| Weener to Navodari | 1,138.63 mi (1,832.44 km) |
| Weener to Negresti-Oas | 792.76 mi (1,275.83 km) |
| Weener to Nehoiu | 1,006.05 mi (1,619.08 km) |
| Weener to Ocna Mures | 869.53 mi (1,399.38 km) |
| Weener to Odobesti | 1,017.27 mi (1,637.14 km) |
| Weener to Odorheiu Secuiesc | 927.01 mi (1,491.88 km) |
| Weener to Oltenita | 1,075.64 mi (1,731.08 km) |
| Weener to Onesti | 985.52 mi (1,586.05 km) |
| Weener to Oradea | 768.36 mi (1,236.56 km) |
| Weener to Orastie | 869.25 mi (1,398.93 km) |
| Weener to Oravita | 854.86 mi (1,375.76 km) |
| Weener to Orsova | 894.67 mi (1,439.82 km) |
| Weener to Otelu Rosu | 854.52 mi (1,375.22 km) |
| Weener to Otopeni | 1,033.39 mi (1,663.08 km) |
| Weener to Ovidiu | 1,138.88 mi (1,832.85 km) |
