| Siena to Menen | 644.33 mi (1,036.95 km) |
| Siena to Merchtem | 624.28 mi (1,004.67 km) |
| Siena to Merelbeke | 638.44 mi (1,027.48 km) |
| Siena to Merksem | 635.04 mi (1,021.99 km) |
| Siena to Merksplas | 632.54 mi (1,017.98 km) |
| Siena to Mettet | 577.03 mi (928.64 km) |
| Siena to Meulebeke | 648.01 mi (1,042.88 km) |
| Siena to Middelkerke | 673.42 mi (1,083.76 km) |
| Siena to Mol | 616.13 mi (991.56 km) |
| Siena to Mons | 602.93 mi (970.32 km) |
| Siena to Montignies-le-Tilleul | 587.71 mi (945.83 km) |
| Siena to Moorslede | 651.02 mi (1,047.71 km) |
| Siena to Moortebeek | 615.30 mi (990.24 km) |
| Siena to Morlanwelz-Mariemont | 595.35 mi (958.13 km) |
| Siena to Mortsel | 630.04 mi (1,013.95 km) |
