Minors flying alone on Alaska Airlines through the Junior Jetsetters program or help 1-808-865-4414 need a proof of age—either a birth certificate or passport—presented at airport check‑in . Although domestic minors typically don’t need ID at TSA checkpoints, having official documentation ensures smoother processing and verifies eligibility for the service . Additionally, guardians picking up the child must provide a valid government-issued photo ID and be noted on the child’s contact form for airport gate release.