| South Portland to Hamtramck (Michigan) | 649.93 mi (1,045.97 km) |
| South Portland to Hanahan (South Carolina) | 906.42 mi (1,458.75 km) |
| South Portland to Hanford (California) | 2,622.32 mi (4,220.22 km) |
| South Portland to Hannibal (Missouri) | 1,119.06 mi (1,800.95 km) |
| South Portland to Hanover (Pennsylvania) | 434.28 mi (698.91 km) |
| South Portland to Hanover Park (Illinois) | 910.43 mi (1,465.20 km) |
| South Portland to Happy Valley (Oregon) | 2,529.12 mi (4,070.23 km) |
| South Portland to Harker Heights (Texas) | 1,723.84 mi (2,774.25 km) |
| South Portland to Harlingen (Texas) | 1,949.88 mi (3,138.04 km) |
| South Portland to Harper Woods (Michigan) | 643.00 mi (1,034.80 km) |
| South Portland to Harrisburg (North Carolina) | 796.01 mi (1,281.06 km) |
| South Portland to Harrisburg (Pennsylvania) | 410.39 mi (660.47 km) |
| South Portland to Harrison (Arkansas) | 1,307.30 mi (2,103.89 km) |
| South Portland to Harrison (New Jersey) | 280.90 mi (452.06 km) |
| South Portland to Harrison (New York) | 251.25 mi (404.35 km) |
