| Philadelphia to Decatur (Alabama) | 751.22 mi (1,208.98 km) |
| Philadelphia to Decatur (Georgia) | 664.20 mi (1,068.93 km) |
| Philadelphia to Decatur (Illinois) | 730.50 mi (1,175.63 km) |
| Philadelphia to Deer Park (New York) | 108.69 mi (174.91 km) |
| Philadelphia to Deer Park (Texas) | 1,333.81 mi (2,146.56 km) |
| Philadelphia to Deerfield (Illinois) | 678.17 mi (1,091.41 km) |
| Philadelphia to Deerfield Beach (Florida) | 989.38 mi (1,592.26 km) |
| Philadelphia to Defiance (Ohio) | 491.67 mi (791.26 km) |
| Philadelphia to DeForest (Wisconsin) | 765.86 mi (1,232.54 km) |
| Philadelphia to DeKalb (Illinois) | 721.76 mi (1,161.56 km) |
| Philadelphia to Del Aire (California) | 2,399.86 mi (3,862.20 km) |
| Philadelphia to Del City (Oklahoma) | 1,255.38 mi (2,020.33 km) |
| Philadelphia to Del Rio (Texas) | 1,628.73 mi (2,621.19 km) |
| Philadelphia to DeLand (Florida) | 835.39 mi (1,344.42 km) |
| Philadelphia to Delano (California) | 2,399.57 mi (3,861.73 km) |
