| Horndean to Nasaud | 1,170.04 mi (1,882.99 km) |
| Horndean to Navodari | 1,440.95 mi (2,318.99 km) |
| Horndean to Negresti-Oas | 1,112.81 mi (1,790.89 km) |
| Horndean to Nehoiu | 1,307.64 mi (2,104.44 km) |
| Horndean to Ocna Mures | 1,170.58 mi (1,883.86 km) |
| Horndean to Odobesti | 1,328.00 mi (2,137.21 km) |
| Horndean to Odorheiu Secuiesc | 1,235.30 mi (1,988.03 km) |
| Horndean to Oltenita | 1,363.68 mi (2,194.63 km) |
| Horndean to Onesti | 1,300.66 mi (2,093.21 km) |
| Horndean to Oradea | 1,067.55 mi (1,718.06 km) |
| Horndean to Orastie | 1,158.07 mi (1,863.74 km) |
| Horndean to Oravita | 1,119.28 mi (1,801.30 km) |
| Horndean to Orsova | 1,160.28 mi (1,867.30 km) |
| Horndean to Otelu Rosu | 1,132.02 mi (1,821.82 km) |
| Horndean to Otopeni | 1,323.53 mi (2,130.01 km) |
