| Security-Widefield to Mangualde | 4,863.21 mi (7,826.58 km) |
| Security-Widefield to Marco de Canavezes | 4,823.79 mi (7,763.14 km) |
| Security-Widefield to Marinha Grande | 4,845.74 mi (7,798.46 km) |
| Security-Widefield to Massama | 4,869.52 mi (7,836.73 km) |
| Security-Widefield to Matosinhos | 4,800.14 mi (7,725.08 km) |
| Security-Widefield to Mealhada | 4,842.07 mi (7,792.57 km) |
| Security-Widefield to Melgaco | 4,782.56 mi (7,696.79 km) |
| Security-Widefield to Melres | 4,817.58 mi (7,753.15 km) |
| Security-Widefield to Mira | 4,827.82 mi (7,769.63 km) |
| Security-Widefield to Miranda do Corvo | 4,858.24 mi (7,818.58 km) |
| Security-Widefield to Mirandela | 4,853.32 mi (7,810.66 km) |
| Security-Widefield to Mogadouro | 4,879.09 mi (7,852.14 km) |
| Security-Widefield to Moimenta da Beira | 4,854.78 mi (7,813.01 km) |
| Security-Widefield to Moita | 4,886.64 mi (7,864.29 km) |
| Security-Widefield to Moncao | 4,775.17 mi (7,684.89 km) |
