| Guadarrama to Massarosa | 768.53 mi (1,236.83 km) |
| Guadarrama to Matelica | 894.70 mi (1,439.89 km) |
| Guadarrama to Matera | 1,081.70 mi (1,740.83 km) |
| Guadarrama to Matino | 1,167.80 mi (1,879.40 km) |
| Guadarrama to Mazzarino | 1,007.46 mi (1,621.36 km) |
| Guadarrama to Meda | 750.52 mi (1,207.85 km) |
| Guadarrama to Medesano | 773.74 mi (1,245.22 km) |
| Guadarrama to Medicina | 840.53 mi (1,352.70 km) |
| Guadarrama to Meldola | 855.80 mi (1,377.28 km) |
| Guadarrama to Melegnano | 749.70 mi (1,206.53 km) |
| Guadarrama to Melendugno | 1,175.70 mi (1,892.11 km) |
| Guadarrama to Melfi | 1,029.89 mi (1,657.45 km) |
| Guadarrama to Melilli | 1,057.75 mi (1,702.29 km) |
| Guadarrama to Melito di Napoli | 956.78 mi (1,539.79 km) |
| Guadarrama to Melito di Porto Salvo | 1,077.10 mi (1,733.42 km) |
