| Castanet-Tolosan to Menen | 508.72 mi (818.70 km) |
| Castanet-Tolosan to Merchtem | 530.47 mi (853.71 km) |
| Castanet-Tolosan to Merelbeke | 527.73 mi (849.29 km) |
| Castanet-Tolosan to Merksem | 551.25 mi (887.15 km) |
| Castanet-Tolosan to Merksplas | 564.68 mi (908.76 km) |
| Castanet-Tolosan to Mettet | 493.03 mi (793.46 km) |
| Castanet-Tolosan to Meulebeke | 520.41 mi (837.53 km) |
| Castanet-Tolosan to Middelkerke | 533.46 mi (858.51 km) |
| Castanet-Tolosan to Mol | 556.03 mi (894.84 km) |
| Castanet-Tolosan to Mons | 492.79 mi (793.07 km) |
| Castanet-Tolosan to Montignies-le-Tilleul | 493.54 mi (794.27 km) |
| Castanet-Tolosan to Moorslede | 514.80 mi (828.49 km) |
| Castanet-Tolosan to Moortebeek | 524.23 mi (843.66 km) |
| Castanet-Tolosan to Morlanwelz-Mariemont | 496.07 mi (798.35 km) |
| Castanet-Tolosan to Mortsel | 546.48 mi (879.48 km) |
