| Potters Bar to Massarosa | 727.37 mi (1,170.59 km) |
| Potters Bar to Matelica | 845.98 mi (1,361.47 km) |
| Potters Bar to Matera | 1,102.10 mi (1,773.66 km) |
| Potters Bar to Matino | 1,188.06 mi (1,912.00 km) |
| Potters Bar to Mazzarino | 1,216.73 mi (1,958.13 km) |
| Potters Bar to Meda | 595.42 mi (958.23 km) |
| Potters Bar to Medesano | 674.02 mi (1,084.74 km) |
| Potters Bar to Medicina | 737.18 mi (1,186.38 km) |
| Potters Bar to Meldola | 768.92 mi (1,237.45 km) |
| Potters Bar to Melegnano | 616.35 mi (991.92 km) |
| Potters Bar to Melendugno | 1,183.01 mi (1,903.87 km) |
| Potters Bar to Melfi | 1,052.39 mi (1,693.66 km) |
| Potters Bar to Melilli | 1,249.74 mi (2,011.26 km) |
| Potters Bar to Melito di Napoli | 1,010.46 mi (1,626.19 km) |
| Potters Bar to Melito di Porto Salvo | 1,227.01 mi (1,974.68 km) |
