| Caerphilly to Montigny-les-Metz | 446.92 mi (719.24 km) |
| Caerphilly to Montivilliers | 205.04 mi (329.98 km) |
| Caerphilly to Montlouis-sur-Loire | 341.60 mi (549.74 km) |
| Caerphilly to Montlucon | 447.67 mi (720.45 km) |
| Caerphilly to Montmagny | 304.39 mi (489.88 km) |
| Caerphilly to Montmorency | 302.85 mi (487.39 km) |
| Caerphilly to Montpellier | 641.37 mi (1,032.18 km) |
| Caerphilly to Montreuil | 312.72 mi (503.27 km) |
| Caerphilly to Montrouge | 310.38 mi (499.51 km) |
| Caerphilly to Morangis | 315.80 mi (508.22 km) |
| Caerphilly to Morieres-les-Avignon | 647.77 mi (1,042.49 km) |
| Caerphilly to Morlaix | 209.07 mi (336.46 km) |
| Caerphilly to Morsang-sur-Orge | 318.22 mi (512.12 km) |
| Caerphilly to Mouans-Sartoux | 725.07 mi (1,166.89 km) |
| Caerphilly to Mougins | 726.86 mi (1,169.77 km) |
