| Middlesbrough to Masanasa | 1,048.76 mi (1,687.81 km) |
| Middlesbrough to Masquefa | 913.96 mi (1,470.87 km) |
| Middlesbrough to Matadepera | 908.64 mi (1,462.31 km) |
| Middlesbrough to Mazarron | 1,173.10 mi (1,887.92 km) |
| Middlesbrough to Meco | 973.66 mi (1,566.95 km) |
| Middlesbrough to Medina del Campo | 932.69 mi (1,501.02 km) |
| Middlesbrough to Medina Sidonia | 1,270.93 mi (2,045.37 km) |
| Middlesbrough to Mejorada del Campo | 984.75 mi (1,584.81 km) |
| Middlesbrough to Meliana | 1,040.63 mi (1,674.74 km) |
| Middlesbrough to Mengibar | 1,153.89 mi (1,857.01 km) |
| Middlesbrough to Merida | 1,109.00 mi (1,784.76 km) |
| Middlesbrough to Miajadas | 1,089.40 mi (1,753.21 km) |
| Middlesbrough to Mieres | 808.82 mi (1,301.68 km) |
| Middlesbrough to Miguelturra | 1,085.96 mi (1,747.69 km) |
| Middlesbrough to Mijas | 1,252.52 mi (2,015.74 km) |
