Coach takes up to 50% off a selection of women's shoes as part of its Semi-Annual Shoe Sale. (Prices are as marked.) That's tied with our February mention (which also included men's shoes) and one of the stronger sales we've seen on sale items from Coach in recent months; we saw 65% off clearance items last week. Shipping starts at $5, or get free shipping on orders of $150 or more.
For a best bet, search for "alessa flip flop" to find the Coach Women's Alessa Flip Flops in Pink (pictured), Navy, or Chalk for $29 plus $5 for shipping. That's $11 off and the lowest total price we could find. They're available in sizes 5 to 11.