Visit Delta’s online mall at http://www.skymilesshopping.com and click the Bonus Miles link at the top of the page to view all of the mall’s bonus offers, such as seven miles per dollar spent at Lancome or six miles per dollar spent at Red Envelope. Click Holiday Shopping to view additional offers. SkyMiles members will earn the standard miles per dollar spent at retailers found through the Holiday Shopping link, but many online retailers are offering special offers for holiday shopping, such as free shipping through Dec. 31.