Through 5/5, book a Wynn or Encore Las Vegas package through Southwest Vacations and save up to $75 with code LAS2011. You must stay three or more nights to get this discount and travel must be made from 5/1/11 - 9/9/11. Plus, receive 20% off your hotel stay on select room categories and a $100 dining credit valid only for travel 6/12/11 - 8/27/11. A free room upgrade upon check in may also be available when you book a resort room. A seven day advanced purchase is required. Blackout dates, taxes and additional fees apply.