| South Portland to Forney (Texas) | 1,598.03 mi (2,571.78 km) |
| South Portland to Forrest City (Arkansas) | 1,242.40 mi (1,999.44 km) |
| South Portland to Fort Atkinson (Wisconsin) | 932.67 mi (1,500.99 km) |
| South Portland to Fort Bliss (Texas) | 2,112.82 mi (3,400.25 km) |
| South Portland to Fort Campbell North (Kentucky) | 1,024.68 mi (1,649.06 km) |
| South Portland to Fort Carson (Colorado) | 1,811.87 mi (2,915.92 km) |
| South Portland to Fort Collins (Colorado) | 1,782.62 mi (2,868.85 km) |
| South Portland to Fort Dodge (Iowa) | 1,203.91 mi (1,937.51 km) |
| South Portland to Fort Drum (New York) | 275.29 mi (443.04 km) |
| South Portland to Fort Hood (Texas) | 1,727.00 mi (2,779.33 km) |
| South Portland to Fort Hunt (Virginia) | 487.83 mi (785.09 km) |
| South Portland to Fort Lauderdale (Florida) | 1,328.97 mi (2,138.76 km) |
| South Portland to Fort Lee (New Jersey) | 268.95 mi (432.84 km) |
| South Portland to Fort Leonard Wood (Missouri) | 1,209.58 mi (1,946.63 km) |
| South Portland to Fort Lewis (Washington) | 2,501.55 mi (4,025.86 km) |
