| Holyhead to Miranda de Ebro | 738.30 mi (1,188.18 km) |
| Holyhead to Mislata | 976.30 mi (1,571.20 km) |
| Holyhead to Moana | 785.06 mi (1,263.44 km) |
| Holyhead to Moguer | 1,112.90 mi (1,791.04 km) |
| Holyhead to Molina de Segura | 1,066.50 mi (1,716.36 km) |
| Holyhead to Molins de Rey | 877.87 mi (1,412.80 km) |
| Holyhead to Mollerusa | 846.50 mi (1,362.31 km) |
| Holyhead to Mollet | 873.14 mi (1,405.18 km) |
| Holyhead to Moncada | 875.95 mi (1,409.70 km) |
| Holyhead to Moncada | 971.69 mi (1,563.79 km) |
| Holyhead to Monforte de Lemos | 757.39 mi (1,218.90 km) |
| Holyhead to Monforte del Cid | 1,048.11 mi (1,686.77 km) |
| Holyhead to Mongat | 878.79 mi (1,414.27 km) |
| Holyhead to Monovar | 1,043.27 mi (1,678.99 km) |
| Holyhead to Monserrat | 982.54 mi (1,581.24 km) |
