A Delta Air Lines ticket number is a 13-digit number that uniquely identifies your electronic ticket (e-ticket). It is an essential identifier for tracking your flight history and for managing any changes to your itinerary. For Delta, all ticket numbers begin with the three-digit airline prefix 006. The following 10 digits are your specific ticket number, with the final digit often used for internal airline tracking. You can find this 13-digit number on your Delta Flight Receipt (the email you received when you booked your trip) or at the top of your boarding pass. It is important to note that this is different from your six-digit "Confirmation Code" or "Record Locator" (e.g., ABCDEF), which is used for check-in. In 2026, you may also see a "14th" digit listed on some boarding passes, but this is usually a "check digit" and not part of the primary ticket number.