| Castlebar to Montigny-les-Metz | 739.73 mi (1,190.48 km) |
| Castlebar to Montivilliers | 503.19 mi (809.81 km) |
| Castlebar to Montlouis-sur-Loire | 628.93 mi (1,012.16 km) |
| Castlebar to Montlucon | 738.59 mi (1,188.64 km) |
| Castlebar to Montmagny | 603.64 mi (971.47 km) |
| Castlebar to Montmorency | 602.10 mi (968.98 km) |
| Castlebar to Montpellier | 925.38 mi (1,489.26 km) |
| Castlebar to Montreuil | 611.96 mi (984.86 km) |
| Castlebar to Montrouge | 609.57 mi (981.01 km) |
| Castlebar to Morangis | 614.89 mi (989.57 km) |
| Castlebar to Morieres-les-Avignon | 937.82 mi (1,509.28 km) |
| Castlebar to Morlaix | 434.81 mi (699.76 km) |
| Castlebar to Morsang-sur-Orge | 617.27 mi (993.39 km) |
| Castlebar to Mouans-Sartoux | 1,020.31 mi (1,642.03 km) |
| Castlebar to Mougins | 1,022.10 mi (1,644.91 km) |
