| South Portland to Hoddesdon | 3,186.56 mi (5,128.27 km) |
| South Portland to Holbeach | 3,164.78 mi (5,093.22 km) |
| South Portland to Holborn | 3,187.97 mi (5,130.54 km) |
| South Portland to Hollinwood | 3,064.77 mi (4,932.27 km) |
| South Portland to Holyhead | 2,969.78 mi (4,779.40 km) |
| South Portland to Holywell | 3,026.62 mi (4,870.87 km) |
| South Portland to Honiton | 3,077.57 mi (4,952.87 km) |
| South Portland to Horbury | 3,085.18 mi (4,965.12 km) |
| South Portland to Horley | 3,193.52 mi (5,139.47 km) |
| South Portland to Hornchurch | 3,200.38 mi (5,150.52 km) |
| South Portland to Horndean | 3,165.71 mi (5,094.72 km) |
| South Portland to Hornsey | 3,186.28 mi (5,127.82 km) |
| South Portland to Horsell | 3,174.08 mi (5,108.19 km) |
| South Portland to Horsforth | 3,078.37 mi (4,954.16 km) |
| South Portland to Horsham | 3,189.84 mi (5,133.56 km) |
