| Tarquinia to Navodari | 858.27 mi (1,381.25 km) |
| Tarquinia to Negresti-Oas | 688.10 mi (1,107.39 km) |
| Tarquinia to Nehoiu | 755.34 mi (1,215.60 km) |
| Tarquinia to Ocna Mures | 662.27 mi (1,065.82 km) |
| Tarquinia to Odobesti | 797.25 mi (1,283.06 km) |
| Tarquinia to Odorheiu Secuiesc | 725.31 mi (1,167.27 km) |
| Tarquinia to Oltenita | 759.46 mi (1,222.24 km) |
| Tarquinia to Onesti | 791.42 mi (1,273.67 km) |
| Tarquinia to Oradea | 599.75 mi (965.21 km) |
| Tarquinia to Orastie | 619.63 mi (997.20 km) |
| Tarquinia to Oravita | 532.14 mi (856.39 km) |
| Tarquinia to Orsova | 559.65 mi (900.67 km) |
| Tarquinia to Otelu Rosu | 573.44 mi (922.86 km) |
| Tarquinia to Otopeni | 734.92 mi (1,182.74 km) |
| Tarquinia to Ovidiu | 855.41 mi (1,376.66 km) |
