The following guidelines have been established by Hawaiian Airlines as part of its refund policy and must be followed by all customers:

The traveller has the right to a refund if Hawaiian Airlines is refused service or the trip is cancelled.
Additionally, if you cancel your reservation up to a day after making it, you may be eligible for a reimbursement. This Refund policy also aids in your ability to pay the unnecessary fine.
As a result, in order to qualify for the refunds offered to some specific groups, one must book their flight at least one week before departure.

Also read : United Airlines refund policy