Purchase from May 25 through June 10, 2021, 11:59 p.m. Central Time. Continental U.S., interisland Hawaii, San Juan, Puerto Rico, and international travel valid August 17 through November 5, 2021. Travel continental U.S. to/from Hawaii valid August 9 through November 5, 2021. Continental U.S. travel blacked out September 3 and September 6, 2021.