| McKeesport to Mangualde | 3,674.22 mi (5,913.08 km) |
| McKeesport to Marco de Canavezes | 3,639.01 mi (5,856.42 km) |
| McKeesport to Marinha Grande | 3,643.21 mi (5,863.18 km) |
| McKeesport to Massama | 3,656.19 mi (5,884.06 km) |
| McKeesport to Matosinhos | 3,612.96 mi (5,814.49 km) |
| McKeesport to Mealhada | 3,647.85 mi (5,870.65 km) |
| McKeesport to Melgaco | 3,607.14 mi (5,805.13 km) |
| McKeesport to Melres | 3,630.50 mi (5,842.73 km) |
| McKeesport to Mira | 3,632.87 mi (5,846.54 km) |
| McKeesport to Miranda do Corvo | 3,661.71 mi (5,892.95 km) |
| McKeesport to Mirandela | 3,676.01 mi (5,915.96 km) |
| McKeesport to Mogadouro | 3,702.29 mi (5,958.26 km) |
| McKeesport to Moimenta da Beira | 3,670.27 mi (5,906.73 km) |
| McKeesport to Moita | 3,673.55 mi (5,912.00 km) |
| McKeesport to Moncao | 3,598.34 mi (5,790.97 km) |
