970.56 km) |
| Oud-Beijerland to Negresti-Oas | 887.45 mi (1,428.22 km) |
| Oud-Beijerland to Nehoiu | 1,090.77 mi (1,755.42 km) |
| Oud-Beijerland to Ocna Mures | 953.05 mi (1,533.79 km) |
| Oud-Beijerland to Odobesti | 1,107.48 mi (1,782.32 km) |
| Oud-Beijerland to Odorheiu Secuiesc | 1,015.27 mi (1,633.92 km) |
| Oud-Beijerland to Oltenita | 1,152.93 mi (1,855.47 km) |
| Oud-Beijerland to Onesti | 1,078.25 mi (1,735.27 km) |
| Oud-Beijerland to Oradea | 849.94 mi (1,367.85 km) |
| Oud-Beijerland to Orastie | 945.55 mi (1,521.72 km) |
| Oud-Beijerland to Oravita | 917.09 mi (1,475.91 km) |
| Oud-Beijerland to Orsova | 957.97 mi (1,541.71 km) |
| Oud-Beijerland to Otelu Rosu | 924.15 mi (1,487.28 km) |
| Oud-Beijerland to Otopeni | 1,111.63 mi (1,788.99 km) |
| Oud-Beijerland to Ovidiu | 1,224.21 mi (1,970.18 km) |
