| South Portland to Home Gardens (California) | 2,594.92 mi (4,176.12 km) |
| South Portland to Homer Glen (Illinois) | 907.00 mi (1,459.68 km) |
| South Portland to Homestead (Florida) | 1,379.20 mi (2,219.60 km) |
| South Portland to Homewood (Alabama) | 1,132.39 mi (1,822.41 km) |
| South Portland to Homewood (Illinois) | 893.39 mi (1,437.77 km) |
| South Portland to Homosassa Springs (Florida) | 1,227.66 mi (1,975.73 km) |
| South Portland to Honeygo (Maryland) | 431.16 mi (693.88 km) |
| South Portland to Honolulu (Hawaii) | 5,096.07 mi (8,201.33 km) |
| South Portland to Hoover (Alabama) | 1,136.35 mi (1,828.78 km) |
| South Portland to Hopatcong (New Jersey) | 289.91 mi (466.56 km) |
| South Portland to Hope Mills (North Carolina) | 755.99 mi (1,216.64 km) |
| South Portland to Hopewell (Virginia) | 571.93 mi (920.44 km) |
| South Portland to Hopkins (Minnesota) | 1,143.11 mi (1,839.65 km) |
| South Portland to Hopkinsville (Kentucky) | 1,018.13 mi (1,638.53 km) |
| South Portland to Horizon City (Texas) | 2,109.80 mi (3,395.39 km) |
