| Philadelphia to Mangualde | 3,457.97 mi (5,565.07 km) |
| Philadelphia to Marco de Canavezes | 3,423.93 mi (5,510.28 km) |
| Philadelphia to Marinha Grande | 3,423.85 mi (5,510.15 km) |
| Philadelphia to Massama | 3,434.17 mi (5,526.76 km) |
| Philadelphia to Matosinhos | 3,397.41 mi (5,467.61 km) |
| Philadelphia to Mealhada | 3,430.46 mi (5,520.79 km) |
| Philadelphia to Melgaco | 3,394.45 mi (5,462.84 km) |
| Philadelphia to Melres | 3,414.91 mi (5,495.76 km) |
| Philadelphia to Mira | 3,415.37 mi (5,496.51 km) |
| Philadelphia to Miranda do Corvo | 3,443.71 mi (5,542.12 km) |
| Philadelphia to Mirandela | 3,462.55 mi (5,572.43 km) |
| Philadelphia to Mogadouro | 3,488.83 mi (5,614.73 km) |
| Philadelphia to Moimenta da Beira | 3,455.11 mi (5,560.47 km) |
| Philadelphia to Moita | 3,451.52 mi (5,554.69 km) |
| Philadelphia to Moncao | 3,385.35 mi (5,448.20 km) |
