| Caerphilly to Lubbeek | 351.82 mi (566.19 km) |
| Caerphilly to Lummen | 365.92 mi (588.89 km) |
| Caerphilly to Maaseik | 389.76 mi (627.25 km) |
| Caerphilly to Machelen | 334.13 mi (537.72 km) |
| Caerphilly to Maldegem | 287.87 mi (463.27 km) |
| Caerphilly to Malmedy | 409.21 mi (658.56 km) |
| Caerphilly to Manage | 332.02 mi (534.34 km) |
| Caerphilly to Marche-en-Famenne | 384.09 mi (618.13 km) |
| Caerphilly to Mariakerke | 299.59 mi (482.14 km) |
| Caerphilly to Mechelen | 334.57 mi (538.43 km) |
| Caerphilly to Mechelen-aan-de-Maas | 387.31 mi (623.32 km) |
| Caerphilly to Meerhout | 359.30 mi (578.24 km) |
| Caerphilly to Meise | 329.40 mi (530.12 km) |
| Caerphilly to Melle | 305.75 mi (492.05 km) |
| Caerphilly to Melsele | 324.07 mi (521.55 km) |
