| Roudnice nad Labem to Navodari | 790.96 mi (1,272.93 km) |
| Roudnice nad Labem to Negresti-Oas | 449.79 mi (723.87 km) |
| Roudnice nad Labem to Nehoiu | 657.71 mi (1,058.48 km) |
| Roudnice nad Labem to Ocna Mures | 520.48 mi (837.64 km) |
| Roudnice nad Labem to Odobesti | 671.61 mi (1,080.85 km) |
| Roudnice nad Labem to Odorheiu Secuiesc | 580.09 mi (933.57 km) |
| Roudnice nad Labem to Oltenita | 725.49 mi (1,167.56 km) |
| Roudnice nad Labem to Onesti | 641.40 mi (1,032.24 km) |
| Roudnice nad Labem to Oradea | 418.52 mi (673.55 km) |
| Roudnice nad Labem to Orastie | 518.82 mi (834.95 km) |
| Roudnice nad Labem to Oravita | 506.91 mi (815.79 km) |
| Roudnice nad Labem to Orsova | 546.07 mi (878.81 km) |
| Roudnice nad Labem to Otelu Rosu | 504.47 mi (811.86 km) |
| Roudnice nad Labem to Otopeni | 683.34 mi (1,099.72 km) |
| Roudnice nad Labem to Ovidiu | 791.01 mi (1,273.01 km) |
