| Didcot to Dardenne Prairie (Missouri) | 4,168.66 mi (6,708.82 km) |
| Didcot to Darien (Illinois) | 3,921.58 mi (6,311.18 km) |
| Didcot to Davenport (Iowa) | 4,030.01 mi (6,485.68 km) |
| Didcot to Davidson (North Carolina) | 3,930.07 mi (6,324.83 km) |
| Didcot to Davie (Florida) | 4,368.16 mi (7,029.88 km) |
| Didcot to Davis (California) | 5,250.68 mi (8,450.16 km) |
| Didcot to Dayton (Nevada) | 5,145.05 mi (8,280.15 km) |
| Didcot to Dayton (Ohio) | 3,865.42 mi (6,220.79 km) |
| Didcot to Daytona Beach (Florida) | 4,246.21 mi (6,833.61 km) |
| Didcot to De Pere (Wisconsin) | 3,802.26 mi (6,119.15 km) |
| Didcot to De Witt (New York) | 3,398.75 mi (5,469.77 km) |
| Didcot to Dearborn (Michigan) | 3,711.61 mi (5,973.27 km) |
| Didcot to Dearborn Heights (Michigan) | 3,713.94 mi (5,977.01 km) |
| Didcot to DeBary (Florida) | 4,271.49 mi (6,874.29 km) |
| Didcot to Decatur (Alabama) | 4,224.45 mi (6,798.60 km) |
