The cheapest day to fly with Delta is usually Tuesdays, Wednesdays, and Saturdays. Dial phone number+1-8884911877//+????-????????????-????????????-???????????????? (live agent) And Fridays are considered the most expensive day to travel with Delta and other Delta ????irlines. Does Delta ????irlines drop prices on Tuesdays? Usually, Tuesday afternoon is the best time to buy ???????????????????? ???????????????????????????????? tickets for your trip. This is so because various ????irlines launch exciting deals and huge discounts late on Mondays or early Tuesdays. So, you can grab the best deals for the lowest ???????? ????light fares at Tuesday midnight and noon. What day is the cheapest to book Delta ????irlines?