| Round Rock to Melzo | 5,481.96 mi (8,822.37 km) |
| Round Rock to Mendicino | 6,013.62 mi (9,677.99 km) |
| Round Rock to Menfi | 5,942.99 mi (9,564.32 km) |
| Round Rock to Mentana | 5,750.91 mi (9,255.20 km) |
| Round Rock to Merano | 5,506.89 mi (8,862.48 km) |
| Round Rock to Merate | 5,475.10 mi (8,811.31 km) |
| Round Rock to Mercato San Severino | 5,889.77 mi (9,478.67 km) |
| Round Rock to Mercogliano | 5,882.96 mi (9,467.71 km) |
| Round Rock to Mesagne | 6,024.36 mi (9,695.27 km) |
| Round Rock to Messina | 6,031.56 mi (9,706.86 km) |
| Round Rock to Mestre | 5,595.61 mi (9,005.27 km) |
| Round Rock to Mestrino | 5,578.45 mi (8,977.64 km) |
| Round Rock to Milan | 5,474.00 mi (8,809.56 km) |
| Round Rock to Milazzo | 6,016.91 mi (9,683.28 km) |
| Round Rock to Minerbio | 5,599.22 mi (9,011.08 km) |
