| Constanta to Masquefa | 1,365.10 mi (2,196.91 km) |
| Constanta to Matadepera | 1,352.68 mi (2,176.92 km) |
| Constanta to Mazarron | 1,618.77 mi (2,605.16 km) |
| Constanta to Meco | 1,640.08 mi (2,639.46 km) |
| Constanta to Medina del Campo | 1,702.21 mi (2,739.45 km) |
| Constanta to Medina Sidonia | 1,880.85 mi (3,026.93 km) |
| Constanta to Mejorada del Campo | 1,646.68 mi (2,650.07 km) |
| Constanta to Meliana | 1,517.40 mi (2,442.02 km) |
| Constanta to Mengibar | 1,731.16 mi (2,786.03 km) |
| Constanta to Merida | 1,830.33 mi (2,945.63 km) |
| Constanta to Miajadas | 1,810.48 mi (2,913.68 km) |
| Constanta to Mieres | 1,707.17 mi (2,747.42 km) |
| Constanta to Miguelturra | 1,710.43 mi (2,752.67 km) |
| Constanta to Mijas | 1,813.26 mi (2,918.15 km) |
| Constanta to Miranda de Ebro | 1,577.60 mi (2,538.90 km) |
