| Niagara Falls to Mancha Real | 3,846.00 mi (6,189.54 km) |
| Niagara Falls to Manilva | 3,819.24 mi (6,146.47 km) |
| Niagara Falls to Manises | 3,931.22 mi (6,326.69 km) |
| Niagara Falls to Manlleu | 3,963.77 mi (6,379.08 km) |
| Niagara Falls to Manresa | 3,953.46 mi (6,362.48 km) |
| Niagara Falls to Manzanares | 3,814.28 mi (6,138.49 km) |
| Niagara Falls to Manzanares el Real | 3,732.24 mi (6,006.45 km) |
| Niagara Falls to Maracena | 3,866.09 mi (6,221.86 km) |
| Niagara Falls to Marbella | 3,831.81 mi (6,166.70 km) |
| Niagara Falls to Marchena | 3,777.40 mi (6,079.15 km) |
| Niagara Falls to Marin | 3,457.30 mi (5,563.98 km) |
| Niagara Falls to Marratxi | 4,070.31 mi (6,550.53 km) |
| Niagara Falls to Martorell | 3,966.92 mi (6,384.15 km) |
| Niagara Falls to Martos | 3,831.92 mi (6,166.88 km) |
| Niagara Falls to Masamagrell | 3,933.56 mi (6,330.46 km) |
