Click the Manage Flights link at the top of the Hawaiian Airlines home page, then My Trips. Enter the passenger's last name and the itinerary number or confirmation code. Click the Hawaiian Change flight link just above the trip summary on the itinerary page. Click Continue after selecting the passengers for whom you want to alter flights. Choose the flights you want to alter. Click "Find New Flights" after modifying your route and travel dates. Make your new flight selections. After reviewing the itinerary, click Continue. Choose new seats. Review the schedule and seats, then purchase by clicking Book this trip. Please contact Hawaiian Airlines customer support if you receive an error message or are unable to alter flights.