| Herent to Navodari | 1,197.72 mi (1,927.54 km) |
| Herent to Negresti-Oas | 866.57 mi (1,394.61 km) |
| Herent to Nehoiu | 1,064.14 mi (1,712.57 km) |
| Herent to Ocna Mures | 926.69 mi (1,491.37 km) |
| Herent to Odobesti | 1,083.21 mi (1,743.26 km) |
| Herent to Odorheiu Secuiesc | 990.60 mi (1,594.22 km) |
| Herent to Oltenita | 1,122.89 mi (1,807.12 km) |
| Herent to Onesti | 1,055.27 mi (1,698.29 km) |
| Herent to Oradea | 823.51 mi (1,325.31 km) |
| Herent to Orastie | 916.21 mi (1,474.50 km) |
| Herent to Oravita | 882.45 mi (1,420.17 km) |
| Herent to Orsova | 923.48 mi (1,486.20 km) |
| Herent to Otelu Rosu | 892.29 mi (1,436.00 km) |
| Herent to Otopeni | 1,082.16 mi (1,741.56 km) |
| Herent to Ovidiu | 1,197.27 mi (1,926.82 km) |
