| Merzig to Navodari | 1,092.83 mi (1,758.73 km) |
| Merzig to Negresti-Oas | 773.14 mi (1,244.25 km) |
| Merzig to Nehoiu | 960.07 mi (1,545.08 km) |
| Merzig to Ocna Mures | 823.91 mi (1,325.96 km) |
| Merzig to Odobesti | 982.61 mi (1,581.36 km) |
| Merzig to Odorheiu Secuiesc | 889.98 mi (1,432.29 km) |
| Merzig to Oltenita | 1,013.53 mi (1,631.12 km) |
| Merzig to Onesti | 956.86 mi (1,539.91 km) |
| Merzig to Oradea | 721.52 mi (1,161.17 km) |
| Merzig to Orastie | 809.00 mi (1,301.96 km) |
| Merzig to Oravita | 767.93 mi (1,235.86 km) |
| Merzig to Orsova | 808.92 mi (1,301.83 km) |
| Merzig to Otelu Rosu | 781.57 mi (1,257.81 km) |
| Merzig to Otopeni | 973.80 mi (1,567.19 km) |
| Merzig to Ovidiu | 1,092.06 mi (1,757.51 km) |
