| Rio Grande City to Mirfield | 5,044.81 mi (8,118.84 km) |
| Rio Grande City to Mitcham | 5,164.80 mi (8,311.94 km) |
| Rio Grande City to Mold | 5,002.23 mi (8,050.31 km) |
| Rio Grande City to Molesey | 5,156.43 mi (8,298.47 km) |
| Rio Grande City to Monkseaton | 5,018.86 mi (8,077.08 km) |
| Rio Grande City to Monmouth | 5,052.14 mi (8,130.63 km) |
| Rio Grande City to Montrose | 4,941.50 mi (7,952.57 km) |
| Rio Grande City to Morden | 5,163.07 mi (8,309.16 km) |
| Rio Grande City to Morecambe | 4,990.16 mi (8,030.89 km) |
| Rio Grande City to Moreton | 4,997.34 mi (8,042.43 km) |
| Rio Grande City to Morley | 5,046.35 mi (8,121.32 km) |
| Rio Grande City to Morpeth | 5,007.20 mi (8,058.31 km) |
| Rio Grande City to Morriston | 5,007.05 mi (8,058.07 km) |
| Rio Grande City to Mosbrough | 5,066.42 mi (8,153.61 km) |
| Rio Grande City to Mossley | 5,035.68 mi (8,104.14 km) |
