| South Portland to Malvern (Arkansas) | 1,362.24 mi (2,192.32 km) |
| South Portland to Manassas (Virginia) | 503.39 mi (810.13 km) |
| South Portland to Manassas Park (Virginia) | 500.70 mi (805.80 km) |
| South Portland to Manatí (Puerto Rico) | 1,755.37 mi (2,825.00 km) |
| South Portland to Manchester (Missouri) | 1,105.47 mi (1,779.08 km) |
| South Portland to Manchester (New Hampshire) | 73.26 mi (117.90 km) |
| South Portland to Manchester (Tennessee) | 1,010.22 mi (1,625.80 km) |
| South Portland to Manchester (Virginia) | 569.50 mi (916.52 km) |
| South Portland to Mandan (North Dakota) | 1,495.47 mi (2,406.73 km) |
| South Portland to Mandeville (Louisiana) | 1,419.08 mi (2,283.80 km) |
| South Portland to Mango (Florida) | 1,270.15 mi (2,044.10 km) |
| South Portland to Manhattan (Kansas) | 1,391.49 mi (2,239.38 km) |
| South Portland to Manhattan (New York) | 272.19 mi (438.05 km) |
| South Portland to Manhattan Beach (California) | 2,638.79 mi (4,246.72 km) |
| South Portland to Manitowoc (Wisconsin) | 865.35 mi (1,392.65 km) |
