| Clay to Miranda de Ebro | 4,399.44 mi (7,080.22 km) |
| Clay to Mislata | 4,609.46 mi (7,418.20 km) |
| Clay to Moana | 4,133.21 mi (6,651.75 km) |
| Clay to Moguer | 4,354.75 mi (7,008.30 km) |
| Clay to Molina de Segura | 4,612.78 mi (7,423.55 km) |
| Clay to Molins de Rey | 4,666.92 mi (7,510.69 km) |
| Clay to Mollerusa | 4,608.17 mi (7,416.13 km) |
| Clay to Mollet | 4,672.33 mi (7,519.39 km) |
| Clay to Moncada | 4,672.75 mi (7,520.06 km) |
| Clay to Moncada | 4,608.33 mi (7,416.40 km) |
| Clay to Monforte de Lemos | 4,186.82 mi (6,738.04 km) |
| Clay to Monforte del Cid | 4,626.75 mi (7,446.04 km) |
| Clay to Mongat | 4,677.59 mi (7,527.86 km) |
| Clay to Monovar | 4,619.77 mi (7,434.79 km) |
| Clay to Monserrat | 4,603.88 mi (7,409.23 km) |
