| Hilton Head Island to Mangualde | 3,985.11 mi (6,413.42 km) |
| Hilton Head Island to Marco de Canavezes | 3,954.30 mi (6,363.83 km) |
| Hilton Head Island to Marinha Grande | 3,942.80 mi (6,345.32 km) |
| Hilton Head Island to Massama | 3,945.25 mi (6,349.27 km) |
| Hilton Head Island to Matosinhos | 3,926.81 mi (6,319.59 km) |
| Hilton Head Island to Mealhada | 3,954.80 mi (6,364.63 km) |
| Hilton Head Island to Melgaco | 3,930.88 mi (6,326.14 km) |
| Hilton Head Island to Melres | 3,944.04 mi (6,347.32 km) |
| Hilton Head Island to Mira | 3,939.52 mi (6,340.05 km) |
| Hilton Head Island to Miranda do Corvo | 3,966.30 mi (6,383.14 km) |
| Hilton Head Island to Mirandela | 3,996.63 mi (6,431.96 km) |
| Hilton Head Island to Mogadouro | 4,022.73 mi (6,473.96 km) |
| Hilton Head Island to Moimenta da Beira | 3,985.07 mi (6,413.35 km) |
| Hilton Head Island to Moita | 3,962.45 mi (6,376.95 km) |
| Hilton Head Island to Moncao | 3,921.14 mi (6,310.47 km) |
