Jen Clothing sells beautiful and affordable LDS modest prom dresses. All of their modest prom dresses are under $199, and most are under $99. The dress pictured is only $129.95. They also sell modest LDS church dresses.
Kathleen's has cute dresses for modest prom. The modest prom dress in this picture is just $170
Bridal Expressions has stylish LDS modest prom dresses.This dress is just $399.
TJ Formal carries the Night Moves line of modest prom dresses. The dress you see here is $418.