| Potters Bar to Miranda de Ebro | 635.98 mi (1,023.51 km) |
| Potters Bar to Mislata | 844.60 mi (1,359.25 km) |
| Potters Bar to Moana | 764.44 mi (1,230.25 km) |
| Potters Bar to Moguer | 1,048.08 mi (1,686.72 km) |
| Potters Bar to Molina de Segura | 943.98 mi (1,519.18 km) |
| Potters Bar to Molins de Rey | 718.11 mi (1,155.69 km) |
| Potters Bar to Mollerusa | 697.37 mi (1,122.31 km) |
| Potters Bar to Mollet | 711.18 mi (1,144.53 km) |
| Potters Bar to Moncada | 714.35 mi (1,149.64 km) |
| Potters Bar to Moncada | 839.71 mi (1,351.38 km) |
| Potters Bar to Monforte de Lemos | 721.21 mi (1,160.67 km) |
| Potters Bar to Monforte del Cid | 920.62 mi (1,481.60 km) |
| Potters Bar to Mongat | 716.41 mi (1,152.94 km) |
| Potters Bar to Monovar | 916.80 mi (1,475.45 km) |
| Potters Bar to Monserrat | 852.88 mi (1,372.58 km) |
