| Holyhead to Masanasa | 980.99 mi (1,578.75 km) |
| Holyhead to Masquefa | 868.72 mi (1,398.08 km) |
| Holyhead to Matadepera | 865.58 mi (1,393.02 km) |
| Holyhead to Mazarron | 1,097.05 mi (1,765.54 km) |
| Holyhead to Meco | 883.41 mi (1,421.71 km) |
| Holyhead to Medina del Campo | 829.85 mi (1,335.51 km) |
| Holyhead to Medina Sidonia | 1,165.34 mi (1,875.43 km) |
| Holyhead to Mejorada del Campo | 894.06 mi (1,438.85 km) |
| Holyhead to Meliana | 973.40 mi (1,566.53 km) |
| Holyhead to Mengibar | 1,060.67 mi (1,706.98 km) |
| Holyhead to Merida | 998.82 mi (1,607.44 km) |
| Holyhead to Miajadas | 980.64 mi (1,578.18 km) |
| Holyhead to Mieres | 696.92 mi (1,121.58 km) |
| Holyhead to Miguelturra | 991.48 mi (1,595.64 km) |
| Holyhead to Mijas | 1,154.48 mi (1,857.96 km) |
