| Chelmsford to Mangualde | 862.68 mi (1,388.35 km) |
| Chelmsford to Marco de Canavezes | 835.18 mi (1,344.09 km) |
| Chelmsford to Marinha Grande | 942.25 mi (1,516.40 km) |
| Chelmsford to Massama | 1,012.17 mi (1,628.92 km) |
| Chelmsford to Matosinhos | 848.17 mi (1,365.00 km) |
| Chelmsford to Mealhada | 891.75 mi (1,435.14 km) |
| Chelmsford to Melgaco | 780.76 mi (1,256.52 km) |
| Chelmsford to Melres | 848.20 mi (1,365.04 km) |
| Chelmsford to Mira | 895.15 mi (1,440.60 km) |
| Chelmsford to Miranda do Corvo | 906.87 mi (1,459.46 km) |
| Chelmsford to Mirandela | 794.77 mi (1,279.05 km) |
| Chelmsford to Mogadouro | 794.71 mi (1,278.96 km) |
| Chelmsford to Moimenta da Beira | 835.86 mi (1,345.19 km) |
| Chelmsford to Moita | 1,012.48 mi (1,629.42 km) |
| Chelmsford to Moncao | 788.68 mi (1,269.26 km) |
