There is a 21-day advance purchase required. Purchase from March 30 through April 8, 2021, 11:59 p.m. Central Time. Continental U.S., San Juan, Puerto Rico, and international travel valid April 20 through June 30, 2021. Travel continental U.S. to/from Hawaii valid April 20 through May 26, 2021. Continental U.S. travel blacked out May 27-28 and May 31, 2021. Except as otherwise specified, continental U.S. travel is valid only on Tuesdays and Wednesdays.