| Harpenden to Marly-le-Roi | 230.62 mi (371.15 km) |
| Harpenden to Marmande | 506.15 mi (814.57 km) |
| Harpenden to Maromme | 172.54 mi (277.68 km) |
| Harpenden to Marquette-les-Lille | 167.55 mi (269.65 km) |
| Harpenden to Marseille | 645.90 mi (1,039.48 km) |
| Harpenden to Martigues | 632.88 mi (1,018.53 km) |
| Harpenden to Massy | 242.66 mi (390.53 km) |
| Harpenden to Maubeuge | 215.89 mi (347.43 km) |
| Harpenden to Mauguio | 601.52 mi (968.05 km) |
| Harpenden to Mauleon | 338.66 mi (545.02 km) |
| Harpenden to Maurepas | 234.14 mi (376.82 km) |
| Harpenden to Maxeville | 358.76 mi (577.37 km) |
| Harpenden to Mayenne | 243.10 mi (391.23 km) |
| Harpenden to Mazamet | 588.97 mi (947.85 km) |
| Harpenden to Meaux | 243.57 mi (391.99 km) |
