| Richland to Mattoon (Illinois) | 1,623.40 mi (2,612.61 km) |
| Richland to Mauldin (South Carolina) | 2,075.53 mi (3,340.25 km) |
| Richland to Maumee (Ohio) | 1,787.11 mi (2,876.07 km) |
| Richland to Maumelle (Arkansas) | 1,606.05 mi (2,584.69 km) |
| Richland to Mayagüez (Puerto Rico) | 3,527.68 mi (5,677.25 km) |
| Richland to Mayfield Heights (Ohio) | 1,893.88 mi (3,047.90 km) |
| Richland to Mays Chapel (Maryland) | 2,183.30 mi (3,513.68 km) |
| Richland to Maywood (California) | 851.40 mi (1,370.20 km) |
| Richland to Maywood (Illinois) | 1,579.44 mi (2,541.87 km) |
| Richland to McAlester (Oklahoma) | 1,453.58 mi (2,339.31 km) |
| Richland to McAllen (Texas) | 1,803.68 mi (2,902.74 km) |
| Richland to McCalla (Alabama) | 1,914.98 mi (3,081.87 km) |
| Richland to McComb (Mississippi) | 1,851.97 mi (2,980.45 km) |
| Richland to McDonough (Georgia) | 2,042.24 mi (3,286.67 km) |
| Richland to McFarland (California) | 732.69 mi (1,179.15 km) |
