We got my daughters homecoming dress from JJ's House. The quality was a lot better than I expected.

They offer free return shipping so we were able to order a bunch of different styles and sizes to see what fit.
https://www.jjshouse.com/?srsltid=AfmBOooOp676B1QkE_VdmjOvJ3WIGKducJHFebiAEk2BWfCfb-vM4okN

i would try the department stores - macys, nordstrom/nordstrom rack, dillards, belk, maybe jc penny, kohls. happy shopping!

Macy's might have stuff. We used to find great homecoming dresses there.

Where are good sites to shop online for a prom dress? I know of Lulu’s. Any other ideas? Not too high end, maybe max $250.