| Didcot to Hilliard (Ohio) | 3,812.46 mi (6,135.56 km) |
| Didcot to Hillsboro (Oregon) | 4,884.21 mi (7,860.38 km) |
| Didcot to Hillsborough (California) | 5,326.89 mi (8,572.81 km) |
| Didcot to Hillsborough (New Jersey) | 3,448.92 mi (5,550.50 km) |
| Didcot to Hilo (Hawaii) | 7,263.05 mi (11,688.75 km) |
| Didcot to Hilton Head Island (South Carolina) | 4,084.85 mi (6,573.94 km) |
| Didcot to Hinesville (Georgia) | 4,138.53 mi (6,660.32 km) |
| Didcot to Hinsdale (Illinois) | 3,916.90 mi (6,303.63 km) |
| Didcot to Hobart (Indiana) | 3,905.09 mi (6,284.63 km) |
| Didcot to Hobbs (New Mexico) | 4,946.30 mi (7,960.30 km) |
| Didcot to Hobe Sound (Florida) | 4,312.03 mi (6,939.54 km) |
| Didcot to Hoboken (New Jersey) | 3,413.09 mi (5,492.83 km) |
| Didcot to Hockessin (Delaware) | 3,522.63 mi (5,669.13 km) |
| Didcot to Hoffman Estates (Illinois) | 3,913.08 mi (6,297.49 km) |
| Didcot to Holbrook (New York) | 3,371.73 mi (5,426.27 km) |
