Typically, minors under the age of 18 do not have to present identification for domestic U.S. travel. Airlines will accept identification from the responsible adult on behalf of the minor(s). For international travel, minors under the age of 18 must present the same travel documents as the adult.

For domestic travel within the United States in 2026, a 15-year-old generally does not need a photo ID. TSA regulations state that travelers under the age of 18 do not have to present identification when flying with an adult companion. However, if the 15-year-old is traveling as an Unaccompanied Minor, many airlines (like Delta, United, and American) may require a school ID, birth certificate, or a "Minor Travel Consent" form to verify their age and identity. It is also important to note that the adult dropping them off must have a REAL ID-compliant license or a valid passport to enter the terminal with them. For a 15-year-old, carrying a simple photo ID (like a school card) is a "pro-tip" to avoid any confusion at the gate, though it is not a legal requirement for passing through the TSA security checkpoint.