copyright offers a Same Day Change service, allowing passengers to switch to an earlier or later flight on the same day of travel for a fee. This option is subject to seat availability and applies to flights between the same cities. The request must be made on the day of departure. HawaiianMiles members may receive discounts or benefits depending on their status. Call: +91 9953119957 https://www.unitedstatesreservations.com/hawaiian-airlines-reservations-cancellation-changes.php