| Caerfyrddin to Menen | 329.22 mi (529.83 km) |
| Caerfyrddin to Merchtem | 373.30 mi (600.76 km) |
| Caerfyrddin to Merelbeke | 352.29 mi (566.95 km) |
| Caerfyrddin to Merksem | 378.41 mi (608.98 km) |
| Caerfyrddin to Merksplas | 395.18 mi (635.98 km) |
| Caerfyrddin to Mettet | 403.34 mi (649.12 km) |
| Caerfyrddin to Meulebeke | 333.48 mi (536.68 km) |
| Caerfyrddin to Middelkerke | 310.12 mi (499.08 km) |
| Caerfyrddin to Mol | 407.90 mi (656.46 km) |
| Caerfyrddin to Mons | 370.94 mi (596.97 km) |
| Caerfyrddin to Montignies-le-Tilleul | 390.50 mi (628.44 km) |
| Caerfyrddin to Moorslede | 325.02 mi (523.07 km) |
| Caerfyrddin to Moortebeek | 379.54 mi (610.82 km) |
| Caerfyrddin to Morlanwelz-Mariemont | 382.78 mi (616.03 km) |
| Caerfyrddin to Mortsel | 380.42 mi (612.22 km) |
