| Niederkassel to Montilla | 1,078.75 mi (1,736.08 km) |
| Niederkassel to Montmelo | 679.25 mi (1,093.14 km) |
| Niederkassel to Montornes del Valles | 679.65 mi (1,093.80 km) |
| Niederkassel to Montoro | 1,045.92 mi (1,683.24 km) |
| Niederkassel to Monzon | 695.83 mi (1,119.84 km) |
| Niederkassel to Mora | 929.63 mi (1,496.10 km) |
| Niederkassel to Moralzarzal | 876.90 mi (1,411.23 km) |
| Niederkassel to Moron de la Frontera | 1,128.28 mi (1,815.79 km) |
| Niederkassel to Mostoles | 893.83 mi (1,438.48 km) |
| Niederkassel to Motril | 1,102.70 mi (1,774.63 km) |
| Niederkassel to Muchamiel | 931.41 mi (1,498.97 km) |
| Niederkassel to Mula | 976.19 mi (1,571.02 km) |
| Niederkassel to Munguia | 692.99 mi (1,115.26 km) |
| Niederkassel to Murcia | 972.38 mi (1,564.89 km) |
| Niederkassel to Muro del Alcoy | 907.60 mi (1,460.65 km) |
