| Ada to Holbeach | 1,022.59 mi (1,645.69 km) |
| Ada to Holborn | 1,000.78 mi (1,610.60 km) |
| Ada to Hollinwood | 1,123.45 mi (1,808.02 km) |
| Ada to Holyhead | 1,217.08 mi (1,958.70 km) |
| Ada to Holywell | 1,160.45 mi (1,867.57 km) |
| Ada to Honiton | 1,120.80 mi (1,803.75 km) |
| Ada to Horbury | 1,104.14 mi (1,776.94 km) |
| Ada to Horley | 997.18 mi (1,604.81 km) |
| Ada to Hornchurch | 987.94 mi (1,589.93 km) |
| Ada to Horndean | 1,028.07 mi (1,654.53 km) |
| Ada to Hornsey | 1,002.18 mi (1,612.86 km) |
| Ada to Horsell | 1,016.11 mi (1,635.28 km) |
| Ada to Horsforth | 1,111.80 mi (1,789.27 km) |
| Ada to Horsham | 1,001.82 mi (1,612.27 km) |
| Ada to Horwich | 1,140.48 mi (1,835.42 km) |
