| Middletown to Darby (Pennsylvania) | 484.58 mi (779.86 km) |
| Middletown to Dardenne Prairie (Missouri) | 345.00 mi (555.23 km) |
| Middletown to Darien (Illinois) | 244.81 mi (393.98 km) |
| Middletown to Davenport (Iowa) | 356.94 mi (574.44 km) |
| Middletown to Davidson (North Carolina) | 338.76 mi (545.19 km) |
| Middletown to Davie (Florida) | 957.01 mi (1,540.16 km) |
| Middletown to Davis (California) | 1,992.40 mi (3,206.46 km) |
| Middletown to Dayton (Nevada) | 1,867.75 mi (3,005.85 km) |
| Middletown to Dayton (Ohio) | 21.08 mi (33.93 km) |
| Middletown to Daytona Beach (Florida) | 735.77 mi (1,184.10 km) |
| Middletown to De Pere (Wisconsin) | 390.14 mi (627.86 km) |
| Middletown to De Witt (New York) | 494.10 mi (795.17 km) |
| Middletown to Dearborn (Michigan) | 203.23 mi (327.06 km) |
| Middletown to Dearborn Heights (Michigan) | 202.51 mi (325.91 km) |
| Middletown to DeBary (Florida) | 754.07 mi (1,213.55 km) |
