| Keystone to Darby (Pennsylvania) | 915.76 mi (1,473.78 km) |
| Keystone to Dardenne Prairie (Missouri) | 870.17 mi (1,400.40 km) |
| Keystone to Darien (Illinois) | 988.22 mi (1,590.39 km) |
| Keystone to Davenport (Iowa) | 1,031.54 mi (1,660.11 km) |
| Keystone to Davidson (North Carolina) | 518.58 mi (834.58 km) |
| Keystone to Davie (Florida) | 200.85 mi (323.23 km) |
| Keystone to Davis (California) | 2,351.07 mi (3,783.69 km) |
| Keystone to Dayton (Nevada) | 2,241.41 mi (3,607.21 km) |
| Keystone to Dayton (Ohio) | 810.06 mi (1,303.66 km) |
| Keystone to Daytona Beach (Florida) | 117.20 mi (188.62 km) |
| Keystone to De Pere (Wisconsin) | 1,166.08 mi (1,876.63 km) |
| Keystone to De Witt (New York) | 1,091.72 mi (1,756.96 km) |
| Keystone to Dearborn (Michigan) | 980.45 mi (1,577.88 km) |
| Keystone to Dearborn Heights (Michigan) | 980.84 mi (1,578.51 km) |
| Keystone to DeBary (Florida) | 93.21 mi (150.01 km) |
