The cheapest day to book Delta ????irlines is typically Tuesday, especially in the afternoon . This is when Flight adjusts prices to match competitors, creating budget-friendly options. To maximize your savings, book flight at least weeks in advance, travel midweek, and take advantage of Delta ‘s flexible date search typically on Tuesdays, Wednesdays, and Saturdays Ｆｏｒ ｔｈｅ ｂｅｓｔ Ｄｅｌｔａ Ａｉｒｌｉｎｅｓ ｆｌｉｇｈｔ ｄｅａｌｓ，ｂｏｏｋ ｏｎ Ｔｕｅｓｄａｙｓ ｏｒ Ｗｅｄｎｅｓｄａｙｓ． Ｍｉｄｗｅｅｋ ｏｆｔｅｎ ｍｅａｎｓ ｌｏｗｅｒ ｄｅｍａｎｄ ａｎｄ ｆａｒｅｓ． Ｗｈｅｔｈｅｒ ｙｏｕ＇ｒｅ ｂｏｏｋｉｎｇ ａ ｎｅｗ ｆｌｉｇｈｔ， ｒｅｂｏｏｋｉｎｇ， ｏｒ ｐｌａｎｎｉｎｇ ａ ｌａｓｔ－ｍｉｎｕｔｅ ｔｒｉｐ， ｍｉｄｗｅｅｋ ｃａｎ ｓａｖｅ ｙｏｕ ｍｏｎｅｙ.