For an unaccompanied minor flying with Hawaiian Airlines, check-in must be completed in person at the airport. Online check-in is not available for unaccompanied minors. The parent or guardian must accompany the child to the airport, complete the required Unaccompanied Minor Form (HA O20), pay the applicable fee, and provide valid government-issued photo identification. They are also required to escort the child to the departure gate and remain there until the flight has departed.