| Niagara Falls to Miranda de Ebro | 3,708.99 mi (5,969.04 km) |
| Niagara Falls to Mislata | 3,933.09 mi (6,329.69 km) |
| Niagara Falls to Moana | 3,458.37 mi (5,565.71 km) |
| Niagara Falls to Moguer | 3,712.22 mi (5,974.25 km) |
| Niagara Falls to Molina de Segura | 3,947.85 mi (6,353.45 km) |
| Niagara Falls to Molins de Rey | 3,972.87 mi (6,393.71 km) |
| Niagara Falls to Mollerusa | 3,915.44 mi (6,301.30 km) |
| Niagara Falls to Mollet | 3,977.14 mi (6,400.58 km) |
| Niagara Falls to Moncada | 3,977.88 mi (6,401.78 km) |
| Niagara Falls to Moncada | 3,931.46 mi (6,327.08 km) |
| Niagara Falls to Monforte de Lemos | 3,507.56 mi (5,644.88 km) |
| Niagara Falls to Monforte del Cid | 3,958.31 mi (6,370.28 km) |
| Niagara Falls to Mongat | 3,982.63 mi (6,409.42 km) |
| Niagara Falls to Monovar | 3,951.24 mi (6,358.91 km) |
| Niagara Falls to Monserrat | 3,928.76 mi (6,322.72 km) |
