| Iona to Mangualde | 4,256.48 mi (6,850.15 km) |
| Iona to Marco de Canavezes | 4,228.56 mi (6,805.21 km) |
| Iona to Marinha Grande | 4,207.90 mi (6,771.95 km) |
| Iona to Massama | 4,204.06 mi (6,765.78 km) |
| Iona to Matosinhos | 4,200.50 mi (6,760.05 km) |
| Iona to Mealhada | 4,224.13 mi (6,798.08 km) |
| Iona to Melgaco | 4,210.33 mi (6,775.87 km) |
| Iona to Melres | 4,217.37 mi (6,787.21 km) |
| Iona to Mira | 4,208.84 mi (6,773.47 km) |
| Iona to Miranda do Corvo | 4,234.12 mi (6,814.16 km) |
| Iona to Mirandela | 4,273.63 mi (6,877.74 km) |
| Iona to Mogadouro | 4,299.37 mi (6,919.17 km) |
| Iona to Moimenta da Beira | 4,258.74 mi (6,853.78 km) |
| Iona to Moita | 4,220.97 mi (6,793.00 km) |
| Iona to Moncao | 4,200.14 mi (6,759.47 km) |
