| Round Rock to Miranda de Ebro | 5,044.80 mi (8,118.82 km) |
| Round Rock to Mislata | 5,262.90 mi (8,469.82 km) |
| Round Rock to Moana | 4,786.71 mi (7,703.46 km) |
| Round Rock to Moguer | 5,021.51 mi (8,081.35 km) |
| Round Rock to Molina de Segura | 5,271.58 mi (8,483.79 km) |
| Round Rock to Molins de Rey | 5,310.31 mi (8,546.12 km) |
| Round Rock to Mollerusa | 5,252.35 mi (8,452.84 km) |
| Round Rock to Mollet | 5,314.98 mi (8,553.64 km) |
| Round Rock to Moncada | 5,315.61 mi (8,554.66 km) |
| Round Rock to Moncada | 5,261.52 mi (8,467.60 km) |
| Round Rock to Monforte de Lemos | 4,838.18 mi (7,786.30 km) |
| Round Rock to Monforte del Cid | 5,284.02 mi (8,503.80 km) |
| Round Rock to Mongat | 5,320.40 mi (8,562.36 km) |
| Round Rock to Monovar | 5,276.99 mi (8,492.49 km) |
| Round Rock to Monserrat | 5,257.94 mi (8,461.84 km) |
