| Birkerod to Navodari | 1,065.94 mi (1,715.46 km) |
| Birkerod to Negresti-Oas | 721.33 mi (1,160.87 km) |
| Birkerod to Nehoiu | 942.25 mi (1,516.40 km) |
| Birkerod to Ocna Mures | 817.17 mi (1,315.11 km) |
| Birkerod to Odobesti | 940.74 mi (1,513.98 km) |
| Birkerod to Odorheiu Secuiesc | 860.16 mi (1,384.30 km) |
| Birkerod to Oltenita | 1,024.09 mi (1,648.11 km) |
| Birkerod to Onesti | 905.08 mi (1,456.59 km) |
| Birkerod to Oradea | 728.84 mi (1,172.96 km) |
| Birkerod to Orastie | 832.46 mi (1,339.71 km) |
| Birkerod to Oravita | 847.95 mi (1,364.64 km) |
| Birkerod to Orsova | 882.62 mi (1,420.43 km) |
| Birkerod to Otelu Rosu | 832.75 mi (1,340.18 km) |
| Birkerod to Otopeni | 982.02 mi (1,580.41 km) |
| Birkerod to Ovidiu | 1,067.25 mi (1,717.57 km) |
