| Echternach to Navodari | 1,106.18 mi (1,780.22 km) |
| Echternach to Negresti-Oas | 782.97 mi (1,260.06 km) |
| Echternach to Nehoiu | 973.10 mi (1,566.05 km) |
| Echternach to Ocna Mures | 836.45 mi (1,346.14 km) |
| Echternach to Odobesti | 994.65 mi (1,600.73 km) |
| Echternach to Odorheiu Secuiesc | 901.96 mi (1,451.56 km) |
| Echternach to Oltenita | 1,028.18 mi (1,654.70 km) |
| Echternach to Onesti | 968.26 mi (1,558.26 km) |
| Echternach to Oradea | 733.71 mi (1,180.79 km) |
| Echternach to Orastie | 822.85 mi (1,324.25 km) |
| Echternach to Oravita | 784.08 mi (1,261.85 km) |
| Echternach to Orsova | 825.11 mi (1,327.88 km) |
| Echternach to Otelu Rosu | 796.49 mi (1,281.82 km) |
| Echternach to Otopeni | 988.12 mi (1,590.23 km) |
| Echternach to Ovidiu | 1,105.51 mi (1,779.14 km) |
