| Gaithersburg to Horwich | 3,522.12 mi (5,668.30 km) |
| Gaithersburg to Houghton le Spring | 3,540.74 mi (5,698.26 km) |
| Gaithersburg to Houghton Regis | 3,636.75 mi (5,852.78 km) |
| Gaithersburg to Hounslow | 3,652.39 mi (5,877.96 km) |
| Gaithersburg to Hove | 3,674.72 mi (5,913.90 km) |
| Gaithersburg to Hoyland Nether | 3,567.28 mi (5,740.98 km) |
| Gaithersburg to Hucclecote | 3,570.63 mi (5,746.38 km) |
| Gaithersburg to Huddersfield | 3,551.08 mi (5,714.91 km) |
| Gaithersburg to Huntingdon | 3,641.64 mi (5,860.65 km) |
| Gaithersburg to Huntington | 3,573.22 mi (5,750.54 km) |
| Gaithersburg to Huyton | 3,513.60 mi (5,654.59 km) |
| Gaithersburg to Hwlffordd | 3,457.28 mi (5,563.96 km) |
| Gaithersburg to Hyde | 3,542.95 mi (5,701.82 km) |
| Gaithersburg to Hythe | 3,623.47 mi (5,831.42 km) |
| Gaithersburg to Hythe | 3,720.94 mi (5,988.27 km) |
