| Keystone to Dover (New Hampshire) | 1,228.02 mi (1,976.31 km) |
| Keystone to Dover (New Jersey) | 991.96 mi (1,596.40 km) |
| Keystone to Dover (Ohio) | 859.06 mi (1,382.52 km) |
| Keystone to Downers Grove (Illinois) | 992.09 mi (1,596.61 km) |
| Keystone to Downey (California) | 2,130.57 mi (3,428.81 km) |
| Keystone to Dranesville (Virginia) | 808.40 mi (1,301.00 km) |
| Keystone to Draper (Utah) | 1,863.50 mi (2,999.02 km) |
| Keystone to Drexel Heights (Arizona) | 1,717.22 mi (2,763.60 km) |
| Keystone to Drexel Hill (Pennsylvania) | 916.37 mi (1,474.75 km) |
| Keystone to Duarte (California) | 2,120.57 mi (3,412.73 km) |
| Keystone to Dublin (California) | 2,354.41 mi (3,789.05 km) |
| Keystone to Dublin (Georgia) | 304.97 mi (490.80 km) |
| Keystone to Dublin (Ohio) | 828.32 mi (1,333.05 km) |
| Keystone to Dubuque (Iowa) | 1,091.65 mi (1,756.84 km) |
| Keystone to Duluth (Georgia) | 416.07 mi (669.60 km) |
