Take an extra 40% off dresses when you use the code MAY during checkout at OldNavy.com. Shipping is free on orders over $50, otherwise it adds $7. The promotion includes this Fit & Flare Cami Midi Dress, which listed at $32.94. It was already on sale for $30, and it drops to $18 with the code. This Jersey Tee Dress falls from $26.94 to $24 to $14.40. These are the best prices we can find anywhere. Some sizes may sell out quickly, but there are many styles to choose from. Sales tax is charged in most states.