| Holbaek to Navodari | 1,081.65 mi (1,740.74 km) |
| Holbaek to Negresti-Oas | 735.63 mi (1,183.87 km) |
| Holbaek to Nehoiu | 956.75 mi (1,539.74 km) |
| Holbaek to Ocna Mures | 830.06 mi (1,335.86 km) |
| Holbaek to Odobesti | 956.46 mi (1,539.27 km) |
| Holbaek to Odorheiu Secuiesc | 874.66 mi (1,407.63 km) |
| Holbaek to Oltenita | 1,037.66 mi (1,669.96 km) |
| Holbaek to Onesti | 921.05 mi (1,482.29 km) |
| Holbaek to Oradea | 739.97 mi (1,190.87 km) |
| Holbaek to Orastie | 843.87 mi (1,358.07 km) |
| Holbaek to Oravita | 856.42 mi (1,378.28 km) |
| Holbaek to Orsova | 891.77 mi (1,435.16 km) |
| Holbaek to Otelu Rosu | 842.65 mi (1,356.12 km) |
| Holbaek to Otopeni | 995.45 mi (1,602.02 km) |
| Holbaek to Ovidiu | 1,082.86 mi (1,742.70 km) |
