| Oosterhout to Navodari | 1,202.41 mi (1,935.09 km) |
| Oosterhout to Negresti-Oas | 866.07 mi (1,393.81 km) |
| Oosterhout to Nehoiu | 1,068.72 mi (1,719.94 km) |
| Oosterhout to Ocna Mures | 931.01 mi (1,498.32 km) |
| Oosterhout to Odobesti | 1,085.71 mi (1,747.28 km) |
| Oosterhout to Odorheiu Secuiesc | 993.43 mi (1,598.77 km) |
| Oosterhout to Oltenita | 1,130.55 mi (1,819.45 km) |
| Oosterhout to Onesti | 1,056.63 mi (1,700.48 km) |
| Oosterhout to Oradea | 827.87 mi (1,332.33 km) |
| Oosterhout to Orastie | 923.21 mi (1,485.76 km) |
| Oosterhout to Oravita | 894.35 mi (1,439.31 km) |
| Oosterhout to Orsova | 935.25 mi (1,505.14 km) |
| Oosterhout to Otelu Rosu | 901.60 mi (1,450.98 km) |
| Oosterhout to Otopeni | 1,089.29 mi (1,753.05 km) |
| Oosterhout to Ovidiu | 1,202.15 mi (1,934.67 km) |
