| South Portland to Hoyo de Manzanares | 3,316.12 mi (5,336.78 km) |
| South Portland to Huelva | 3,278.78 mi (5,276.68 km) |
| South Portland to Huercal de Almeria | 3,508.27 mi (5,646.01 km) |
| South Portland to Huercal-Overa | 3,514.88 mi (5,656.65 km) |
| South Portland to Huesca | 3,429.72 mi (5,519.61 km) |
| South Portland to Huetor Vega | 3,444.86 mi (5,543.96 km) |
| South Portland to Huetor-Tajar | 3,420.35 mi (5,504.52 km) |
| South Portland to Humanes de Madrid | 3,330.61 mi (5,360.09 km) |
| South Portland to Ibi | 3,536.67 mi (5,691.72 km) |
| South Portland to Ibiza | 3,621.09 mi (5,827.59 km) |
| South Portland to Icod de los Vinos | 3,116.78 mi (5,015.97 km) |
| South Portland to Igualada | 3,540.34 mi (5,697.62 km) |
| South Portland to Illescas | 3,334.68 mi (5,366.64 km) |
| South Portland to Inca | 3,662.15 mi (5,893.66 km) |
| South Portland to Ingenio | 3,197.08 mi (5,145.21 km) |
