| Opelika to Mattoon (Illinois) | 499.51 mi (803.88 km) |
| Opelika to Mauldin (South Carolina) | 229.49 mi (369.33 km) |
| Opelika to Maumee (Ohio) | 622.67 mi (1,002.09 km) |
| Opelika to Maumelle (Arkansas) | 430.78 mi (693.27 km) |
| Opelika to Mayagüez (Puerto Rico) | 1,509.86 mi (2,429.88 km) |
| Opelika to Mayfield Heights (Ohio) | 648.79 mi (1,044.13 km) |
| Opelika to Mays Chapel (Maryland) | 675.06 mi (1,086.41 km) |
| Opelika to Maywood (California) | 1,888.39 mi (3,039.06 km) |
| Opelika to Maywood (Illinois) | 651.15 mi (1,047.92 km) |
| Opelika to McAlester (Oklahoma) | 616.80 mi (992.64 km) |
| Opelika to McAllen (Texas) | 891.93 mi (1,435.43 km) |
| Opelika to McCalla (Alabama) | 105.56 mi (169.89 km) |
| Opelika to McComb (Mississippi) | 314.27 mi (505.77 km) |
| Opelika to McDonough (Georgia) | 89.09 mi (143.38 km) |
| Opelika to McFarland (California) | 1,937.52 mi (3,118.13 km) |
