| Round Rock to Marsala | 5,911.62 mi (9,513.83 km) |
| Round Rock to Marsciano | 5,701.72 mi (9,176.03 km) |
| Round Rock to Martano | 6,060.76 mi (9,753.85 km) |
| Round Rock to Martellago | 5,590.20 mi (8,996.55 km) |
| Round Rock to Martina Franca | 5,999.51 mi (9,655.27 km) |
| Round Rock to Martinengo | 5,493.51 mi (8,840.94 km) |
| Round Rock to Martinsicuro | 5,768.09 mi (9,282.85 km) |
| Round Rock to Mascali | 6,034.90 mi (9,712.24 km) |
| Round Rock to Mascalucia | 6,036.06 mi (9,714.10 km) |
| Round Rock to Masera di Padova | 5,587.68 mi (8,992.50 km) |
| Round Rock to Maserada sul Piave | 5,588.47 mi (8,993.77 km) |
| Round Rock to Massa | 5,567.12 mi (8,959.42 km) |
| Round Rock to Massa Lombarda | 5,619.78 mi (9,044.16 km) |
| Round Rock to Massafra | 5,995.64 mi (9,649.05 km) |
| Round Rock to Massalubrense | 5,879.20 mi (9,461.66 km) |
