| Holyhead to Melzo | 828.15 mi (1,332.78 km) |
| Holyhead to Mendicino | 1,379.80 mi (2,220.58 km) |
| Holyhead to Menfi | 1,372.20 mi (2,208.34 km) |
| Holyhead to Mentana | 1,114.99 mi (1,794.40 km) |
| Holyhead to Merano | 835.38 mi (1,344.42 km) |
| Holyhead to Merate | 818.88 mi (1,317.86 km) |
| Holyhead to Mercato San Severino | 1,250.63 mi (2,012.69 km) |
| Holyhead to Mercogliano | 1,242.41 mi (1,999.47 km) |
| Holyhead to Mesagne | 1,366.37 mi (2,198.95 km) |
| Holyhead to Messina | 1,417.73 mi (2,281.61 km) |
| Holyhead to Mestre | 927.55 mi (1,492.74 km) |
| Holyhead to Mestrino | 912.46 mi (1,468.47 km) |
| Holyhead to Milan | 822.16 mi (1,323.13 km) |
| Holyhead to Milazzo | 1,406.33 mi (2,263.26 km) |
| Holyhead to Minerbio | 941.94 mi (1,515.91 km) |
