| Mersch to Navodari | 1,119.42 mi (1,801.54 km) |
| Mersch to Negresti-Oas | 797.07 mi (1,282.76 km) |
| Mersch to Nehoiu | 986.43 mi (1,587.51 km) |
| Mersch to Ocna Mures | 849.92 mi (1,367.81 km) |
| Mersch to Odobesti | 1,008.26 mi (1,622.64 km) |
| Mersch to Odorheiu Secuiesc | 915.58 mi (1,473.48 km) |
| Mersch to Oltenita | 1,041.00 mi (1,675.33 km) |
| Mersch to Onesti | 982.03 mi (1,580.42 km) |
| Mersch to Oradea | 747.26 mi (1,202.59 km) |
| Mersch to Orastie | 835.92 mi (1,345.29 km) |
| Mersch to Oravita | 796.32 mi (1,281.55 km) |
| Mersch to Orsova | 837.34 mi (1,347.57 km) |
| Mersch to Otelu Rosu | 809.20 mi (1,302.28 km) |
| Mersch to Otopeni | 1,001.05 mi (1,611.04 km) |
| Mersch to Ovidiu | 1,118.72 mi (1,800.41 km) |
