| Halen to Navodari | 1,179.55 mi (1,898.30 km) |
| Halen to Negresti-Oas | 847.73 mi (1,364.29 km) |
| Halen to Nehoiu | 1,045.94 mi (1,683.28 km) |
| Halen to Ocna Mures | 908.43 mi (1,461.98 km) |
| Halen to Odobesti | 1,064.74 mi (1,713.53 km) |
| Halen to Odorheiu Secuiesc | 972.16 mi (1,564.53 km) |
| Halen to Oltenita | 1,105.16 mi (1,778.59 km) |
| Halen to Onesti | 1,036.65 mi (1,668.33 km) |
| Halen to Oradea | 805.23 mi (1,295.90 km) |
| Halen to Orastie | 898.34 mi (1,445.74 km) |
| Halen to Oravita | 865.43 mi (1,392.78 km) |
| Halen to Orsova | 906.44 mi (1,458.78 km) |
| Halen to Otelu Rosu | 874.79 mi (1,407.85 km) |
| Halen to Otopeni | 1,064.34 mi (1,712.89 km) |
| Halen to Ovidiu | 1,179.13 mi (1,897.62 km) |
