| Morro Bay to Mattoon (Illinois) | 1,795.12 mi (2,888.96 km) |
| Morro Bay to Mauldin (South Carolina) | 2,165.95 mi (3,485.76 km) |
| Morro Bay to Maumee (Ohio) | 2,040.19 mi (3,283.37 km) |
| Morro Bay to Maumelle (Arkansas) | 1,602.77 mi (2,579.41 km) |
| Morro Bay to Mayagüez (Puerto Rico) | 3,472.64 mi (5,588.67 km) |
| Morro Bay to Mayfield Heights (Ohio) | 2,154.53 mi (3,467.38 km) |
| Morro Bay to Mays Chapel (Maryland) | 2,417.83 mi (3,891.12 km) |
| Morro Bay to Maywood (California) | 178.70 mi (287.59 km) |
| Morro Bay to Maywood (Illinois) | 1,825.27 mi (2,937.49 km) |
| Morro Bay to McAlester (Oklahoma) | 1,413.16 mi (2,274.26 km) |
| Morro Bay to McAllen (Texas) | 1,477.95 mi (2,378.54 km) |
| Morro Bay to McCalla (Alabama) | 1,925.38 mi (3,098.60 km) |
| Morro Bay to McComb (Mississippi) | 1,769.98 mi (2,848.51 km) |
| Morro Bay to McDonough (Georgia) | 2,084.33 mi (3,354.41 km) |
| Morro Bay to McFarland (California) | 92.86 mi (149.45 km) |
