| Halluin to Navodari | 1,261.91 mi (2,030.85 km) |
| Halluin to Negresti-Oas | 932.80 mi (1,501.20 km) |
| Halluin to Nehoiu | 1,128.47 mi (1,816.09 km) |
| Halluin to Ocna Mures | 991.23 mi (1,595.22 km) |
| Halluin to Odobesti | 1,148.33 mi (1,848.06 km) |
| Halluin to Odorheiu Secuiesc | 1,055.66 mi (1,698.92 km) |
| Halluin to Oltenita | 1,185.76 mi (1,908.30 km) |
| Halluin to Onesti | 1,120.80 mi (1,803.76 km) |
| Halluin to Oradea | 888.12 mi (1,429.30 km) |
| Halluin to Orastie | 979.59 mi (1,576.50 km) |
| Halluin to Oravita | 943.29 mi (1,518.07 km) |
| Halluin to Orsova | 984.33 mi (1,584.13 km) |
| Halluin to Otelu Rosu | 954.55 mi (1,536.20 km) |
| Halluin to Otopeni | 1,145.32 mi (1,843.21 km) |
| Halluin to Ovidiu | 1,261.38 mi (2,029.99 km) |
