| Keystone to Delaware (Ohio) | 840.19 mi (1,352.15 km) |
| Keystone to Delhi (California) | 2,291.63 mi (3,688.02 km) |
| Keystone to Delray Beach (Florida) | 192.74 mi (310.19 km) |
| Keystone to Deltona (Florida) | 99.70 mi (160.45 km) |
| Keystone to Deming (New Mexico) | 1,525.25 mi (2,454.65 km) |
| Keystone to Denison (Texas) | 914.29 mi (1,471.40 km) |
| Keystone to Dent (Ohio) | 773.26 mi (1,244.44 km) |
| Keystone to Denton (Texas) | 931.79 mi (1,499.56 km) |
| Keystone to Dentsville (South Carolina) | 422.06 mi (679.24 km) |
| Keystone to Denver (Colorado) | 1,502.08 mi (2,417.37 km) |
| Keystone to Depew (New York) | 1,044.15 mi (1,680.39 km) |
| Keystone to Derby (Connecticut) | 1,058.23 mi (1,703.06 km) |
| Keystone to Derby (Kansas) | 1,069.12 mi (1,720.58 km) |
| Keystone to Des Moines (Iowa) | 1,116.89 mi (1,797.47 km) |
| Keystone to Des Moines (Washington) | 2,505.91 mi (4,032.87 km) |
