| Richfield to Mangualde | 4,140.02 mi (6,662.72 km) |
| Richfield to Marco de Canavezes | 4,100.41 mi (6,598.98 km) |
| Richfield to Marinha Grande | 4,123.54 mi (6,636.20 km) |
| Richfield to Massama | 4,148.40 mi (6,676.20 km) |
| Richfield to Matosinhos | 4,076.91 mi (6,561.15 km) |
| Richfield to Mealhada | 4,119.23 mi (6,629.27 km) |
| Richfield to Melgaco | 4,058.85 mi (6,532.08 km) |
| Richfield to Melres | 4,094.33 mi (6,589.19 km) |
| Richfield to Mira | 4,105.05 mi (6,606.44 km) |
| Richfield to Miranda do Corvo | 4,135.55 mi (6,655.52 km) |
| Richfield to Mirandela | 4,129.63 mi (6,645.99 km) |
| Richfield to Mogadouro | 4,155.37 mi (6,687.42 km) |
| Richfield to Moimenta da Beira | 4,131.37 mi (6,648.79 km) |
| Richfield to Moita | 4,165.47 mi (6,703.67 km) |
| Richfield to Moncao | 4,051.50 mi (6,520.26 km) |
