| Ionia to Hoddesdon | 3,795.97 mi (6,109.02 km) |
| Ionia to Holbeach | 3,764.63 mi (6,058.59 km) |
| Ionia to Holborn | 3,799.72 mi (6,115.05 km) |
| Ionia to Hollinwood | 3,662.63 mi (5,894.44 km) |
| Ionia to Holyhead | 3,574.82 mi (5,753.11 km) |
| Ionia to Holywell | 3,629.12 mi (5,840.50 km) |
| Ionia to Honiton | 3,702.62 mi (5,958.79 km) |
| Ionia to Horbury | 3,680.42 mi (5,923.07 km) |
| Ionia to Horley | 3,808.43 mi (6,129.08 km) |
| Ionia to Hornchurch | 3,811.05 mi (6,133.29 km) |
| Ionia to Horndean | 3,784.81 mi (6,091.06 km) |
| Ionia to Hornsey | 3,797.45 mi (6,111.40 km) |
| Ionia to Horsell | 3,788.56 mi (6,097.10 km) |
| Ionia to Horsforth | 3,672.07 mi (5,909.63 km) |
| Ionia to Horsham | 3,806.09 mi (6,125.31 km) |
