| South Portland to Fort Madison (Iowa) | 1,096.02 mi (1,763.87 km) |
| South Portland to Fort Meade (Maryland) | 457.71 mi (736.62 km) |
| South Portland to Fort Mill (South Carolina) | 822.76 mi (1,324.11 km) |
| South Portland to Fort Mohave (Arizona) | 2,410.90 mi (3,879.97 km) |
| South Portland to Fort Morgan (Colorado) | 1,725.55 mi (2,777.00 km) |
| South Portland to Fort Myers (Florida) | 1,341.12 mi (2,158.32 km) |
| South Portland to Fort Oglethorpe (Georgia) | 997.97 mi (1,606.07 km) |
| South Portland to Fort Payne (Alabama) | 1,038.97 mi (1,672.05 km) |
| South Portland to Fort Pierce (Florida) | 1,252.04 mi (2,014.96 km) |
| South Portland to Fort Smith (Arkansas) | 1,399.07 mi (2,251.58 km) |
| South Portland to Fort Thomas (Kentucky) | 797.63 mi (1,283.66 km) |
| South Portland to Fort Walton Beach (Florida) | 1,277.64 mi (2,056.17 km) |
| South Portland to Fort Washington (Maryland) | 486.00 mi (782.14 km) |
| South Portland to Fort Wayne (Indiana) | 777.30 mi (1,250.94 km) |
| South Portland to Fort Worth (Texas) | 1,638.91 mi (2,637.57 km) |
