Target offers the Merona Women's Pullover Sweatshirt in New Orleans Red (pictured) and Navy Reunion for $19.99. Coupon code "JOY30" drops it to $13.99. With free shipping, that's $6 off and the lowest total price we could find. It's available in sizes XS to XXL, although not in all size/color combinations.
Orders placed by December 20 are guaranteed to arrive by Christmas.