| Harpenden to Maisons-Alfort | 241.74 mi (389.04 km) |
| Harpenden to Maisons-Laffitte | 226.80 mi (364.99 km) |
| Harpenden to Maizieres-les-Metz | 337.89 mi (543.78 km) |
| Harpenden to Malakoff | 237.91 mi (382.88 km) |
| Harpenden to Mandelieu-la-Napoule | 663.77 mi (1,068.23 km) |
| Harpenden to Manosque | 620.18 mi (998.09 km) |
| Harpenden to Mantes-la-Jolie | 215.50 mi (346.82 km) |
| Harpenden to Mantes-la-Ville | 216.40 mi (348.26 km) |
| Harpenden to Marck | 116.04 mi (186.76 km) |
| Harpenden to Marcq-en-Baroeul | 168.90 mi (271.82 km) |
| Harpenden to Margny-les-Compiegne | 215.94 mi (347.52 km) |
| Harpenden to Marguerittes | 592.78 mi (953.98 km) |
| Harpenden to Marignane | 635.30 mi (1,022.42 km) |
| Harpenden to Marly | 343.51 mi (552.83 km) |
| Harpenden to Marly | 197.19 mi (317.35 km) |
