| Guaynabo to Marysville (California) | 3,589.87 mi (5,777.34 km) |
| Guaynabo to Marysville (Ohio) | 1,824.87 mi (2,936.84 km) |
| Guaynabo to Marysville (Washington) | 3,726.10 mi (5,996.58 km) |
| Guaynabo to Maryville (Missouri) | 2,283.18 mi (3,674.42 km) |
| Guaynabo to Maryville (Tennessee) | 1,621.40 mi (2,609.39 km) |
| Guaynabo to Mason (Ohio) | 1,811.84 mi (2,915.88 km) |
| Guaynabo to Mason City (Iowa) | 2,327.45 mi (3,745.66 km) |
| Guaynabo to Massapequa (New York) | 1,600.43 mi (2,575.65 km) |
| Guaynabo to Massapequa Park (New York) | 1,601.02 mi (2,576.59 km) |
| Guaynabo to Massillon (Ohio) | 1,797.25 mi (2,892.39 km) |
| Guaynabo to Mastic (New York) | 1,600.16 mi (2,575.20 km) |
| Guaynabo to Mastic Beach (New York) | 1,597.13 mi (2,570.33 km) |
| Guaynabo to Matteson (Illinois) | 2,044.43 mi (3,290.20 km) |
| Guaynabo to Matthews (North Carolina) | 1,461.89 mi (2,352.69 km) |
| Guaynabo to Mattoon (Illinois) | 1,972.16 mi (3,173.89 km) |
