| South Portland to Horizon West (Florida) | 1,222.80 mi (1,967.90 km) |
| South Portland to Hormigueros (Puerto Rico) | 1,770.66 mi (2,849.60 km) |
| South Portland to Horn Lake (Mississippi) | 1,210.51 mi (1,948.12 km) |
| South Portland to Hot Springs (Arkansas) | 1,368.50 mi (2,202.38 km) |
| South Portland to Hot Springs Village (Arkansas) | 1,357.97 mi (2,185.44 km) |
| South Portland to Houma (Louisiana) | 1,484.20 mi (2,388.59 km) |
| South Portland to Houston (Texas) | 1,676.77 mi (2,698.49 km) |
| South Portland to Howard (Wisconsin) | 883.97 mi (1,422.61 km) |
| South Portland to Huber Heights (Ohio) | 757.64 mi (1,219.30 km) |
| South Portland to Hudson (Florida) | 1,259.29 mi (2,026.63 km) |
| South Portland to Hudson (Ohio) | 591.62 mi (952.13 km) |
| South Portland to Hudson (Wisconsin) | 1,110.03 mi (1,786.42 km) |
| South Portland to Hueytown (Alabama) | 1,143.16 mi (1,839.73 km) |
| South Portland to Hugo (Minnesota) | 1,120.40 mi (1,803.12 km) |
| South Portland to Humacao (Puerto Rico) | 1,779.58 mi (2,863.95 km) |
