Hawaiian Airlines' cancellation policy is the 24-hour grace period. Passengers have the flexibility to make changes to their reservations within 24 hours of booking without incurring any cancellation fees. This is particularly beneficial for those who need to adjust plans shortly after making a reservation . Hawaiian Airlines cancellation policy offers various fare types, each with its own set of rules regarding cancellations and refunds. It's crucial for passengers to carefully review the terms and conditions associated with their specific fare type to understand potential costs and limitations involved in the cancellation process .