| Costa Mesa to Mauldin (South Carolina) | 2,025.16 mi (3,259.17 km) |
| Costa Mesa to Maumee (Ohio) | 1,938.16 mi (3,119.17 km) |
| Costa Mesa to Maumelle (Arkansas) | 1,455.34 mi (2,342.14 km) |
| Costa Mesa to Mayagüez (Puerto Rico) | 3,295.09 mi (5,302.94 km) |
| Costa Mesa to Mayfield Heights (Ohio) | 2,051.89 mi (3,302.19 km) |
| Costa Mesa to Mays Chapel (Maryland) | 2,304.25 mi (3,708.33 km) |
| Costa Mesa to Maywood (California) | 27.25 mi (43.85 km) |
| Costa Mesa to Maywood (Illinois) | 1,726.95 mi (2,779.26 km) |
| Costa Mesa to McAlester (Oklahoma) | 1,264.18 mi (2,034.50 km) |
| Costa Mesa to McAllen (Texas) | 1,281.95 mi (2,063.10 km) |
| Costa Mesa to McCalla (Alabama) | 1,773.18 mi (2,853.65 km) |
| Costa Mesa to McComb (Mississippi) | 1,603.92 mi (2,581.27 km) |
| Costa Mesa to McDonough (Georgia) | 1,935.36 mi (3,114.66 km) |
| Costa Mesa to McFarland (California) | 158.13 mi (254.49 km) |
| Costa Mesa to McHenry (Illinois) | 1,709.77 mi (2,751.61 km) |
