| South Portland to Hillcrest Heights (Maryland) | 479.26 mi (771.29 km) |
| South Portland to Hilliard (Ohio) | 706.59 mi (1,137.15 km) |
| South Portland to Hillsboro (Oregon) | 2,547.22 mi (4,099.35 km) |
| South Portland to Hillsborough (California) | 2,718.67 mi (4,375.27 km) |
| South Portland to Hillsborough (New Jersey) | 310.83 mi (500.23 km) |
| South Portland to Hilo (Hawaii) | 5,035.95 mi (8,104.58 km) |
| South Portland to Hilton Head Island (South Carolina) | 972.98 mi (1,565.86 km) |
| South Portland to Hinesville (Georgia) | 1,021.82 mi (1,644.46 km) |
| South Portland to Hinsdale (Illinois) | 902.51 mi (1,452.45 km) |
| South Portland to Hobart (Indiana) | 874.83 mi (1,407.91 km) |
| South Portland to Hobbs (New Mexico) | 1,921.78 mi (3,092.80 km) |
| South Portland to Hobe Sound (Florida) | 1,269.45 mi (2,042.98 km) |
| South Portland to Hoboken (New Jersey) | 276.32 mi (444.70 km) |
| South Portland to Hockessin (Delaware) | 384.57 mi (618.91 km) |
| South Portland to Hoffman Estates (Illinois) | 909.26 mi (1,463.32 km) |
