| Niagara Falls to Montijo | 3,666.26 mi (5,900.27 km) |
| Niagara Falls to Montilla | 3,805.41 mi (6,124.22 km) |
| Niagara Falls to Montmelo | 3,978.19 mi (6,402.28 km) |
| Niagara Falls to Montornes del Valles | 3,979.31 mi (6,404.08 km) |
| Niagara Falls to Montoro | 3,801.78 mi (6,118.37 km) |
| Niagara Falls to Monzon | 3,874.33 mi (6,235.13 km) |
| Niagara Falls to Mora | 3,771.71 mi (6,069.98 km) |
| Niagara Falls to Moralzarzal | 3,729.05 mi (6,001.33 km) |
| Niagara Falls to Moron de la Frontera | 3,783.24 mi (6,088.54 km) |
| Niagara Falls to Mostoles | 3,745.34 mi (6,027.54 km) |
| Niagara Falls to Motril | 3,887.87 mi (6,256.93 km) |
| Niagara Falls to Muchamiel | 3,970.15 mi (6,389.33 km) |
| Niagara Falls to Mula | 3,935.48 mi (6,333.55 km) |
| Niagara Falls to Munguia | 3,690.90 mi (5,939.94 km) |
| Niagara Falls to Murcia | 3,954.18 mi (6,363.64 km) |
