| Spring Hill to Mangualde | 4,210.80 mi (6,776.64 km) |
| Spring Hill to Marco de Canavezes | 4,181.56 mi (6,729.58 km) |
| Spring Hill to Marinha Grande | 4,164.95 mi (6,702.85 km) |
| Spring Hill to Massama | 4,163.87 mi (6,701.10 km) |
| Spring Hill to Matosinhos | 4,153.73 mi (6,684.79 km) |
| Spring Hill to Mealhada | 4,179.33 mi (6,725.98 km) |
| Spring Hill to Melgaco | 4,160.97 mi (6,696.44 km) |
| Spring Hill to Melres | 4,170.78 mi (6,712.22 km) |
| Spring Hill to Mira | 4,164.03 mi (6,701.36 km) |
| Spring Hill to Miranda do Corvo | 4,190.00 mi (6,743.15 km) |
| Spring Hill to Mirandela | 4,225.44 mi (6,800.19 km) |
| Spring Hill to Mogadouro | 4,251.36 mi (6,841.91 km) |
| Spring Hill to Moimenta da Beira | 4,212.03 mi (6,778.62 km) |
| Spring Hill to Moita | 4,180.93 mi (6,728.55 km) |
| Spring Hill to Moncao | 4,150.98 mi (6,680.36 km) |
