| Knightdale to Mangualde | 3,750.44 mi (6,035.76 km) |
| Knightdale to Marco de Canavezes | 3,718.15 mi (5,983.78 km) |
| Knightdale to Marinha Grande | 3,711.72 mi (5,973.44 km) |
| Knightdale to Massama | 3,717.69 mi (5,983.04 km) |
| Knightdale to Matosinhos | 3,691.06 mi (5,940.18 km) |
| Knightdale to Mealhada | 3,721.34 mi (5,988.92 km) |
| Knightdale to Melgaco | 3,691.99 mi (5,941.69 km) |
| Knightdale to Melres | 3,708.43 mi (5,968.14 km) |
| Knightdale to Mira | 3,706.13 mi (5,964.43 km) |
| Knightdale to Miranda do Corvo | 3,733.64 mi (6,008.71 km) |
| Knightdale to Mirandela | 3,758.88 mi (6,049.33 km) |
| Knightdale to Mogadouro | 3,785.09 mi (6,091.51 km) |
| Knightdale to Moimenta da Beira | 3,749.14 mi (6,033.66 km) |
| Knightdale to Moita | 3,734.98 mi (6,010.87 km) |
| Knightdale to Moncao | 3,682.53 mi (5,926.46 km) |
