| Middletown to Dover (New Hampshire) | 743.17 mi (1,196.01 km) |
| Middletown to Dover (New Jersey) | 525.99 mi (846.50 km) |
| Middletown to Dover (Ohio) | 168.35 mi (270.94 km) |
| Middletown to Downers Grove (Illinois) | 248.37 mi (399.71 km) |
| Middletown to Downey (California) | 1,897.51 mi (3,053.75 km) |
| Middletown to Dranesville (Virginia) | 375.90 mi (604.96 km) |
| Middletown to Draper (Utah) | 1,450.98 mi (2,335.13 km) |
| Middletown to Drexel Heights (Arizona) | 1,571.92 mi (2,529.77 km) |
| Middletown to Drexel Hill (Pennsylvania) | 482.34 mi (776.25 km) |
| Middletown to Duarte (California) | 1,882.26 mi (3,029.21 km) |
| Middletown to Dublin (California) | 2,015.38 mi (3,243.44 km) |
| Middletown to Dublin (Georgia) | 488.03 mi (785.41 km) |
| Middletown to Dublin (Ohio) | 77.20 mi (124.25 km) |
| Middletown to Dubuque (Iowa) | 389.97 mi (627.60 km) |
| Middletown to Duluth (Georgia) | 380.06 mi (611.65 km) |
