| Hwlffordd to Miranda de Ebro | 637.04 mi (1,025.21 km) |
| Hwlffordd to Mislata | 879.09 mi (1,414.76 km) |
| Hwlffordd to Moana | 680.96 mi (1,095.90 km) |
| Hwlffordd to Moguer | 1,007.72 mi (1,621.77 km) |
| Hwlffordd to Molina de Segura | 966.98 mi (1,556.21 km) |
| Hwlffordd to Molins de Rey | 789.64 mi (1,270.80 km) |
| Hwlffordd to Mollerusa | 754.91 mi (1,214.91 km) |
| Hwlffordd to Mollet | 785.78 mi (1,264.58 km) |
| Hwlffordd to Moncada | 788.43 mi (1,268.85 km) |
| Hwlffordd to Moncada | 874.58 mi (1,407.49 km) |
| Hwlffordd to Monforte de Lemos | 652.38 mi (1,049.91 km) |
| Hwlffordd to Monforte del Cid | 949.65 mi (1,528.31 km) |
| Hwlffordd to Mongat | 791.54 mi (1,273.86 km) |
| Hwlffordd to Monovar | 944.62 mi (1,520.23 km) |
| Hwlffordd to Monserrat | 884.84 mi (1,424.01 km) |
