| Round Rock to Manerbio | 5,516.06 mi (8,877.23 km) |
| Round Rock to Manfredonia | 5,901.74 mi (9,497.93 km) |
| Round Rock to Maniago | 5,587.68 mi (8,992.50 km) |
| Round Rock to Mantova | 5,550.72 mi (8,933.03 km) |
| Round Rock to Maranello | 5,577.92 mi (8,976.79 km) |
| Round Rock to Marano di Napoli | 5,860.52 mi (9,431.59 km) |
| Round Rock to Marano Vicentino | 5,555.38 mi (8,940.52 km) |
| Round Rock to Marcianise | 5,859.91 mi (9,430.61 km) |
| Round Rock to Marcon | 5,595.53 mi (9,005.13 km) |
| Round Rock to Mareno di Piave | 5,586.27 mi (8,990.23 km) |
| Round Rock to Margherita di Savoia | 5,922.55 mi (9,531.43 km) |
| Round Rock to Mariano Comense | 5,464.98 mi (8,795.03 km) |
| Round Rock to Marigliano | 5,870.31 mi (9,447.35 km) |
| Round Rock to Marino | 5,761.66 mi (9,272.50 km) |
| Round Rock to Marostica | 5,562.43 mi (8,951.86 km) |
