| Round Rock to Montijo | 4,983.96 mi (8,020.91 km) |
| Round Rock to Montilla | 5,120.84 mi (8,241.20 km) |
| Round Rock to Montmelo | 5,316.11 mi (8,555.45 km) |
| Round Rock to Montornes del Valles | 5,317.22 mi (8,557.24 km) |
| Round Rock to Montoro | 5,119.65 mi (8,239.28 km) |
| Round Rock to Monzon | 5,211.20 mi (8,386.61 km) |
| Round Rock to Mora | 5,097.36 mi (8,203.41 km) |
| Round Rock to Moralzarzal | 5,057.92 mi (8,139.93 km) |
| Round Rock to Moron de la Frontera | 5,094.77 mi (8,199.24 km) |
| Round Rock to Mostoles | 5,073.18 mi (8,164.49 km) |
| Round Rock to Motril | 5,201.74 mi (8,371.40 km) |
| Round Rock to Muchamiel | 5,296.43 mi (8,523.78 km) |
| Round Rock to Mula | 5,258.69 mi (8,463.04 km) |
| Round Rock to Munguia | 5,028.31 mi (8,092.28 km) |
| Round Rock to Murcia | 5,277.80 mi (8,493.80 km) |
