You can change your Hawaiian Airlines flight online by logging into My Trips on their website. Once there, select your reservation and click “Change Flights.” You’ll be shown alternate flight options, and any fare difference will apply. Hawaiian Airlines typically waives change fees for Main Cabin and above, but Basic fares may have restrictions. You can also contact customer service or your travel agent for help. If you booked with miles, the difference in mileage will be adjusted automatically. Always double-check fare rules and schedules before confirming changes.