| Monroe to Mangualde | 4,531.80 mi (7,293.23 km) |
| Monroe to Marco de Canavezes | 4,497.65 mi (7,238.27 km) |
| Monroe to Marinha Grande | 4,497.55 mi (7,238.10 km) |
| Monroe to Massama | 4,507.24 mi (7,253.70 km) |
| Monroe to Matosinhos | 4,471.18 mi (7,195.68 km) |
| Monroe to Mealhada | 4,504.31 mi (7,248.99 km) |
| Monroe to Melgaco | 4,467.72 mi (7,190.11 km) |
| Monroe to Melres | 4,488.69 mi (7,223.84 km) |
| Monroe to Mira | 4,489.22 mi (7,224.70 km) |
| Monroe to Miranda do Corvo | 4,517.54 mi (7,270.28 km) |
| Monroe to Mirandela | 4,536.01 mi (7,300.00 km) |
| Monroe to Mogadouro | 4,562.29 mi (7,342.30 km) |
| Monroe to Moimenta da Beira | 4,528.85 mi (7,288.48 km) |
| Monroe to Moita | 4,524.59 mi (7,281.62 km) |
| Monroe to Moncao | 4,458.70 mi (7,175.58 km) |
