| Constanta to Montilla | 1,783.21 mi (2,869.80 km) |
| Constanta to Montmelo | 1,342.46 mi (2,160.48 km) |
| Constanta to Montornes del Valles | 1,341.82 mi (2,159.46 km) |
| Constanta to Montoro | 1,758.20 mi (2,829.56 km) |
| Constanta to Monzon | 1,437.58 mi (2,313.56 km) |
| Constanta to Mora | 1,683.30 mi (2,709.01 km) |
| Constanta to Moralzarzal | 1,669.16 mi (2,686.25 km) |
| Constanta to Moron de la Frontera | 1,837.53 mi (2,957.22 km) |
| Constanta to Mostoles | 1,671.98 mi (2,690.79 km) |
| Constanta to Motril | 1,753.45 mi (2,821.91 km) |
| Constanta to Muchamiel | 1,552.14 mi (2,497.92 km) |
| Constanta to Mula | 1,614.40 mi (2,598.12 km) |
| Constanta to Munguia | 1,562.30 mi (2,514.28 km) |
| Constanta to Murcia | 1,598.23 mi (2,572.10 km) |
| Constanta to Muro del Alcoy | 1,541.48 mi (2,480.77 km) |
