Old Navy: 15% off Your Purchase (Today Only) November 23, 2011 by Mitchell Wischmann This post may contain a link to an affiliate. See my disclosure policy for more information. Today, November 23rd only, Old Navy is offering 15% off your entire purchase! Just apply coupon code ON15OFF at checkout. Spend $50 or more before the coupon code, and shipping will be FREE as well. Offer not valid on Old Navy boots or Everyday Steals merchandise. Looking for more Old Navy coupon codes? Check out my online coupon codes database!