Nordstrom offers the ASTR Women's Wrap Front High-Low Dress in Blue/Multi-Floral for $40.80 with free shipping. That's $27 off list and the lowest total price we could find. It's available in size L only.
Nordstrom cuts up to 65% off a selection of women's dresses, with prices starting from $18.62. (Prices are as marked.) Plus, all orders receive free shipping. Some sizes are limited. A couple of best bets: