| Castelldefels to Mombris | 698.58 mi (1,124.25 km) |
| Castelldefels to Monchengladbach | 717.38 mi (1,154.52 km) |
| Castelldefels to Monschau | 673.08 mi (1,083.22 km) |
| Castelldefels to Montabaur | 691.96 mi (1,113.60 km) |
| Castelldefels to Moosburg | 694.77 mi (1,118.12 km) |
| Castelldefels to Morbach | 639.73 mi (1,029.55 km) |
| Castelldefels to Morfelden-Walldorf | 681.16 mi (1,096.23 km) |
| Castelldefels to Morlenbach | 661.03 mi (1,063.82 km) |
| Castelldefels to Morsbach | 716.70 mi (1,153.42 km) |
| Castelldefels to Mosbach | 656.91 mi (1,057.19 km) |
| Castelldefels to Mosigkau | 875.15 mi (1,408.42 km) |
| Castelldefels to Mossingen | 601.73 mi (968.40 km) |
| Castelldefels to Much | 714.24 mi (1,149.46 km) |
| Castelldefels to Mucheln | 834.61 mi (1,343.18 km) |
| Castelldefels to Muhlacker | 626.15 mi (1,007.70 km) |
