| Round Rock to Hoddesdon | 4,895.53 mi (7,878.60 km) |
| Round Rock to Holbeach | 4,865.97 mi (7,831.02 km) |
| Round Rock to Holborn | 4,898.77 mi (7,883.81 km) |
| Round Rock to Hollinwood | 4,764.15 mi (7,667.16 km) |
| Round Rock to Holyhead | 4,674.91 mi (7,523.54 km) |
| Round Rock to Holywell | 4,729.78 mi (7,611.85 km) |
| Round Rock to Honiton | 4,797.97 mi (7,721.58 km) |
| Round Rock to Horbury | 4,782.37 mi (7,696.48 km) |
| Round Rock to Horley | 4,906.76 mi (7,896.66 km) |
| Round Rock to Hornchurch | 4,910.36 mi (7,902.47 km) |
| Round Rock to Horndean | 4,882.02 mi (7,856.85 km) |
| Round Rock to Hornsey | 4,896.63 mi (7,880.37 km) |
| Round Rock to Horsell | 4,886.96 mi (7,864.80 km) |
| Round Rock to Horsforth | 4,774.23 mi (7,683.38 km) |
| Round Rock to Horsham | 4,904.08 mi (7,892.36 km) |
