| Katy to Decatur (Alabama) | 613.37 mi (987.13 km) |
| Katy to Decatur (Georgia) | 730.85 mi (1,176.18 km) |
| Katy to Decatur (Illinois) | 797.39 mi (1,283.27 km) |
| Katy to Deer Park (New York) | 1,472.40 mi (2,369.61 km) |
| Katy to Deer Park (Texas) | 43.76 mi (70.43 km) |
| Katy to Deerfield (Illinois) | 963.44 mi (1,550.51 km) |
| Katy to Deerfield Beach (Florida) | 986.73 mi (1,587.98 km) |
| Katy to Defiance (Ohio) | 1,020.88 mi (1,642.95 km) |
| Katy to DeForest (Wisconsin) | 995.30 mi (1,601.79 km) |
| Katy to DeKalb (Illinois) | 927.14 mi (1,492.08 km) |
| Katy to Del Aire (California) | 1,349.90 mi (2,172.46 km) |
| Katy to Del City (Oklahoma) | 401.91 mi (646.81 km) |
| Katy to Del Rio (Texas) | 304.49 mi (490.03 km) |
| Katy to DeLand (Florida) | 876.67 mi (1,410.87 km) |
| Katy to Delano (California) | 1,418.21 mi (2,282.39 km) |
