| Round Rock to Montevarchi | 5,645.99 mi (9,086.34 km) |
| Round Rock to Monticello Conte Otto | 5,565.26 mi (8,956.42 km) |
| Round Rock to Montichiari | 5,524.60 mi (8,890.99 km) |
| Round Rock to Montignoso | 5,569.14 mi (8,962.67 km) |
| Round Rock to Montopoli in Val d'Arno | 5,606.76 mi (9,023.21 km) |
| Round Rock to Monza | 5,473.01 mi (8,807.96 km) |
| Round Rock to Morbegno | 5,464.13 mi (8,793.67 km) |
| Round Rock to Mori | 5,531.62 mi (8,902.28 km) |
| Round Rock to Morlupo | 5,739.76 mi (9,237.25 km) |
| Round Rock to Morrovalle | 5,736.85 mi (9,232.56 km) |
| Round Rock to Mortara | 5,464.17 mi (8,793.74 km) |
| Round Rock to Mosciano Sant'Angelo | 5,772.18 mi (9,289.42 km) |
| Round Rock to Motta di Livenza | 5,598.82 mi (9,010.42 km) |
| Round Rock to Motta Sant'Anastasia | 6,035.22 mi (9,712.75 km) |
| Round Rock to Mottola | 5,990.06 mi (9,640.08 km) |
