| Caerphilly to Mechernich | 433.21 mi (697.18 km) |
| Caerphilly to Meckenbeuren | 630.39 mi (1,014.51 km) |
| Caerphilly to Meckenheim | 448.40 mi (721.63 km) |
| Caerphilly to Meerane | 679.24 mi (1,093.13 km) |
| Caerphilly to Meerbusch | 426.10 mi (685.74 km) |
| Caerphilly to Meine | 586.95 mi (944.60 km) |
| Caerphilly to Meinerzhagen | 468.94 mi (754.69 km) |
| Caerphilly to Meiningen | 595.40 mi (958.21 km) |
| Caerphilly to Meissen | 719.35 mi (1,157.68 km) |
| Caerphilly to Meitingen | 656.63 mi (1,056.75 km) |
| Caerphilly to Melle | 494.17 mi (795.29 km) |
| Caerphilly to Melsungen | 551.06 mi (886.85 km) |
| Caerphilly to Memmelsdorf | 628.73 mi (1,011.85 km) |
| Caerphilly to Memmingen | 645.99 mi (1,039.62 km) |
| Caerphilly to Mendig | 463.82 mi (746.45 km) |
