On a Delta Air Lines Basic Economy ticket in 2026, you are still permitted one carry-on bag and one personal item for free, which distinguishes Delta from some other major carriers that restrict Basic Economy to a personal item only. Your carry-on bag must not exceed 22 x 14 x 9 inches (56 x 35 x 23 cm), including handles and wheels. It must be able to fit in the overhead bin. Your personal item, such as a purse, briefcase, or small backpack, must fit under the seat in front of you. While the bag size is standard, the "Basic Economy" catch is that you will be in the last boarding group, meaning overhead bin space may be limited by the time you board. If the bins are full, Delta will gate-check your carry-on to your final destination at no charge, but you will still need to ensure it meets the size requirements to avoid being forced to pay a checked bag fee at the ticket counter before passing through security.