| Katy to Duluth (Minnesota) | 1,190.19 mi (1,915.43 km) |
| Katy to Dumas (Texas) | 549.79 mi (884.80 km) |
| Katy to Dumont (New Jersey) | 1,445.80 mi (2,326.79 km) |
| Katy to Duncan (Oklahoma) | 350.13 mi (563.49 km) |
| Katy to Duncanville (Texas) | 207.31 mi (333.63 km) |
| Katy to Dundalk (Maryland) | 1,276.95 mi (2,055.05 km) |
| Katy to Dunedin (Florida) | 798.07 mi (1,284.37 km) |
| Katy to Dunkirk (New York) | 1,267.15 mi (2,039.28 km) |
| Katy to Dunmore (Pennsylvania) | 1,385.85 mi (2,230.32 km) |
| Katy to Dunwoody (Georgia) | 733.91 mi (1,181.11 km) |
| Katy to Durango (Colorado) | 863.58 mi (1,389.80 km) |
| Katy to Durant (Oklahoma) | 292.33 mi (470.45 km) |
| Katy to Durham (North Carolina) | 1,069.55 mi (1,721.27 km) |
| Katy to Dyer (Indiana) | 933.17 mi (1,501.79 km) |
| Katy to Dyersburg (Tennessee) | 571.63 mi (919.95 km) |
