| Asker to Navodari | 1,311.31 mi (2,110.34 km) |
| Asker to Negresti-Oas | 977.67 mi (1,573.41 km) |
| Asker to Nehoiu | 1,195.03 mi (1,923.22 km) |
| Asker to Ocna Mures | 1,078.25 mi (1,735.27 km) |
| Asker to Odobesti | 1,187.36 mi (1,910.87 km) |
| Asker to Odorheiu Secuiesc | 1,113.83 mi (1,792.53 km) |
| Asker to Oltenita | 1,280.46 mi (2,060.70 km) |
| Asker to Onesti | 1,150.73 mi (1,851.93 km) |
| Asker to Oradea | 997.05 mi (1,604.59 km) |
| Asker to Orastie | 1,098.87 mi (1,768.46 km) |
| Asker to Oravita | 1,122.94 mi (1,807.20 km) |
| Asker to Orsova | 1,155.67 mi (1,859.87 km) |
| Asker to Otelu Rosu | 1,103.95 mi (1,776.64 km) |
| Asker to Otopeni | 1,239.38 mi (1,994.59 km) |
| Asker to Ovidiu | 1,313.13 mi (2,113.29 km) |
