| Halstead to Nasaud | 1,105.91 mi (1,779.79 km) |
| Halstead to Navodari | 1,382.48 mi (2,224.89 km) |
| Halstead to Negresti-Oas | 1,047.32 mi (1,685.50 km) |
| Halstead to Nehoiu | 1,248.80 mi (2,009.75 km) |
| Halstead to Ocna Mures | 1,111.15 mi (1,788.22 km) |
| Halstead to Odobesti | 1,266.47 mi (2,038.18 km) |
| Halstead to Odorheiu Secuiesc | 1,174.07 mi (1,889.49 km) |
| Halstead to Oltenita | 1,309.18 mi (2,106.92 km) |
| Halstead to Onesti | 1,237.64 mi (1,991.79 km) |
| Halstead to Oradea | 1,007.95 mi (1,622.14 km) |
| Halstead to Orastie | 1,102.14 mi (1,773.72 km) |
| Halstead to Oravita | 1,069.96 mi (1,721.94 km) |
| Halstead to Orsova | 1,110.98 mi (1,787.95 km) |
| Halstead to Otelu Rosu | 1,079.14 mi (1,736.71 km) |
| Halstead to Otopeni | 1,268.20 mi (2,040.97 km) |
