| Round Lake Beach to Mangualde | 3,993.09 mi (6,426.26 km) |
| Round Lake Beach to Marco de Canavezes | 3,955.34 mi (6,365.50 km) |
| Round Lake Beach to Marinha Grande | 3,969.89 mi (6,388.92 km) |
| Round Lake Beach to Massama | 3,989.36 mi (6,420.25 km) |
| Round Lake Beach to Matosinhos | 3,930.57 mi (6,325.65 km) |
| Round Lake Beach to Mealhada | 3,969.67 mi (6,388.57 km) |
| Round Lake Beach to Melgaco | 3,918.01 mi (6,305.43 km) |
| Round Lake Beach to Melres | 3,948.12 mi (6,353.89 km) |
| Round Lake Beach to Mira | 3,955.06 mi (6,365.06 km) |
| Round Lake Beach to Miranda do Corvo | 3,984.92 mi (6,413.11 km) |
| Round Lake Beach to Mirandela | 3,988.21 mi (6,418.41 km) |
| Round Lake Beach to Mogadouro | 4,014.31 mi (6,460.40 km) |
| Round Lake Beach to Moimenta da Beira | 3,986.55 mi (6,415.74 km) |
| Round Lake Beach to Moita | 4,006.63 mi (6,448.04 km) |
| Round Lake Beach to Moncao | 3,909.97 mi (6,292.49 km) |
