| Keystone to Decatur (Alabama) | 514.84 mi (828.56 km) |
| Keystone to Decatur (Georgia) | 402.41 mi (647.62 km) |
| Keystone to Decatur (Illinois) | 887.00 mi (1,427.49 km) |
| Keystone to Deer Park (New York) | 1,018.91 mi (1,639.78 km) |
| Keystone to Deer Park (Texas) | 764.18 mi (1,229.83 km) |
| Keystone to Deerfield (Illinois) | 1,013.49 mi (1,631.06 km) |
| Keystone to Deerfield Beach (Florida) | 197.46 mi (317.78 km) |
| Keystone to Defiance (Ohio) | 914.04 mi (1,471.01 km) |
| Keystone to DeForest (Wisconsin) | 1,108.78 mi (1,784.40 km) |
| Keystone to DeKalb (Illinois) | 1,014.23 mi (1,632.25 km) |
| Keystone to Del Aire (California) | 2,144.20 mi (3,450.75 km) |
| Keystone to Del City (Oklahoma) | 1,005.90 mi (1,618.84 km) |
| Keystone to Del Rio (Texas) | 1,109.50 mi (1,785.57 km) |
| Keystone to DeLand (Florida) | 100.66 mi (162.00 km) |
| Keystone to Delano (California) | 2,199.63 mi (3,539.96 km) |
