| Boiling Springs to Mangualde | 3,947.05 mi (6,352.17 km) |
| Boiling Springs to Marco de Canavezes | 3,914.28 mi (6,299.42 km) |
| Boiling Springs to Marinha Grande | 3,909.43 mi (6,291.63 km) |
| Boiling Springs to Massama | 3,916.32 mi (6,302.71 km) |
| Boiling Springs to Matosinhos | 3,887.34 mi (6,256.06 km) |
| Boiling Springs to Mealhada | 3,918.34 mi (6,305.96 km) |
| Boiling Springs to Melgaco | 3,887.16 mi (6,255.79 km) |
| Boiling Springs to Melres | 3,904.75 mi (6,284.08 km) |
| Boiling Springs to Mira | 3,903.15 mi (6,281.52 km) |
| Boiling Springs to Miranda do Corvo | 3,930.88 mi (6,326.13 km) |
| Boiling Springs to Mirandela | 3,954.43 mi (6,364.04 km) |
| Boiling Springs to Mogadouro | 3,980.67 mi (6,406.27 km) |
| Boiling Springs to Moimenta da Beira | 3,945.34 mi (6,349.41 km) |
| Boiling Springs to Moita | 3,933.63 mi (6,330.57 km) |
| Boiling Springs to Moncao | 3,877.81 mi (6,240.73 km) |
