Get up to 25% off Las Vegas hotel rooms during the Semi Annual Sale. Click Here to Book Now. Reserve your stay before April 29, 2019 and get rooms as low as $32 per night through Feb. 29, 2020. Promo Code SEMI19. Blackout dates may apply. Includes Caesars Palace, LINQ Hotel & Casino, Flamingo Las Vegas, The Cromwell, Rio All-suite Hotel & Casino, Bally’s, Harrah’s, Paris and Planet Hollywood and more!