dec18 delta skymiles flash sale December 6, 2018 at 1079 × 909 in NASTY – Delta adds E Basic fare class SkyMiles awards! December’s monthly SkyMiles “flash sale” live. A220 test flights ongoing out of ATL. ← Previous / Next → This post contains references to products from one or more of our advertisers. We may receive compensation when you click on links to those products. For an explanation of our advertising policy, visit visit this page.