| Mason City to Montijo | 4,310.97 mi (6,937.83 km) |
| Mason City to Montilla | 4,451.82 mi (7,164.51 km) |
| Mason City to Montmelo | 4,581.53 mi (7,373.25 km) |
| Mason City to Montornes del Valles | 4,582.66 mi (7,375.07 km) |
| Mason City to Montoro | 4,445.26 mi (7,153.95 km) |
| Mason City to Monzon | 4,481.91 mi (7,212.94 km) |
| Mason City to Mora | 4,404.38 mi (7,088.17 km) |
| Mason City to Moralzarzal | 4,356.51 mi (7,011.12 km) |
| Mason City to Moron de la Frontera | 4,434.16 mi (7,136.10 km) |
| Mason City to Mostoles | 4,374.52 mi (7,040.11 km) |
| Mason City to Motril | 4,535.47 mi (7,299.14 km) |
| Mason City to Muchamiel | 4,600.27 mi (7,403.43 km) |
| Mason City to Mula | 4,570.69 mi (7,355.82 km) |
| Mason City to Munguia | 4,298.27 mi (6,917.39 km) |
| Mason City to Murcia | 4,588.65 mi (7,384.71 km) |
