| Pottstown to Mangualde | 3,475.82 mi (5,593.79 km) |
| Pottstown to Marco de Canavezes | 3,441.52 mi (5,538.59 km) |
| Pottstown to Marinha Grande | 3,442.37 mi (5,539.96 km) |
| Pottstown to Massama | 3,453.29 mi (5,557.53 km) |
| Pottstown to Matosinhos | 3,415.10 mi (5,496.07 km) |
| Pottstown to Mealhada | 3,448.55 mi (5,549.91 km) |
| Pottstown to Melgaco | 3,411.54 mi (5,490.34 km) |
| Pottstown to Melres | 3,432.61 mi (5,524.25 km) |
| Pottstown to Mira | 3,433.48 mi (5,525.66 km) |
| Pottstown to Miranda do Corvo | 3,461.94 mi (5,571.45 km) |
| Pottstown to Mirandela | 3,479.80 mi (5,600.20 km) |
| Pottstown to Mogadouro | 3,506.09 mi (5,642.50 km) |
| Pottstown to Moimenta da Beira | 3,472.73 mi (5,588.81 km) |
| Pottstown to Moita | 3,470.65 mi (5,585.47 km) |
| Pottstown to Moncao | 3,402.50 mi (5,475.79 km) |
