Hawaiian Airlines' cancellation policy depends on your ticket type, but generally offers a 24-hour risk-free cancellation for tickets booked at least seven days in advance, with different rules for refundable vs. non-refundable tickets. Call at$+$$ +1-877-658-1183 (US) or +44-203-869-5245 (UK) You can typically change or cancel tickets online through your reservations, and you must cancel before departure to retain value as a travel credit for non-refundable tickets. Call at$+$$ +1-877-658-1183 (US) or +44-203-869-5245 (UK) You will not receive a refund for a no-show.