| Fort Collins to Mangualde | 4,803.95 mi (7,731.21 km) |
| Fort Collins to Marco de Canavezes | 4,763.91 mi (7,666.77 km) |
| Fort Collins to Marinha Grande | 4,789.00 mi (7,707.15 km) |
| Fort Collins to Massama | 4,814.79 mi (7,748.66 km) |
| Fort Collins to Matosinhos | 4,740.75 mi (7,629.50 km) |
| Fort Collins to Mealhada | 4,783.81 mi (7,698.81 km) |
| Fort Collins to Melgaco | 4,721.21 mi (7,598.06 km) |
| Fort Collins to Melres | 4,758.12 mi (7,657.46 km) |
| Fort Collins to Mira | 4,769.74 mi (7,676.15 km) |
| Fort Collins to Miranda do Corvo | 4,800.35 mi (7,725.42 km) |
| Fort Collins to Mirandela | 4,792.07 mi (7,712.09 km) |
| Fort Collins to Mogadouro | 4,817.68 mi (7,753.30 km) |
| Fort Collins to Moimenta da Beira | 4,794.76 mi (7,716.41 km) |
| Fort Collins to Moita | 4,831.83 mi (7,776.07 km) |
| Fort Collins to Moncao | 4,714.08 mi (7,586.58 km) |
