| Rio Grande City to Mombris | 5,569.73 mi (8,963.61 km) |
| Rio Grande City to Monchengladbach | 5,426.97 mi (8,733.86 km) |
| Rio Grande City to Monschau | 5,441.01 mi (8,756.47 km) |
| Rio Grande City to Montabaur | 5,505.58 mi (8,860.38 km) |
| Rio Grande City to Moosburg | 5,733.75 mi (9,227.58 km) |
| Rio Grande City to Morbach | 5,498.96 mi (8,849.72 km) |
| Rio Grande City to Morfelden-Walldorf | 5,549.63 mi (8,931.26 km) |
| Rio Grande City to Morlenbach | 5,569.39 mi (8,963.07 km) |
| Rio Grande City to Morsbach | 5,486.95 mi (8,830.39 km) |
| Rio Grande City to Mosbach | 5,593.87 mi (9,002.47 km) |
| Rio Grande City to Mosigkau | 5,620.50 mi (9,045.33 km) |
| Rio Grande City to Mossingen | 5,623.44 mi (9,050.04 km) |
| Rio Grande City to Much | 5,473.20 mi (8,808.27 km) |
| Rio Grande City to Mucheln | 5,624.34 mi (9,051.50 km) |
| Rio Grande City to Muhlacker | 5,595.89 mi (9,005.72 km) |
