| Barcelona to Mombris | 687.54 mi (1,106.49 km) |
| Barcelona to Monchengladbach | 707.80 mi (1,139.09 km) |
| Barcelona to Monschau | 663.41 mi (1,067.65 km) |
| Barcelona to Montabaur | 681.54 mi (1,096.83 km) |
| Barcelona to Moosburg | 682.61 mi (1,098.55 km) |
| Barcelona to Morbach | 629.43 mi (1,012.96 km) |
| Barcelona to Morfelden-Walldorf | 670.31 mi (1,078.76 km) |
| Barcelona to Morlenbach | 649.99 mi (1,046.05 km) |
| Barcelona to Morsbach | 706.45 mi (1,136.93 km) |
| Barcelona to Mosbach | 645.65 mi (1,039.07 km) |
| Barcelona to Mosigkau | 863.82 mi (1,390.19 km) |
| Barcelona to Mossingen | 590.18 mi (949.80 km) |
| Barcelona to Much | 704.14 mi (1,133.21 km) |
| Barcelona to Mucheln | 823.24 mi (1,324.87 km) |
| Barcelona to Muhlacker | 614.86 mi (989.51 km) |
