https://supportcommunity.milestonesys.com/s/question/0D5bH00000ZDw9DSAT/what-is-the-cheapest-day-to-buy-flights-on-united?language=en_UShttps://supportcommunity.milestonesys.com/s/question/0D5bH00000ZDw9DSAT/what-is-the-cheapest-day-to-buy-flights-on-united?language=en_UShttps://supportcommunity.milestonesys.com/s/question/0D5bH00000ZDw9DSAT/what-is-the-cheapest-day-to-buy-flights-on-united?language=en_US