| Mettlach to Navodari | 1,094.22 mi (1,760.97 km) |
| Mettlach to Negresti-Oas | 774.11 mi (1,245.81 km) |
| Mettlach to Nehoiu | 961.42 mi (1,547.25 km) |
| Mettlach to Ocna Mures | 825.20 mi (1,328.03 km) |
| Mettlach to Odobesti | 983.84 mi (1,583.34 km) |
| Mettlach to Odorheiu Secuiesc | 891.21 mi (1,434.26 km) |
| Mettlach to Oltenita | 1,015.07 mi (1,633.60 km) |
| Mettlach to Onesti | 958.02 mi (1,541.78 km) |
| Mettlach to Oradea | 722.76 mi (1,163.16 km) |
| Mettlach to Orastie | 810.44 mi (1,304.28 km) |
| Mettlach to Oravita | 769.64 mi (1,238.62 km) |
| Mettlach to Orsova | 810.64 mi (1,304.59 km) |
| Mettlach to Otelu Rosu | 783.13 mi (1,260.33 km) |
| Mettlach to Otopeni | 975.31 mi (1,569.60 km) |
| Mettlach to Ovidiu | 1,093.47 mi (1,759.76 km) |
