| Riviera Beach to Mattoon (Illinois) | 998.61 mi (1,607.11 km) |
| Riviera Beach to Mauldin (South Carolina) | 568.36 mi (914.69 km) |
| Riviera Beach to Maumee (Ohio) | 1,041.90 mi (1,676.78 km) |
| Riviera Beach to Maumelle (Arkansas) | 918.44 mi (1,478.09 km) |
| Riviera Beach to Mayagüez (Puerto Rico) | 1,015.36 mi (1,634.06 km) |
| Riviera Beach to Mayfield Heights (Ohio) | 1,021.18 mi (1,643.42 km) |
| Riviera Beach to Mays Chapel (Maryland) | 896.19 mi (1,442.28 km) |
| Riviera Beach to Maywood (California) | 2,311.81 mi (3,720.50 km) |
| Riviera Beach to Maywood (Illinois) | 1,132.25 mi (1,822.18 km) |
| Riviera Beach to McAlester (Oklahoma) | 1,085.98 mi (1,747.71 km) |
| Riviera Beach to McAllen (Texas) | 1,123.36 mi (1,807.87 km) |
| Riviera Beach to McCalla (Alabama) | 612.92 mi (986.40 km) |
| Riviera Beach to McComb (Mississippi) | 699.38 mi (1,125.55 km) |
| Riviera Beach to McDonough (Georgia) | 520.45 mi (837.59 km) |
| Riviera Beach to McFarland (California) | 2,377.42 mi (3,826.08 km) |
