| Vianden to Navodari | 1,117.22 mi (1,797.99 km) |
| Vianden to Negresti-Oas | 793.01 mi (1,276.22 km) |
| Vianden to Nehoiu | 984.06 mi (1,583.69 km) |
| Vianden to Ocna Mures | 847.29 mi (1,363.59 km) |
| Vianden to Odobesti | 1,005.33 mi (1,617.92 km) |
| Vianden to Odorheiu Secuiesc | 912.63 mi (1,468.73 km) |
| Vianden to Oltenita | 1,039.57 mi (1,673.03 km) |
| Vianden to Onesti | 978.75 mi (1,575.15 km) |
| Vianden to Oradea | 744.47 mi (1,198.11 km) |
| Vianden to Orastie | 834.05 mi (1,342.28 km) |
| Vianden to Oravita | 795.85 mi (1,280.79 km) |
| Vianden to Orsova | 836.88 mi (1,346.83 km) |
| Vianden to Otelu Rosu | 807.96 mi (1,300.29 km) |
| Vianden to Otopeni | 999.43 mi (1,608.43 km) |
| Vianden to Ovidiu | 1,116.57 mi (1,796.95 km) |
