| Constanta to Marghita | 374.78 mi (603.15 km) |
| Constanta to Marginea | 285.72 mi (459.83 km) |
| Constanta to Matca | 128.11 mi (206.18 km) |
| Constanta to Medgidia | 19.30 mi (31.07 km) |
| Constanta to Media | 249.60 mi (401.69 km) |
| Constanta to Miercurea-Ciuc | 204.70 mi (329.44 km) |
| Constanta to Mioveni | 189.79 mi (305.43 km) |
| Constanta to Mizil | 122.30 mi (196.82 km) |
| Constanta to Moinesti | 188.25 mi (302.96 km) |
| Constanta to Moisei | 311.17 mi (500.77 km) |
| Constanta to Moldova Noua | 345.79 mi (556.50 km) |
| Constanta to Moreni | 157.47 mi (253.43 km) |
| Constanta to Motru | 282.51 mi (454.66 km) |
| Constanta to Murfatlar | 11.16 mi (17.96 km) |
| Constanta to Nasaud | 296.44 mi (477.08 km) |
