| Catonsville to Hoddesdon | 3,635.61 mi (5,850.96 km) |
| Catonsville to Holbeach | 3,614.38 mi (5,816.77 km) |
| Catonsville to Holborn | 3,636.85 mi (5,852.95 km) |
| Catonsville to Hollinwood | 3,514.48 mi (5,656.01 km) |
| Catonsville to Holyhead | 3,419.24 mi (5,502.73 km) |
| Catonsville to Holywell | 3,476.16 mi (5,594.35 km) |
| Catonsville to Honiton | 3,525.32 mi (5,673.45 km) |
| Catonsville to Horbury | 3,534.97 mi (5,688.99 km) |
| Catonsville to Horley | 3,642.15 mi (5,861.47 km) |
| Catonsville to Hornchurch | 3,649.34 mi (5,873.04 km) |
| Catonsville to Horndean | 3,613.99 mi (5,816.15 km) |
| Catonsville to Hornsey | 3,635.21 mi (5,850.30 km) |
| Catonsville to Horsell | 3,622.76 mi (5,830.27 km) |
| Catonsville to Horsforth | 3,528.20 mi (5,678.09 km) |
| Catonsville to Horsham | 3,638.36 mi (5,855.38 km) |
