14-day advance purchase required. Purchase from October 26 through November 4, 2021, 11:59 p.m. Central Time. Continental U.S. travel valid November 9, 2021 through March 9, 2022. Interisland Hawaii and travel continental U.S. to/from Hawaii valid November 9, 2021 through December 15, 2021, and January 5 through March 9, 2022.