| Sieradz to Marco de Canavezes | 1,458.06 mi (2,346.52 km) |
| Sieradz to Marinha Grande | 1,553.13 mi (2,499.52 km) |
| Sieradz to Massama | 1,612.48 mi (2,595.03 km) |
| Sieradz to Matosinhos | 1,480.43 mi (2,382.52 km) |
| Sieradz to Mealhada | 1,505.27 mi (2,422.50 km) |
| Sieradz to Melgaco | 1,423.39 mi (2,290.73 km) |
| Sieradz to Melres | 1,473.25 mi (2,370.96 km) |
| Sieradz to Mira | 1,514.47 mi (2,437.31 km) |
| Sieradz to Miranda do Corvo | 1,513.27 mi (2,435.37 km) |
| Sieradz to Mirandela | 1,405.80 mi (2,262.41 km) |
| Sieradz to Mogadouro | 1,393.65 mi (2,242.86 km) |
| Sieradz to Moimenta da Beira | 1,445.23 mi (2,325.86 km) |
| Sieradz to Moita | 1,605.94 mi (2,584.51 km) |
| Sieradz to Moncao | 1,433.95 mi (2,307.72 km) |
| Sieradz to Montalegre | 1,416.18 mi (2,279.12 km) |
