Do Jetblue prices go down on Tuesdays? The cheapest day to buy Jetblue Airlines tickets is typically on Tuesdays, Wednesdays, and Saturdays. Fares are usually lower on Tuesdays , Wednesdays, and Saturdays, with the highest prices on Fridays and Sundays. What is the cheapest day to fly Jetblue? The cheapest day to buy Jetblue Airlines tickets is typically on Tuesdays, Wednesdays, and Saturdays. Fares are usually lower on Tuesdays , Wednesdays, and Saturdays, with the highest prices on Fridays and Sundays  .