| Caernarfon to Marly-le-Roi | 404.34 mi (650.72 km) |
| Caernarfon to Marmande | 629.83 mi (1,013.62 km) |
| Caernarfon to Maromme | 341.16 mi (549.05 km) |
| Caernarfon to Marquette-les-Lille | 355.81 mi (572.62 km) |
| Caernarfon to Marseille | 810.53 mi (1,304.42 km) |
| Caernarfon to Martigues | 796.03 mi (1,281.08 km) |
| Caernarfon to Massy | 416.72 mi (670.64 km) |
| Caernarfon to Maubeuge | 404.22 mi (650.54 km) |
| Caernarfon to Mauguio | 758.65 mi (1,220.93 km) |
| Caernarfon to Mauleon | 456.96 mi (735.40 km) |
| Caernarfon to Maurepas | 405.49 mi (652.57 km) |
| Caernarfon to Maxeville | 546.97 mi (880.26 km) |
| Caernarfon to Mayenne | 370.38 mi (596.07 km) |
| Caernarfon to Mazamet | 732.44 mi (1,178.74 km) |
| Caernarfon to Meaux | 423.97 mi (682.32 km) |
