| Herk-de-Stad to Navodari | 1,177.19 mi (1,894.51 km) |
| Herk-de-Stad to Negresti-Oas | 845.38 mi (1,360.51 km) |
| Herk-de-Stad to Nehoiu | 1,043.59 mi (1,679.49 km) |
| Herk-de-Stad to Ocna Mures | 906.08 mi (1,458.19 km) |
| Herk-de-Stad to Odobesti | 1,062.38 mi (1,709.74 km) |
| Herk-de-Stad to Odorheiu Secuiesc | 969.80 mi (1,560.74 km) |
| Herk-de-Stad to Oltenita | 1,102.81 mi (1,774.81 km) |
| Herk-de-Stad to Onesti | 1,034.30 mi (1,664.54 km) |
| Herk-de-Stad to Oradea | 802.88 mi (1,292.10 km) |
| Herk-de-Stad to Orastie | 895.99 mi (1,441.96 km) |
| Herk-de-Stad to Oravita | 863.10 mi (1,389.03 km) |
| Herk-de-Stad to Orsova | 904.12 mi (1,455.04 km) |
| Herk-de-Stad to Otelu Rosu | 872.45 mi (1,404.08 km) |
| Herk-de-Stad to Otopeni | 1,061.99 mi (1,709.10 km) |
| Herk-de-Stad to Ovidiu | 1,176.77 mi (1,893.83 km) |
