Once a customer has checked in for a Hawaiian Airlines flight, it is generally more challenging to make changes to their itinerary. Typically, passengers are encouraged to finalize their travel plans before the check-in process. If there is a need for changes after check-in, such as altering the flight time or destination, the options may be limited. Customers may be able to modify or cancel their flight through the Hawaiian Airlines website or app, depending on the fare type and the specific circumstances.
However, certain changes might require contacting a Hawaiian Airlines representative or visiting the airline's service desk at the airport, especially if the changes are significant. It is important to note that fees or fare differences may apply, depending on the original ticket conditions. For the most accurate and detailed information, including any current policies or procedures regarding changes after check-in, it is always a good idea to refer to the airline's official website.