| Hemel Hempstead to Mitcham | 27.86 mi (44.84 km) |
| Hemel Hempstead to Mold | 148.69 mi (239.29 km) |
| Hemel Hempstead to Molesey | 24.72 mi (39.78 km) |
| Hemel Hempstead to Monkseaton | 230.97 mi (371.70 km) |
| Hemel Hempstead to Monmouth | 96.29 mi (154.96 km) |
| Hemel Hempstead to Montrose | 351.72 mi (566.04 km) |
| Hemel Hempstead to Morden | 26.97 mi (43.40 km) |
| Hemel Hempstead to Morecambe | 188.95 mi (304.08 km) |
| Hemel Hempstead to Moreton | 158.96 mi (255.83 km) |
| Hemel Hempstead to Morley | 145.86 mi (234.74 km) |
| Hemel Hempstead to Morpeth | 241.23 mi (388.22 km) |
| Hemel Hempstead to Morriston | 148.66 mi (239.25 km) |
| Hemel Hempstead to Mosbrough | 114.94 mi (184.97 km) |
| Hemel Hempstead to Mossley | 138.39 mi (222.72 km) |
| Hemel Hempstead to Moston | 141.46 mi (227.66 km) |
